MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Braz J Biol' source. Mon, 26 Sep 2011 20:57:07 +0100 http://www.medworm.com/index.php?rid=5189910&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881780%26dopt%3DAbstract Authors: Chagas R, Ferrari S Abstract The recently-discovered titi, Callicebus coimbrai, is endemic to the coastal Brazilian Atlantic Forest south of the São Francisco River, a region with a long tradition of deforestation. While a number of C. coimbrai populations have now been identified, little is known about basic population parameters. Considering the importance of this information for conservation planning, the population of a site in southern Sergipe (with a total area of forest of approximately 500 ha) was surveyed between April and October 2008. Standard line transect procedures were used in the four largest fragments, and additional monitoring included the use of playback broadcasts for the observation of titi groups. The presence of titis was confirmed in all the forest... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189910 Sun, 31 Jul 2011 23:00:00 +0100 5189910 http://www.medworm.com/index.php?rid=5189909&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881781%26dopt%3DAbstract The objectives of our study were: i) to adapt an index of biotic integrity of streams in the Rio Cuiabá Basin and ii) to analyze if the Index of Biotic Integrity (IBI) correlated with the environmental quality measured by the Index of Environmental Quality (IEQ) and with the mesohabitat structure. We sampled 26 streams in sub-basins of the Cuiabá River. In each stream, we closed a stretch of 50 m with blockage nets and used electrofishing to capture fish. To obtain a measure of environmental quality in sampled units, we characterized the stream and its micro basin. For the analyses, we used the Spearman Correlation, Kruskal-Wallis test and Analysis of Multiple Regression. We collected 697 individuals distributed into 6 orders, 15 families and 49 species. The IBI followed changes on envir... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189909 Sun, 31 Jul 2011 23:00:00 +0100 5189909 http://www.medworm.com/index.php?rid=5189908&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881782%26dopt%3DAbstract Authors: Teixeira de Oliveira M, Rocha O, Peret A Abstract The limnological features and the phytoplankton community of the Cachoeira Dourada reservoir were analyzed in December 2006, May 2007 and November 2007. Temporal changes in the taxonomic composition, density, diversity and dominance of species were analyzed in relation to climatic factors and the physical and chemical characteristics of the water. A positive correlation was found between some of the physical and chemical variables and the phytoplankton community. According to the CCA, variables such as the extent of the euphotic zone, temperature, pH, nitrogen and phosphorus concentrations directly affected the phytoplankton dynamics. Organisms belonging to the class Cyanophyceae were the most representative in all the samp... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189908 Sun, 31 Jul 2011 23:00:00 +0100 5189908 http://www.medworm.com/index.php?rid=5189907&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881783%26dopt%3DAbstract Authors: Affonso A, Barbosa C, Novo E Abstract Assurance of water quality for human consumption is essential for public health policies. In the Amazon floodplain, the seasonal water level variation causes periodic flooding of marginal areas that are usually used for settlements, agriculture and livestock. Therefore, the exchange of materials between the terrestrial and aquatic ecosystem affects the proportion of suspended and dissolved components in water and its physical-chemical characteristics, and consequently the quality of the water used by local people. Following this approach, the aim of this study is to evaluate changes in water quality in Lago Grande de Curuaí floodplain, Óbidos, Pará in response to the flood pulse, during one hydrological year from 2003 to 2004, based... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189907 Sun, 31 Jul 2011 23:00:00 +0100 5189907 http://www.medworm.com/index.php?rid=5189906&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881784%26dopt%3DAbstract Authors: Rodrigues L, Araujo A Abstract The temporal and spatial resource use among hummingbirds was studied over 13 months in an urban forest remnant (Prosa State Park: PSP) in Campo Grande, Mato Grosso do Sul, Brazil. Hummingbird visitation was recorded at three ornithophilous and eleven non-ornithophilous species. Flower density was roughly constant during the study period, with the density of non-ornithophilous flowers being higher than that of ornithophilous ones. Mean values of nectar volume and concentration were similar between ornithophilous and non-ornithophilous species. Eight hummingbird species were observed at PSP: Amazilia fimbriata, Anthracothorax nigricollis, Chlorostilbon lucidus, Eupetomena macroura, Hylocharis chrysura, Florisuga fusca, Thalurania furcata and an... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189906 Sun, 31 Jul 2011 23:00:00 +0100 5189906 http://www.medworm.com/index.php?rid=5189905&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881785%26dopt%3DAbstract Authors: Mesquita R, Azevedo R, Abdallah V, Luque J Abstract Sixty specimens of singing catfish Trachelyopterus striatulus (Steindachner, 1877) (Siluriformes: Auchenipteridae) collected from Guandu River (22º 48' 32" S and 43º 37' 35" W), in the state of Rio de Janeiro, Brazil from October 2006 to March 2009, were necropsied to study their parasites. From the 60 specimens of T. striatulus examined 57 were parasitised by at least one parasite species. The majority of the parasite specimens collected were monogeneans followed by Nematoda, Digenea and Hirudinea. Cosmetocleithrum sp. was the numerically predominant species with highest prevalence and abundance. The parasites of T. striatulus showed the typical pattern of aggregated distribution. No parasite species showed significant... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189905 Sun, 31 Jul 2011 23:00:00 +0100 5189905 http://www.medworm.com/index.php?rid=5189904&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881786%26dopt%3DAbstract Authors: Troncon E, Avelar W Abstract The aim of this work was to register the occurrence of Anodontites tenebricosus (Bivalvia: Mycetopodidae) in the Sapucaí river basin, municipality of São Joaquim da Barra, São Paulo state, Brazil, associating its occurrence to the environment in which they are found, besides providing conchological data to contribute to the identification of the species. Fifty one specimens of Anodontites tenebricosus were studied regarding their conchological and morphometrical aspects. Strong correlations were found between the morphometric variables, the correlation between 'length and height of the shell' being the most significant. The characteristics of the shells of A. tenebricosus found in the Sapucaí river basin resemble the descriptions of the spe... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189904 Sun, 31 Jul 2011 23:00:00 +0100 5189904 http://www.medworm.com/index.php?rid=5189903&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881787%26dopt%3DAbstract Authors: Maroneze D, Tupinambás T, França J, Callisto M Abstract Dams are a major threat to aquatic biological diversity. By altering the natural flow of rivers, dams modify fluvial habitats, making them unsuitable for the growth and reproduction of many aquatic species. The aim of this study was to evaluate the effects of a reduced flow reach (RFR) on benthic macroinvertebrate communities. Benthic macroinvertebrates were collected at six sites downstream of the Amador Aguiar Power Plant I before (lotic phase) and after (semi-lentic phase) Araguari River mean flow was reduced from 346 to 7 m³.s-1. Changes in macroinvertebrates richness, diversity and total biomass were not observed. Ablabesmyia, Tanytarsus (Chironomidae, Diptera), Leptoceridae and Polycentropodidae (Trichoptera)... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189903 Sun, 31 Jul 2011 23:00:00 +0100 5189903 http://www.medworm.com/index.php?rid=5189902&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881788%26dopt%3DAbstract This study describes the diet and resource partitioning among anurans inhabiting irrigated rice fields in the Pantanal region. Twenty categories of prey were found in the stomachs of Leptodactylus chaquensis, L. elenae, L. podicipinus and Rhinella bergi, the most frequent being Coleoptera, Hymenoptera, larvae of Hexapoda, Hemiptera, Diptera and Orthoptera. The great differences found in the diet of these species in rice fields compared to other locations, according to available records in the literature, was the increased importance of Hemipitera and Orthoptera and the decrease in importance of Hymenoptera in the diet of leptodactylids. These differences might be attributed to changes in the availability of resources in response to habitat modification. Although diet composition was very s... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189902 Sun, 31 Jul 2011 23:00:00 +0100 5189902 http://www.medworm.com/index.php?rid=5189901&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881789%26dopt%3DAbstract This study aimed to characterise the Mugil curema fisheries thereby underpinning the management of the species in the region. The study was developed with data collected from landings in the town of Cananéia, São Paulo state, Brazil, from 1995 to 2009. Production data, fishing effort and CPUE were used to assess the evolution of captures. The gillnets were characterised by interviewing fishermen from 16 communities in Cananéia. White mullet fishery has aroused the interest of fishermen in the region since the 80s and today it is one of the main products of artisanal estuarine fishery off the south coast of São Paulo. The major landings occur in the warmer months with fish traps and gillnets being the main fishing gear used. The largest catches occur in the spawning months of the specie... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189901 Sun, 31 Jul 2011 23:00:00 +0100 5189901 http://www.medworm.com/index.php?rid=5189900&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881790%26dopt%3DAbstract Authors: Marins R, Paula Filho F, Eschrique S, Lacerda L Abstract This paper estimates annual P emission to the Jaguaribe River estuary, NE Brazil, responsible for approximately 30% of the country's farmed shrimp production. Emissions increased three times between 2001 and 2006 and reached 43.9 t.year-1. These emissions make aquaculture the third main source of P for this estuary and are much smaller than emissions from agricultural sources and slightly lower than emissions from wastewater. Their relative contribution also increased from 10.5% to 20.5%. Temporal variability of P concentrations in estuarine bottom sediments also suggest an increase, but not as evident as the emissions. The spatial distribution and speciation of P (total P and inorganic P) in sampling stations locate... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189900 Sun, 31 Jul 2011 23:00:00 +0100 5189900 http://www.medworm.com/index.php?rid=5189899&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881791%26dopt%3DAbstract Authors: Luz J, Boehs G Abstract The aim of this study was to characterize the reproductive cycle of Anomalocardia brasiliana, typical of the estuarine region of the Cachoeira River, Ilhéus, Bahia, Brazil. For this purpose, 20 specimens were collected biweekly between August 2005 and August 2006 on an intertidal bank (14º 48' 23" S and 39º 02' 47" W). The animals were measured on the anteroposterior axis (length), examined macroscopically and removed from the shell and fixed in Davidson's solution. Subsequently, the tissues were impregnated in paraffin, cut into 7 mm sections and stained with Harris hematoxylin and eosin (HE). The slides were examined under a light microscope. The water temperature at the site ranged from 24 to 30.5 ºC (mean: 27.4 ºC; SD ± 1.9), salinity from... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189899 Sun, 31 Jul 2011 23:00:00 +0100 5189899 http://www.medworm.com/index.php?rid=5189898&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881792%26dopt%3DAbstract Authors: Praxedes P, Zerlin J, Dias L, Pessoni R Abstract A novel antifungal protein with a molecular mass around 50 kDa was purified from seeds of Sesbania virgata (Cav.) Pers. using ammonium sulfate fractionation followed by gel filtration on a Sephadex G-75 Superfine (Sigma) column and reverse-phase high performance liquid chromatography on a C8 column. The protein, designated FP1-A, with a novel N-terminal sequence AMVHSPGG(S)FS(P), showed growth inhibitory activity of filamentous fungi Aspergillus niger, Cladosporium cladosporioides, Colletotrichum gloeosporioides and Fusarium solani. PMID: 21881792 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189898 Sun, 31 Jul 2011 23:00:00 +0100 5189898 http://www.medworm.com/index.php?rid=5189897&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881793%26dopt%3DAbstract In conclusion, cryopreservation of semen of B. orbignyanus increased the percentage of secondary abnormalities and decreased the spermatic motility and vigor. PMID: 21881793 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189897 Sun, 31 Jul 2011 23:00:00 +0100 5189897 http://www.medworm.com/index.php?rid=5189896&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881794%26dopt%3DAbstract Authors: Tozzi H, Takaki M Abstract In the present work, we analyzed the histochemical aspects of Passiflora edulis seeds reserve mobilization during the first ten days of germination. Our results showed that mainly lipids present in the endosperm are used as a reserve source, and their levels reduce at the same time the radicle protrudes, between the fourth and sixth day of sowing. Furthermore, protein bodies are present in the cotyledons, which are degraded as germination occurs and are almost depleted by the time of radicle protrusion. Starch grains also appear in the late germination period, and it is not clear if there is any reserve wall polysaccharide consumption in the endosperm. PMID: 21881794 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189896 Sun, 31 Jul 2011 23:00:00 +0100 5189896 http://www.medworm.com/index.php?rid=5189894&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881795%26dopt%3DAbstract In this study, conducted in a Cerrado area located on a farm in the city of Silvânia, GO, the following hypothesis was tested: the greater the isolation degree of a plant, the lower its fruit production due to access difficulties for pollinators. Using a linear regression analysis, it was possible to relate the fruiting rate with the degree of isolation of each B. coccolobifolia individual and consequently it was found that the isolation had no influence on the pollination rate, an unexpected event that can be explained by the distance amongst individuals not being large enough to limit the movement of pollinators, or because cross-pollination was not the predominant form of reproduction, since the rate of cross-pollination was similar to self-pollination. It was also found that the propo... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189894 Sun, 31 Jul 2011 23:00:00 +0100 5189894 http://www.medworm.com/index.php?rid=5189892&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881796%26dopt%3DAbstract This study evaluated seasonality in hematological parameters of Nile tilapia cultured in the state of Santa Catarina, southern Brazil. A total of 240 fish were examined during four seasons between April 2007 and March 2008 in three different fish farms. After being anesthetised in a benzocaine solution, blood samples were withdrawn into syringes containing a drop of 10% EDTA for hematological analysis. The results were compared between fish farms and seasons, which are well delimited in southern Brazil. In a traditional fish farm in Joinville in the summer, there was an increase in the percentage of hematocrit and in the red blood cell count. The highest values of total leukocytes were found in fish from fee-fishing in Blumenau in the autumn while the lowest values occurred in those from s... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189892 Sun, 31 Jul 2011 23:00:00 +0100 5189892 http://www.medworm.com/index.php?rid=5189891&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881797%26dopt%3DAbstract Authors: Bastos E, Santana R, Calaça-Costa A, Thiago P Abstract In Minas Gerais, green propolis is produced from the collection of resinous substance found in shoot apices of Baccharis dracunculifolia. The aim of this study was to evaluate the biological parameters associated with the interaction Apis mellifera x Baccharis dracunculifolia, to elucidate the supply of resin for green propolis production in Minas Gerais. We selected male and female individuals of two populations of Baccharis dracunculifolia located on São Judas Tadeu Farm - FSJT, in the municipality of Betim, MG and the Experimental Garden of the Ezequiel Dias Foundation - HORTO, located in an urban area in Belo Horizonte, MG. We made weekly observations, from June 2007 to June 2008, and evaluated in both population... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189891 Sun, 31 Jul 2011 23:00:00 +0100 5189891 http://www.medworm.com/index.php?rid=5189890&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881798%26dopt%3DAbstract Authors: Penteado-Dias A, Fernandes L, Iemma L, Dias M Abstract Protapanteles (Protapanteles) enephes (Nixon, 1965) (Hymenoptera, Braconidae, Microgastrinae) was reared from the host Fountainea ryphea phidile (Geyer, 1837) (Lepidoptera, Nymphalidae, Charaxinae), collected on Croton floribundus Spreng. (Euphorbiaceae) in São Carlos, São Paulo state, Brazil. The hyperperparasitoids Conura sp. (Hymenoptera, Chalcididae) and a Pteromalidae species are registered on this microgastrine species. Male and female specimens and cocoon of Protapanteles (Protapanteles) enephes are illustrated for the first time. PMID: 21881798 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189890 Sun, 31 Jul 2011 23:00:00 +0100 5189890 http://www.medworm.com/index.php?rid=5189889&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881799%26dopt%3DAbstract Authors: Costa L, Esbérard C Abstract Since the 1990s, attacks by hematophagous bats on humans and domestic animals have been reported both on the continent and on the islands on the southern coast of Rio de Janeiro state. The density of vampire bats was investigated based on percentage of captures during control of Desmodus rotundus samplings and during bat diversity research. In the present work, 203 individuals of D. rotundus were captured from 1993 to 2009, which corresponds to 11.88% of all bat captures carried out for species control in local villages and 1.58% of all captures in faunistic inventories. The density of D. rotundus is high even on the recently occupied islands where domestic animals have been introduced. It is probable that this species dispersed from the conti... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189889 Sun, 31 Jul 2011 23:00:00 +0100 5189889 http://www.medworm.com/index.php?rid=5189888&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881800%26dopt%3DAbstract We examined the post-embryonic development of the male and female genital apparatus of the brown spider, Loxosceles intermedia. The development of the genital apparatus for both sexes begins with the appearance of inner structures. In the male genital apparatus, formation of the testes occurs first, followed by differentiation of the duct, ampulla and vas deferens, and finally the formation of the genital opening and differentiation of the copulatory organ (secondary sexual characteristic). Similarly, the development of the female genital apparatus begins with the formation of the ovaries, followed by the appearance of oocytes in vitellogenesis, then the development of oviducts and uterus internus and, finally, the spermatheca. These data may be very important in further comparative studie... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189888 Sun, 31 Jul 2011 23:00:00 +0100 5189888 http://www.medworm.com/index.php?rid=5189887&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881801%26dopt%3DAbstract Authors: Kotas J, Mastrochirico V, Petrere Junior M Abstract Age and growth studies for the scalloped hammerhead shark, Sphyrna lewini (Griffith and Smith, 1834) caught along the southern Brazilian coast, were based on ring measurements of vertebrae sections of 115 males, 116 females and 14 unknown sexed sharks between 48 and 344 cm total length (TL). The von Bertalanffy growth models were best fit using back-calculated data. The growth parameters obtained for males, were L∞ = 266 cm; K = 0.05/year; L0 = 47 cm. For females, L∞ = 300 cm; K = 0.05/year; L0 = 51 cm. An adult female reached 217 cm TL and was 31.5 years old. On the other hand, an adult male was 29.5 years old and measured 234 cm TL. Longevity estimate for males and females was 55 years. Therefore, S. lewini is a lon... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189887 Sun, 31 Jul 2011 23:00:00 +0100 5189887 http://www.medworm.com/index.php?rid=5189886&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881802%26dopt%3DAbstract Authors: Villares Junior G, Gomiero L, Goitein R Abstract Four biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females. P... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189886 Sun, 31 Jul 2011 23:00:00 +0100 5189886 http://www.medworm.com/index.php?rid=5189885&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881803%26dopt%3DAbstract Authors: Carvalho A, Luque J Abstract This work aimed to study the temporal variation of metazoan parasites of Trichiurus lepturus from the coastal zone of Rio de Janeiro, Brazil. Between July 2006 and June 2007, there were four seasonal quarterly samples of 30 specimens of T. lepturus. In addition to a group composed of anisakid larvae, we collected a total of 14 species of metazoan parasites: five digenean; five monogenean, two cestode larvae, one acanthocephalan larvae; and one copepod. With the exception of Lecithochirium microstomum and Lecithochirium sp., all species showed peaks of prevalence and abundance especially those fishes collected in summer, which may indicate a seasonal variation of these parasites in T. lepturus from the coast of Rio de Janeiro. PMID: 21881803... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189885 Sun, 31 Jul 2011 23:00:00 +0100 5189885 http://www.medworm.com/index.php?rid=5189884&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881804%26dopt%3DAbstract Authors: Feitosa C, Freitas R, Luz N, Bezerra M, Trevisan M Abstract A microplate assay and a thin-layer chromatography (TLC) "in situ" assay based on the Ellman assay was used to screen for acetylcholinesterase inhibitors from ethyl acetate and methanol extracts of Brazilian medicinal plants of families that, according to the literature, have traditional uses that might be connected with acetylcholinesterase inhibition. Eighteen species belonging to Convolvulaceae, Crassulaceae, Euphorbiaceae, Leguminosae, Malvaceae, Moraceae, Nyctaginaceae and Rutaceae families were tested. The most active plants were Ipomoea asarifolia (IC50 = 0.12 mg/mL), Jatropha curcas (IC50 = 0.25 mg/mL), Jatropha gossypiifolia (IC50 = 0.05 mg/mL), Kalanchoe brasiliensis (IC50 = 0.16 mg/mL) and Senna alata (... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189884 Sun, 31 Jul 2011 23:00:00 +0100 5189884 http://www.medworm.com/index.php?rid=5189883&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881805%26dopt%3DAbstract This study describes the parasitic fauna of Oxydoras niger from the Coari Lake, tributary of the medium Solimões River, State of Amazonas, Brazil, and the relationship between the number of Monogenoidea and the condition factor. From a total of 27 examined fish, 70.3% were parasitised by at least one parasite species as follows: Ichthyophthirius multifiliis (Protozoa), Chilodonella sp. (Protozoa), Cosmetocleithrum gussevi, C. confusus, C. parvum and Cosmetocleithrum sp. (Monogenoidea), Paracavisona impudica (Acanthocephala), Cucullanus grandistomis (Nematoda), Proteocephalus kuyukuyu (Cestoda) and Dadaytrema sp. (Digenea). Monogenoidea helminthes were the most prevalent parasite when compared to protozoan and intestinal helminthes. This study showed that O. niger has a great parasite dive... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189883 Sun, 31 Jul 2011 23:00:00 +0100 5189883 http://www.medworm.com/index.php?rid=5189882&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21881806%26dopt%3DAbstract Authors: Sousa F, Elmoor-Loureiro L, Souza M PMID: 21881806 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5189882 Sun, 31 Jul 2011 23:00:00 +0100 5189882 http://www.medworm.com/index.php?rid=5041249&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755149%26dopt%3DAbstract Authors: PMID: 21755149 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041249 Sat, 30 Apr 2011 23:00:00 +0100 5041249 http://www.medworm.com/index.php?rid=5041248&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755150%26dopt%3DAbstract Authors: Oliveira-Rebouças P, Gimenes M Comolia ovalifolia DC Triana (Melastomataceae) and Chamaecrista ramosa (Vog.) H.S. Irwin and Barneby var. ramosa (Leguminosae - Caesalpinioideae) are tropical plant species found in restinga (herbaceous-shrubby, sandy costal ecosystems). They have flowers with poricidal anthers and are pollinated by bees. The study sought to analyse potential pollinators of both plants during visits to their flowers in a restinga area in Bahia. The flowering displayed by both species was considered continuous and long duration, constantly providing pollen to floral visitors. C. ovalifolia was visited by 17 species of bees and C. ramosa by 16 species, predominantly from the Apidae family (with a similarity index of 74%). The behavior displayed by these visiting b... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041248 Sat, 30 Apr 2011 23:00:00 +0100 5041248 http://www.medworm.com/index.php?rid=5041243&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755151%26dopt%3DAbstract Authors: De Los Ríos-Escalante P, Hauenstein E, Romero-Mieres M The zooplankton assemblages in Chilean Patagonian lakes are characterised mainly by their low biodiversity and high predominance of calanoids copepods, a pattern that has been studied for large and deep lakes between 38-51° S, and shallow ponds at 51° S. The aim of the present study was analyse the zooplankton assemblages in different water bodies located in coastal zones, middle valleys and mountain zones between 37-39° S. For this purpose, the following variables were considered: maximum depth, latitude, altitude, chlorophyll-a and species number, and to these variables, a Principal Component Analysis (PCA) was applied. A co-occurrence null model analysis was also applied for determining the existence of a random pro... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041243 Sat, 30 Apr 2011 23:00:00 +0100 5041243 http://www.medworm.com/index.php?rid=5041241&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755152%26dopt%3DAbstract This study is the first survey regarding crab spiders and their associations with plant species of the "Cerrado". PMID: 21755152 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041241 Sat, 30 Apr 2011 23:00:00 +0100 5041241 http://www.medworm.com/index.php?rid=5041239&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755153%26dopt%3DAbstract Authors: Jerônimo G, Speck G, Cechinel M, Gonçalves E, Martins M A total of 240 Nile tilapia were examined between April 2007 and March 2008, gathered from three different fish farms, 20 fish in each fish farm, in the four seasons of the year. Fish ponds were located in Joinville, Blumenau and Ituporanga, Santa Catarina state, Brazil and each pond had a different culture system. Prevalence, mean intensity, mean abundance and mean relative dominance were compared among fish ponds and seasons. During this period, the water quality was kept in normal values. Piscinoodinium pillulare (Dinoflagellida) was the most dominant parasite followed by Trichodina magna e T. compacta (Ciliophora), Cichlydogyrus sclerosus, C halli, C. thurstonae, Scutogyrus longicornis (Monogenoidea), copepodids Ler... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041239 Sat, 30 Apr 2011 23:00:00 +0100 5041239 http://www.medworm.com/index.php?rid=5041238&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755154%26dopt%3DAbstract Authors: Barros M, Fraga E, Birindelli J The Itapecuru is a relatively large river in the northeastern Brazilian state of Maranhão. During several expeditions to this basin, we collected 69 fish species belonging to 65 genera, 29 families and 10 orders. Characiformes and Siluriformes were the orders with the largest number of species and Characidae, Loricariidae, Cichlidae, Auchenipteridae and Pimelodidae were the richest families. About 30% of the fish fauna of the Itapecuru basin is endemic or restricted to northeastern Brazil. Just over a fifth (22%) of the species is also known to occur in the Amazon basin and only a few are more widely distributed in South American. PMID: 21755154 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041238 Sat, 30 Apr 2011 23:00:00 +0100 5041238 http://www.medworm.com/index.php?rid=5041234&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755155%26dopt%3DAbstract Authors: Fagundes C, Di Mare R, Wink C, Manfio D The conservationist community is giving special attention to epigean insects due to their importance in the preservation of terrestrial habitats. This work analysed the diversity, richness, abundance and similarity at the soil surface of Coleoptera composition among five environments: native forest, native grassland, Pinus elliottii plantation, Eucalyptus saligna plantation and degraded area by soil use in southern Brazil, from October 2004 to October 2005. A total of 1,812 individuals were collected, attributed to 45 morph-species and 14 families. The higher richness and abundance were observed in native forest (31 species and 782 individuals) and the lower richness and abundance in degraded area (14 species, 86 individuals). Scarabaeid... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041234 Sat, 30 Apr 2011 23:00:00 +0100 5041234 http://www.medworm.com/index.php?rid=5041233&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755156%26dopt%3DAbstract Authors: Chiba W, Passerini M, Tundisi J Benthic macroinvertebrates have many useful properties that make possible the use of these organisms as sentinel in biomonitoring programmes in freshwater. Combined with the characteristics of the water and sediment, benthic macroinvertebrates are potential indicators of environmental quality. Thus, the spatial occurrence of potentially toxic metals (Al, Zn, Cr, Co, Cu, Fe, Mn and Ni) in the water, sediment and benthic macroinvertebrates samples were investigated in a sub-basin in the southeast of Brazil in the city of São Carlos, São Paulo state, with the aim of verifying the metals and environment interaction with benthic communities regarding bioaccumulation. Hypothetically, there can be contamination by metals in the aquatic environment in... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041233 Sat, 30 Apr 2011 23:00:00 +0100 5041233 http://www.medworm.com/index.php?rid=5041232&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755157%26dopt%3DAbstract Towards testing the "honeycomb rippling model" in cerrado. Braz J Biol. 2011 May;71(2):401-8 Authors: Gonçalves C, Batalha M Savannas are tropical formations in which trees and grasses coexist. According to the "honeycomb rippling model", inter-tree competition leads to an effect of trees growing and dying due to competition, which, at fine spatial scale, would resemble honeycomb rippling. The model predicts that the taller the trees, the higher the inter-tree distances and the evenness of inter-tree distances. The model had been corroborated in arid savannas, in what appears to be caused by uneven distribution of rains, but had not yet been tested in seasonal savannas, such as the cerrado, which could be caused by the irregular occurrence of fire.A basic assumption of the mod... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041232 Sat, 30 Apr 2011 23:00:00 +0100 5041232 http://www.medworm.com/index.php?rid=5041229&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755158%26dopt%3DAbstract The objective of this study was to assess the effects of bioaugmentation on some parameters of organic matter and on the performance of juvenile tilapias in an intensive aquaculture production system. The combination of two bacterial consortiums in a complete randomized design was employed in a factorial analysis with two factors. Statistical differences between treatments were analyzed by the analysis of variance (ANOVA) and Tukey test at the 5% level. One of the treatments, heterotrophic bacterial supplementation, was able to reduce biochemical oxygen demand (BOD) by 23%, dissolved organic carbon (DOC) by 83.7% and phytoplanktonic biomass by 43%. On the other hand, no damage was done to either the physical-chemical indicators of water quality or to the growth performance of juvenile tila... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041229 Sat, 30 Apr 2011 23:00:00 +0100 5041229 http://www.medworm.com/index.php?rid=5041228&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755159%26dopt%3DAbstract Authors: Silva I, Pereira A, Barros I We have investigated how edge effects influence the fern community of Jaguarão Forest (08º 35' 49" S and 35º 15' 39" W), located in the district of Rio Formoso, Pernambuco, Brazil. A comparative analysis was made of the interior and edge of the fragment of forest, regarding the richness, abundance and diversity of ferns in the two areas. Six plots of 10 × 20 m were chosen, three in each area. A total of 381 ferns were recorded, which were distributed among 25 species, 17 genera and 12 families. The two areas (edge and interior) were found to differ, with distinct relative air humidities and temperatures (p = 0.00254 and p = 0.00019, respectively). The interior showed higher diversity (t = 7.251 and p = 0.018) and richness (t = 6.379 and p = 0.0... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041228 Sat, 30 Apr 2011 23:00:00 +0100 5041228 http://www.medworm.com/index.php?rid=5041227&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755160%26dopt%3DAbstract The objective was to determine the thermal requirements and estimate the number of generations of P. elaeisis in different Eucalyptus plantations regions. After 24 hours in contact with the parasitoid, the pupae was placed in 16, 19, 22, 25, 28 and 31 °C, 70 ± 10% of relative humidity and 14 hours of photophase. The duration of the life cycle of P. elaeisis was reduced with the increase in the temperature. At 31 °C the parasitoid could not finish the cycle in T. arnobia pupae. The emergence of P. elaeisis was not affected by the temperature, except at 31 °C. The number of individuals was between six and 1238 per pupae, being higher at 16 °C. The thermal threshold of development (Tb) and the thermal constant (K) of this parasitoid were 3.92 °C and 478.85 degree-days (GD), respectively... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041227 Sat, 30 Apr 2011 23:00:00 +0100 5041227 http://www.medworm.com/index.php?rid=5041226&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755161%26dopt%3DAbstract Authors: Suriani-Affonso A, França R, Marchese M, Rocha O The Oligochaeta forms an important part of the macroinvertebrates inhabiting sediments of lotic ecosystems. It has an important role in the cycling of matter and energy transfer in these environments. The aim of this study is to analyse limnological variables, their influence on the structure and diversity of benthic oligochaete taxocenosis in a stretch of the Upper São Francisco River and its tributary the Piumhi River. Samples were taken in two climatic periods, the dry season in October 2006 and 2007 and the rainy season in March 2007 and 2008 at three points along the Piumhi River and six points along the São Francisco River. The sediment of the São Francisco consisted predominantly of sand and clay, whereas the sediment... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041226 Sat, 30 Apr 2011 23:00:00 +0100 5041226 http://www.medworm.com/index.php?rid=5041225&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755162%26dopt%3DAbstract In this study, the occurrence of H. mabouia was determined throughout the island, including the rain forest, restinga and anthropic environments. We used the active search method in points along 19 trails that surround Ilha Grande. At each regular interval of 100 m, we searched for the presence of H. mabouia. The species was recorded in a total of 100 points among the 719 sampled and, in all cases, the occurrence of the lizard corresponded to points located in anthropic or perianthropic areas. As most of Ilha Grande is covered by dense tropical rain forest, we believe this has restricted the invasion of H. mabouia in natural environments within the island. PMID: 21755162 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041225 Sat, 30 Apr 2011 23:00:00 +0100 5041225 http://www.medworm.com/index.php?rid=5041224&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755163%26dopt%3DAbstract This study analysed vertical and temporal variations of cyanobacteria in a potable water supply in northeastern Brazil. Samples were collected from four reservoir depths in the four months; September and December 2007; and March and June 2008. The water samples for the determination of nutrients and cyanobacteria were collected using a horizontal van Dorn bottle. The samples were preserved in 4% formaldehyde for taxonomic analysis using an optical microscope, and water aliquots were preserved in acetic Lugol solution for determination of density using an inverted microscope. High water temperatures, alkaline pH, low transparency, high phosphorous content and limited nitrogen content were found throughout the study. Dissolved oxygen stratification occurred throughout the study period wherea... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041224 Sat, 30 Apr 2011 23:00:00 +0100 5041224 http://www.medworm.com/index.php?rid=5041223&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755164%26dopt%3DAbstract This study aimed to evaluate the environmental quality of surface water of the Maricá Lagoon System through physicochemical, biochemical and microbiological parameters, in order to assess its environmental quality. Marine influence over the system was evidenced by the salinity and temperature gradients, where the most distant point, in Maricá Lagoon, presented the largest protein, lipid and biopolymeric carbon concentrations. Biopolymers, with predominance of lipids, presented a pattern that differs from the literature for coastal sediments. The concentration of thermotolerant coliforms characterised Maricá Lagoon and Boqueirão Channel as unfit for bathing (60.0 and 66.3 cells.mL-1, respectively). The bacterioplankton in the system proved to be predominantly heterotrophic, a consumer o... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041223 Sat, 30 Apr 2011 23:00:00 +0100 5041223 http://www.medworm.com/index.php?rid=5041222&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755165%26dopt%3DAbstract Authors: Pagotto J, Goulart E, Oliveira E, Yamamura C The present study analysed the relationship between morphology and trophic structure of Siluriformes (Pisces, Osteichthyes) from the Caracu Stream (22º 45' S and 53º 15' W), a tributary of the Paraná River (Brazil). Sampling was carried out at three sites using electrofishing, and two species of Loricariidae and four of Heptapteridae were obtained. A cluster analysis revealed the presence of three trophic guilds (detritivores, insectivores and omnivores). Principal components analysis demonstrated the segregation of two ecomorphotypes: at one extreme there were the detritivores (Loricariidae) with morphological structures that are fundamental in allowing them to fix themselves to substrates characterised by rushing torrents, thus... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041222 Sat, 30 Apr 2011 23:00:00 +0100 5041222 http://www.medworm.com/index.php?rid=5041221&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755166%26dopt%3DAbstract Authors: Yashima M, Baldochi A, Rocha O The Conchostraca (clam shrimps) are a group of microcrustaceans found in freshwater habitats. They inhabit the benthos, yet many can swim actively and are often associated with macrophytes. They are filter-feeders, deriving their food from suspended particles or solids stirred up from the bottom. In Brazil, five species have been recorded and the life cycle of one of these, Cyclestheria hislopi (Baird, 1859) was investigated in this study. Specimens were collected from fish-farming tanks in upstate São Paulo and from the floodplain of the Miranda River, in the Mato Grosso swamplands of center-west, Brazil. We determined the following variables: post-embryonic development, duration of life cycle (longevity), mean period between broods, duration o... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041221 Sat, 30 Apr 2011 23:00:00 +0100 5041221 http://www.medworm.com/index.php?rid=5041220&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755167%26dopt%3DAbstract Authors: Cruz L, Ferreira J, Mello M Treatment of human breast epithelial cells MCF-10F with 17-β-estradiol has been reported to result in E2-transformed cells which have given rise to highly invasive C5 cells that in turn generate tumors in SCID mice. From these tumors, various cell lines, among which C5-A6-T6 and C5-A8-T8, were obtained. Although different phases of the tumorigenesis process in this model have been studied in molecular biology and image analysis assays, no cytological data on apoptotic ratios and mitotic abnormalities have been established to accompany the various steps leading to 17-β-estradiol-treated MCF-10F cells to tumorigenesis. Here we detected that the apoptotic ratio decreases with the transformation and tumorigenesis progress, except for the tumor cell li... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041220 Sat, 30 Apr 2011 23:00:00 +0100 5041220 http://www.medworm.com/index.php?rid=5041219&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755168%26dopt%3DAbstract This study aimed to contribute to our knowledge of the parasite-vector interaction associated with Trypanosoma cruzi (Chagas, 1909) infection in Panstrongylus megistus (Burmeister, 1835), an important vector of Chagas' disease in Brazil. The prevalence and intensity of T. cruzi infection, the incidence of metacyclogenesis and the frequency of nuclear phenotypes in Malpighian tubules were investigated in nymphs of P. megistus, reared at 28 °C and subjected to heat shock (40 °C, 1 hour) two days after infection with T. cruzi II (Y strain). Following the 45-day post-infection period, the frequency of epimastigotes was much higher than that of trypomastigotes in both heat-shocked and non-shocked insects, and the prevalence of infection was not altered by heat shock. Fewer epimastigotes and t... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041219 Sat, 30 Apr 2011 23:00:00 +0100 5041219 http://www.medworm.com/index.php?rid=5041218&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755169%26dopt%3DAbstract Authors: Pinheiro T, Battirola L, Marques M Diplopods are very susceptible to various degrees of environmental disturbance, particularly climate, altitude and diet. In order to increase our understanding of millipede ecological plasticity, we used fertility tables to access and to compare the fertility and survival of two populations of the parthenogenetic species Poratia salvator from two areas with distinct characteristics. Collecting was conducted in two localities within the state of Mato Grosso, in the Pantanal of Mato Grosso, municipality of Nossa Senhora do Livramento, and in the municipality of Várzea Grande. The specimens were maintained at room temperature. In the first generation, individuals from the Pantanal of Mato Grosso population reproduced early and also died earlier... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041218 Sat, 30 Apr 2011 23:00:00 +0100 5041218 http://www.medworm.com/index.php?rid=5041217&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755170%26dopt%3DAbstract Authors: Nascimento A, Penteado-Dias A Chelonus (Microchelonus) murici sp. nov. (Hymenoptera: Braconidae: Cheloninae) is described in this work. It was reared from an unknown host in murici fruits, Byrsonima verbascifolia (L.) Rich. ex A. L. Juss. (Malpighiaceae), a species from the Brazilian savannah whose fruits are widely consumed by the population in northern Brazil. The adult of this new species is illustrated. PMID: 21755170 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041217 Sat, 30 Apr 2011 23:00:00 +0100 5041217 http://www.medworm.com/index.php?rid=5041216&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755171%26dopt%3DAbstract Authors: Silva L, Riani-Costa C, Ramos P, Takahira R Similarly to other reptiles, snakes are ectothermic animals and depend exclusively on the environment for the maintenance of their physiological, biochemical and immunological processes. Thus, changes in biochemical values can be expected due to seasonal influence. Twenty-two adult specimens of Boa constrictor amarali kept in captivity were used. Blood collections were done in two different seasons: winter (July 2004) and summer (January 2005) for the following assays: uric acid, aspartate aminotransferase (AST), glucose, cholesterol, total protein, and serum protein electrophoresis. The mean biochemical results found in summer and winter, respectively, were: 6.3 ± 3.4 and 11.3 ± 6.2 mg/dL for uric acid; 28.7 ± 12.4 and 20.7 ± 16... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041216 Sat, 30 Apr 2011 23:00:00 +0100 5041216 http://www.medworm.com/index.php?rid=5041215&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755172%26dopt%3DAbstract Authors: Maia V, Fernandes S Two new species of gall midges (Diptera, Cecidomyiidae) Dasineura ovalifoliae and Clinodiplosis maricaensis are described based on material from the Barra de Maricá restinga, Maricá, Rio de Janeiro, Brazil. Both species are associated with Erythroxylum ovalifolium Peyr. (Erythroxylaceae). The former is the gall inducer and the latter an inquiline. PMID: 21755172 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041215 Sat, 30 Apr 2011 23:00:00 +0100 5041215 http://www.medworm.com/index.php?rid=5041214&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755173%26dopt%3DAbstract Authors: Dodonov P, Lucena I, Leite M, Silva Matos D Studies of allometry are important in explaining effects of fire and herbivory, for estimating biomass in forests, and so on. There has been extensive research on plant allometry in temperate and tropical forests, showing that plant architecture often adjusts to the elastic similarity model, but not in Brazilian savannas (cerrado). We studied allometry of Dalbergia miscolobium, Diospyros hispida, Erythroxylum suberosum, Miconia albicans, M. ligustroides, Schefflera vinosa, and Xylopia aromatica in a cerrado sensu stricto area that was affected by a fire in August 2006. We expected that the study species would not adjust to any of the allometric models considered common for forest species ("constant stress", "elastic similarity", and ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041214 Sat, 30 Apr 2011 23:00:00 +0100 5041214 http://www.medworm.com/index.php?rid=5041213&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755174%26dopt%3DAbstract Authors: Dias M Euptychia soter Butler, 1877, the type species of Moneuptychia Forster, 1964, is compared to Satyrus paeon Godart, 1824, the type species of Carminda Dias, 1998. The male genitalia and wing design patterns of these species are dealt with. Some additional data from other species from both genera are also presented. The morphological comparisons carried out in this study indicate that Carminda is not a junior synonym of Moneuptychia. Thus, Carminda is revalidated. PMID: 21755174 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041213 Sat, 30 Apr 2011 23:00:00 +0100 5041213 http://www.medworm.com/index.php?rid=5041212&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755175%26dopt%3DAbstract Authors: Souza Filho P, Takaki M Synedrella nodiflora is a weed species that has dimorphic cypselas: winged peripheral and lanceolate shaped central. The aim of this work is to describe the reproductive capability by measuring dimorphic cypselas morphology, imbibition rates and germinative patterns under temperature, light quality and water availability gradients, and compare the plant growth between two light treatments. The central cypselas were lighter, longer and its pappi were more elongated than the peripheral ones, favoring its dispersion. Neither type had deep dormancy and both of them germinated with the same pattern under the optimum conditions. Both cypselas showed higher germinability in temperatures between 25 and 30 °C, under white light and high water availability, alth... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041212 Sat, 30 Apr 2011 23:00:00 +0100 5041212 http://www.medworm.com/index.php?rid=5041211&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755176%26dopt%3DAbstract Authors: Delfino M, Ribeiro S, Furtado I, Anjos L, Almeida W Parasitism of the lizard Tropidurus hispidus by Geckobiella sp. and by larvae of Eutrombicula alfreddugesi was examined in a mountainous area in Chapada do Araripe (07° 16' S and 39° 26' W), southern Ceará State, Brazil. Of the 56 lizards collected (26 females, 27 males, and 3 juveniles), 40 (total prevalence of 71.42%) were infested by mites. Mite-pockets were the sites most heavily infested by E. alfreddugesi larvae, while Geckobiella sp. was found uniformly distributed under scales over the host's entire body. The female specimens of T. hispidus parasitised by E. alfreddugesi had an average infestation rate of 8.57 ± 3.62, 1-27, while the males had an average infestation rate of 11.90 ± 2.63, 1-25. The female specimen... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041211 Sat, 30 Apr 2011 23:00:00 +0100 5041211 http://www.medworm.com/index.php?rid=5041210&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755177%26dopt%3DAbstract This study aimed at the assessment, in the laboratory, of the larval settlement and spat recovery rates of oysters of the species Crassostrea brasiliana using plastic collectors, epinephrine (C9H13NO3 C4H6O6) and shell powder in settlement tanks. Polypropylene was used attached to bamboo frames. The material was chosen due to its pliability - that favours the spat detachment. Two experiments were carried out; the first between February and April 2008, and the second between November and December 2008 at the Marine Mussel Laboratory of Santa Catarina Federal University (Laboratório de Moluscos Marinhos da Universidade Federal de Santa Catarina). In the first experiment, the scratched plastic collectors were tested consorting them with shell powder; on the second, the plastic collectors wer... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041210 Sat, 30 Apr 2011 23:00:00 +0100 5041210 http://www.medworm.com/index.php?rid=5041209&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755178%26dopt%3DAbstract Authors: Gabriel J, Alves H, Do Rosário M, Secatto A, Coutinho L, Macari M PMID: 21755178 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041209 Sat, 30 Apr 2011 23:00:00 +0100 5041209 http://www.medworm.com/index.php?rid=5041208&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755179%26dopt%3DAbstract Authors: Prata-Alonso R, Lemos I, Añez R, Alonso A PMID: 21755179 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041208 Sat, 30 Apr 2011 23:00:00 +0100 5041208 http://www.medworm.com/index.php?rid=5041207&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21755180%26dopt%3DAbstract Authors: Gaiotti M, Pinho J, Grangeiro D PMID: 21755180 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=5041207 Sat, 30 Apr 2011 23:00:00 +0100 5041207 http://www.medworm.com/index.php?rid=4798545&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537595%26dopt%3DAbstract Authors: Alho CJ PMID: 21537595 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798545 Thu, 31 Mar 2011 23:00:00 +0100 4798545 http://www.medworm.com/index.php?rid=4798544&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537596%26dopt%3DAbstract Authors: Mercante MA, Rodrigues SC, Ross JL The present study deals with the inter-relations in the relief which forms the Bacia do Alto Rio Paraguay (BAP) in mid-west Brazil. The overall aim is to discuss the relationship between relief forms and the biodiversity of the Pantanal. The BAP is a natural environmental system with contrasts in two of the compartments on which it is formed: the plateau, the most elevated compartment, highly transformed by human activities, and the plain which forms the Pantanal, which is more preserved and less transformed in relation to productive activities. The analysis was performed based on publications with a geomorphologic focus, examining the different relief units of the BAP and the dynamics of the revealing processes of landscape change which the ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798544 Thu, 31 Mar 2011 23:00:00 +0100 4798544 http://www.medworm.com/index.php?rid=4798543&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537597%26dopt%3DAbstract Authors: Gonçalves HC, Mercante MA, Santos ET The Pantanal hydrological cycle holds an important meaning in the Alto Paraguay Basin, comprising two areas with considerably diverse conditions regarding natural and water resources: the Plateau and the Plains. From the perspective of the ecosystem function, the hydrological flow in the relationship between plateau and plains is important for the creation of reproductive and feeding niches for the regional biodiversity. In general, river declivity in the plateau is 0.6 m/km while declivity on the plains varies from 0.1 to 0.3 m/km. The environment in the plains is characteristically seasonal and is home to an exuberant and abundant diversity of species, including some animals threatened with extinction. When the flat surface meets the pla... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798543 Thu, 31 Mar 2011 23:00:00 +0100 4798543 http://www.medworm.com/index.php?rid=4798542&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537598%26dopt%3DAbstract Authors: Pott VJ, Pott A, Lima LC, Moreira SN, Oliveira AK This is a short review of the state of the art concerning diversity of aquatic macrophytes and the main aquatic vegetation types in the Brazilian Pantanal wetland and upper watershed. There are ca. 280 species of aquatic macrophytes on the Pantanal floodplain, with scarce endemism. On the upper watershed, Cerrado wetlands (veredas) and limestone springs have a distinct flora from the Pantanal, with twice the species richness. As a representative case of aquatic habitats influenced by river flood, some primary data are presented for the Pantanal Matogrossense National Park and associated Acurizal Preserve, analysing the floristic similarity among aquatic vegetation types. We comment on problems of conservation and observe that P... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798542 Thu, 31 Mar 2011 23:00:00 +0100 4798542 http://www.medworm.com/index.php?rid=4798541&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537599%26dopt%3DAbstract Authors: Pott A, Oliveira AK, Damasceno-Junior GA, Silva JS This is a review of current studies in diversity of the flora and main vegetation types in the Brazilian Pantanal. The flora of this wetland, nearly 2,000 species, constitutes a pool of elements of wide distribution and from more or less adjacent phytogeographic provinces, such as Cerrado, dry seasonal forests, Chaco, Amazonia and Atlantic Forest. The most numerous group includes wide-distribution species, mainly herbs, while the second contingent comes from the Cerrado. Endemic plants are rare, numbering only seven. The vegetation of the sedimentary floodplain is a mosaic of aquatics, floodable grasslands, riparian forests, savannas (cerrados), cerrado woodlands, dry forests, and a large area of mono-dominant savannas, and pi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798541 Thu, 31 Mar 2011 23:00:00 +0100 4798541 http://www.medworm.com/index.php?rid=4798540&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537600%26dopt%3DAbstract Authors: Scremin-Dias E, Lorenz-Lemke AP, Oliveira AK The Pantanal is characterised by a diversity of environments with areas ranging from periodic or permanent heavy flooding to areas with low flood levels, and even environments that never flood. Plant species which inhabit the floodplain are distributed in specific niches, with influence of various phytogeographic domains, including the Seasonal Semi-deciduous Forest, Amazon Rainforest, Cerrado and Chaco, as well rocky remnants, with a wide ecological span in their components. In intensely flooded areas, aquatic macrophytes are widely distributed, with their dynamics closely linked to time, depth and extent of flooding. Although the term "Pantanal" suggests a huge swamp-type wetland, water level variation during a seasonal cycle does... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798540 Thu, 31 Mar 2011 23:00:00 +0100 4798540 http://www.medworm.com/index.php?rid=4798539&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537601%26dopt%3DAbstract Authors: Oliveira AK, Oliveira NA, Resende UM, Martins PF A survey on the use of medical plants was carried out in the rural communities of the Rio Negro sub-region of the Pantanal and the raizeiros from Aquidauana and Miranda municipalities, Mato Grosso do Sul, Brazil, in order to recover the ethnobotanical and ethnopharmacological knowledge of these communities. Structured questionnaires were run with the residents of eight farms and 12 raizeiros. The results reveal 25 botanical families, 45 genera and 48 species of medicinal plants used, six of which are indicated for kidney disturbances, six for urinary disturbances, five for inflammation treatment, 13 for stomach aches, 10 for respiratory disturbances, four for treating sprains, four for healing wounds, four as anti-diarrheaic and... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798539 Thu, 31 Mar 2011 23:00:00 +0100 4798539 http://www.medworm.com/index.php?rid=4798538&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537602%26dopt%3DAbstract Authors: Favero S, Souza HA, Oliveira AK The purpose of this study was to evaluate the integrity of two forest fragments in Rio Negro Pantanal sub-region, using coleopterans as environmental indicators. The study was carried out at Santa Emilia Farm in the Rio Negro sub-region, municipality of Aquidauana, Mato Grosso do Sul (19º 30' 18'' S and 55° 36' 45'' W). Two sites were selected, locally denominated as "cordilheiras" (narrow and elongated strands of elevated soil), one with low degree of anthropic disturbance (CL) and the other, currently undergoing restoration process (TD). The sampling sites were determined using a GPS device. Ten pit-fall traps containing water and detergent were used for the specimens sampling, which were screened and identified. Abundance, richness, diversi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798538 Thu, 31 Mar 2011 23:00:00 +0100 4798538 http://www.medworm.com/index.php?rid=4798537&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537603%26dopt%3DAbstract Authors: Alho CJ, Camargo G, Fischer E Different works have registered the number of mammal species within the natural habitats of the Pantanal based on currently known records, with species richness ranging from 89 to 152 of annotated occurrences. Our present list sums 174 species. However, at least three factors have to be emphasised to deal with recorded numbers: 1) to establish the ecotone limit between the floodplain (which is the Pantanal) and its neighbouring domain like the Cerrado, besides the existence of maps recently produced; 2) the lack of intensive surveys, especially on small mammals, rodents and marsupials; and 3) the constant taxonomic revision on bats, rodents and marsupials. Some species are very abundant--for example the capybara Hydrochoerus hydrochaeris and the c... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798537 Thu, 31 Mar 2011 23:00:00 +0100 4798537 http://www.medworm.com/index.php?rid=4798536&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537604%26dopt%3DAbstract Authors: Alho CJ, Fischer E, Oliveira-Pissini LF, Santos CF We studied the bat fauna of the Pantanal floodplain and its surrounding plateaus in Mato Grosso do Sul, Brazil, based on the scientific collection at Universidade Anhanguera-Uniderp and on the Projeto Morcegos do Pantanal data bank at UFMS, comprising 9,037 captures of 56 species recorded from 1994 to 2007. The Pantanal surveys were carried out in the Nhecolândia, Aquidauana, Miranda, and Paraguai sub-regions; the uplands surveys took place in the Maracaju, Bodoquena, and Urucum formations. Bat specimens were mist-netted over 376 nights in 35 sites, predominantly near fruiting trees, bat shelters, and forest patches. In the floodplain 46 species were recorded (n = 6,292 individuals), and 44 species were found in the uplands (... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798536 Thu, 31 Mar 2011 23:00:00 +0100 4798536 http://www.medworm.com/index.php?rid=4798535&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537605%26dopt%3DAbstract Authors: Alho CJ, Mamede S, Bitencourt K, Benites M Land use and human occupation within the natural habitats of the Pantanal have facilitated introduction of invasive species of plants and animals, including domestic species. Exotic species threaten regional biodiversity because they modify ecological community structure, alter natural habitats and affect local biodiversity. An international organisation, the International Union for Conservation of Nature (IUCN), and the Brazilian government, identify invasive species as the third most important threat to biodiversity, following habitat loss and direct effect on species. In addition, exotic species carry pathogens or may function as vectors or reservoirs for diseases that affect regional biota. PMID: 21537605 [PubMed - in process]... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798535 Thu, 31 Mar 2011 23:00:00 +0100 4798535 http://www.medworm.com/index.php?rid=4798534&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537606%26dopt%3DAbstract Authors: Alho CJ, Sabino J The Pantanal's biodiversity constitutes a valuable natural resource, in economic, cultural, recreational, aesthetic, scientific and educational terms. The vegetation plus the seasonal productivity support a diverse and abundant fauna. Many endangered species occur in the region, and waterfowl are exceptionally abundant during the dry season. Losses of biodiversity and its associated natural habitats within the Pantanal occur as a result of unsustainable land use. Implementation of protected areas is only a part of the conservation strategy needed. We analyse biodiversity threats to the biome under seven major categories: 1) conversion of natural vegetation into pasture and agricultural crops, 2) destruction or degradation of habitat mainly due to wild fire, 3... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798534 Thu, 31 Mar 2011 23:00:00 +0100 4798534 http://www.medworm.com/index.php?rid=4798533&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21537607%26dopt%3DAbstract This article discusses future needs and priorities for ecological research, in order to better understand the biome's natural system, to achieve conservation and sustainable use. PMID: 21537607 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4798533 Thu, 31 Mar 2011 23:00:00 +0100 4798533 http://www.medworm.com/index.php?rid=4636811&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437391%26dopt%3DAbstract Authors: Tundisi JG PMID: 21437391 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636811 Tue, 01 Feb 2011 00:00:00 +0100 4636811 http://www.medworm.com/index.php?rid=4636810&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437392%26dopt%3DAbstract Authors: PMID: 21437392 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636810 Tue, 01 Feb 2011 00:00:00 +0100 4636810 http://www.medworm.com/index.php?rid=4636809&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437393%26dopt%3DAbstract Authors: Manhães M, Dias M Spatial distribution and spatial relationships in capture rates of understorey insectivorous birds and density of arthropods were investigated in a patch of upper montane rain forest in Minas Gerais state, southeastern Brazil, from January to December 2004. The composition of the arthropod fauna collected was similar to that reported for other tropical forests, with predominance of Araneae, Coleoptera, Hymenoptera and Hemiptera non-Heteroptera. A total of 26 bird species were captured, among which the more common were Dysithamnus mentalis, Conopophaga lineata, Platyrinchus mystaceus, Basileuterus culicivorus and Sclerurus scansor. Variation in the bird capture rates among sampling net lines were not correlated with arthropod density. Rather, individual analy... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636809 Tue, 01 Feb 2011 00:00:00 +0100 4636809 http://www.medworm.com/index.php?rid=4636808&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437394%26dopt%3DAbstract This study also analysed variations in annual temperature and precipitation in Patagonia. Average temperatures show an increase over the years, although not constantly. Important modifications in precipitation regime in northern Patagonia, triggered by global climatic changes, could be beneficial for the settlement of populations of P. canaliculata in this new area, where precipitation increased enough to reach values similar to those in the southernmost area of distribution of this species. PMID: 21437394 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636808 Tue, 01 Feb 2011 00:00:00 +0100 4636808 http://www.medworm.com/index.php?rid=4636807&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437395%26dopt%3DAbstract The objective of this study was to develop a Benthic Multimetric Index (BMI) to evaluate the water quality in a neotropical catchment in southeastern Brazil. Thirty metrics were evaluated and six were selected to calculate the BMI: family richness, % Oligochaeta, % Chironomidae + Oligochaeta (% CHOL), % EPT (Ephemeroptera, Plecoptera and Trichoptera), % Collector-gatherers, and BMWP-CETEC biotic index. Sampling was carried in triplicate at 21 sampling sites (8 in the river channel and 13 in the tributaries) during 4 annual collecting trips from June 2004 to November 2007, making a total of 945 samples. Scores (5, 3 or 1) were attributed to each chosen metric and were added up to establish the water quality criteria (a score of 6-12 - poor; 13-18 - intermediate; 19-24 - good; and 25-30 - ve... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636807 Tue, 01 Feb 2011 00:00:00 +0100 4636807 http://www.medworm.com/index.php?rid=4636806&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437396%26dopt%3DAbstract Authors: Bianchini I, Cunha-Santino M, Panhota R The kinetics of oxygen consumption related to mineralisation of 18 taxa of aquatic macrophytes (Cyperus sp, Azolla caroliniana, Echinodorus macrophyllus, Eichhornia azurea, Eichhornia crassipes, Eleocharis sp1, Eleocharis sp2, Hetereanthera multiflora, Hydrocotyle raniculoides, Ludwigia sp, Myriophyllum aquaticum, Nymphaea elegans, Oxycaryum cubense, Ricciocarpus natans, Rynchospora corymbosa, Salvinia auriculata, Typha domingensis and Utricularia foliosa) from the reservoir of Piraju Hydroelectric Power Plant (São Paulo state, Brazil) were described. For each species, two incubations were prepared with ca. 300.0 mg of plant (DW) and 1.0 L of reservoir water sample. The incubations were maintained in the dark and at 20 ºC. Periodically... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636806 Tue, 01 Feb 2011 00:00:00 +0100 4636806 http://www.medworm.com/index.php?rid=4636805&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437397%26dopt%3DAbstract Authors: Toledo J, Penha J The increasing release of untreated fish farming effluents into water courses that flow to the Pantanal wetlands in Mato Grosso (Brazil) may drive this ecosystem to eutrophication. Therefore, the growth of Azolla caroliniana Willd. and Salvinia auriculata Aubl. in fish farming effluent and their effect on its quality were evaluated for 48 days in a greenhouse. The results were compared to those obtained in a nutrient rich solution (Hoagland ½ medium). Azolla caroliniana showed lower relative growth rate in fish farming effluent (0.020 d-1) than in Hoagland ½ medium (0.029 d-1). However, S. auriculata grew slightly better in fish farming effluent (0.030 d-1) than in Hoagland ½ medium (0.025 d-1). The species apparently contributed to reduce nitrate and phos... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636805 Tue, 01 Feb 2011 00:00:00 +0100 4636805 http://www.medworm.com/index.php?rid=4636804&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437398%26dopt%3DAbstract We report on the richness of galling insects in the altitudinal wetland forests of Pernambuco State, Northeastern Brazil. We found 80 distinct types of insect galls on 49 species of host plants belonging to 28 families and 35 genera. Most of the galled plant species belong to Nyctaginaceae, Fabaceae, Meliaceae, Sapindaceae and Myrtaceae. The most common gall were spheroid and globoid; most galls were glabrous, predominantly green and with one chamber, and on the leaves. Most galls were induced by Cecidomyiidae (Diptera). The results of this study contribute to existing knowledge richness of galling insects and host-plant diversity in the altitudinal wetland forests of Northeastern Brazil. PMID: 21437398 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636804 Tue, 01 Feb 2011 00:00:00 +0100 4636804 http://www.medworm.com/index.php?rid=4636803&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437399%26dopt%3DAbstract This study concerns the kinetics of bacterial degradation of two fractions (molecular mass) of dissolved organic matter (DOM) released by Microcystis aeruginosa. Barra Bonita Reservoir (SP, Brazil) conditions were simulated in the laboratory using the associated local bacterial community. The extent of degradation was quantified as the amount of organic carbon transferred from each DOM fraction (< 3 kDa and 3-30 kDa) to bacteria. The variation of bacteria morphotypes associated with the decomposition of each fraction was observed. To find the degradation rate constants (kT), the time profiles of the total, dissolved and particulate organic carbon concentrations were fitted to a first-order kinetic model. These rate constants were higher for the 3-30 kDa fraction than for the lighter fra... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636803 Tue, 01 Feb 2011 00:00:00 +0100 4636803 http://www.medworm.com/index.php?rid=4636802&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437400%26dopt%3DAbstract Authors: Santos J, Tavares C, Almeida-Cortez J The Plant Vigor Hypothesis (PVH) predicts an oviposition preference of females and higher offspring performance for insect herbivores on longer and fast-growing plant modules. We tested the PVH predictions by investigating the effects of leaf size of Miconia prasina (Sw.) DC. (Melastomataceae) on the oviposition preference and on the offspring survival of the gall-inducing weevil Prospoliata bicolorata (Coleoptera: Curculionidae). Additionally, we analysed the effects of top-down mortality force on this system. Approximately 83% of the developed galls resulted in adults of P. bicolorata, whereas 17% of the galls successfully induced were killed by natural enemies (top-down effect). Leaves of intermediate size were more abundant while small... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636802 Tue, 01 Feb 2011 00:00:00 +0100 4636802 http://www.medworm.com/index.php?rid=4636801&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437401%26dopt%3DAbstract This study aimed to evaluate the isotopic fractionation and trophic position of three zooplankton species (Notodiaptomus amazonicus, Moina minuta and Bosmina hagmanni) in the Upper Paraná River floodplain. We predict that phytoplankton is the main food resource used by these species. Three zooplankton samples and three phytoplankton samples were taken from each sampling site, with three to four samples collected for each species. The number of individuals for samples varied according to the body size: from 100 to 130 individuals for Notodiaptomus amazonicus; 150 to 200 for Moina minuta; and from 250 to 300 for Bosmina hagmanni. The isotopic values for δ13C and δ15N were determined using mass spectrophotometer. The isotopic fractionation of 13C was performed according to the relationship... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636801 Tue, 01 Feb 2011 00:00:00 +0100 4636801 http://www.medworm.com/index.php?rid=4636800&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437402%26dopt%3DAbstract This study focuses on metals analysis in kidney and liver tissues of Egretta thula which were collected prostrate or newly dead in Coroa Grande mangrove, Sepetiba Bay, Rio de Janeiro, Brazil, between March 2005 and October 2008. Kidney and liver were collected and analysed to evaluate heavy metal pollution. High values and widest range were detected for all metals in liver and kidney tissues. Geometric mean differences from metals concentrations for Zn, Cd, Ni, Pb, Cu, and Cr, respectively, were found in both organs. Results from linear regression analysis were non-significant in kidney (r = -0.79975, P = 0.10428), and in liver (r = -0.53193, P = 0.35618). With ANOVA analysis for metal accumulation differences (kidney*liver), at the 0.05 level, the results were significantly different (F =... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636800 Tue, 01 Feb 2011 00:00:00 +0100 4636800 http://www.medworm.com/index.php?rid=4636799&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437403%26dopt%3DAbstract Authors: Marion C, Vaske-Junior T, Gadig O, Martins Ia The feeding habits of the shortnose guitarfish, Zapteryx brevirostris, were studied based on 382 specimens from the northern São Paulo coast, southeast Brazil. The diet showed a predominance of crustaceans (carideans and amphipods), polychaete annelids, and occasionally small fish, sipunculids, and cephalopods. The diets of males and females were similar; however, differences in the proportion of prey items were found among juveniles, subadults, and adults. Differences in the ingestion of prey items were found during the year, probably influenced by oceanographic parameters, although in general, the species feeds mostly on crustaceans and polychaetes. PMID: 21437403 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636799 Tue, 01 Feb 2011 00:00:00 +0100 4636799 http://www.medworm.com/index.php?rid=4636798&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437404%26dopt%3DAbstract Authors: Bechara I, Destéfano R, Bresil C, Messias C The fungus Metarhizium anisopliae is used on a large scale in Brazil as a microbial control agent against the sugar cane spittlebugs, Mahanarva posticata and M. fimbriolata (Hemiptera., Cercopidae). We applied strain E9 of M. anisopliae in a bioassay on soil, with field doses of conidia to determine if it can cause infection, disease and mortality in immature stages of Anastrepha fraterculus, the South American fruit fly. All the events were studied histologically and at the molecular level during the disease cycle, using a novel histological technique, light green staining, associated with light microscopy, and by PCR, using a specific DNA primer developed for M. anisopliae capable to identify Brazilian strains like E9. The entire ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636798 Tue, 01 Feb 2011 00:00:00 +0100 4636798 http://www.medworm.com/index.php?rid=4636797&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437405%26dopt%3DAbstract Authors: Pinheiro P, Hazin F, Travassos P, Oliveira P, Carvalho F, Rêgo M The rainbow runner, Elagatis bipinnulata, which belongs to the Carangidae family, has a circumtropical distribution. It is found throughout the Atlantic Ocean, from Massachusetts (USA) to Bahia (Brazil). The reproductive biology of the rainbow runner was studied, using specimens captured off the São Pedro and São Paulo Archipelago. From July 1999 to November 2003, a total of 352 fishes were analysed (201 females and 151 males). Fork length (FL) was measured and specimens were gutted for gonads collection. In the laboratory, gonads length, width and weight were measured, and sexes identified macroscopically. Through histological analysis, five different maturation stages were identified for females: immature, m... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636797 Tue, 01 Feb 2011 00:00:00 +0100 4636797 http://www.medworm.com/index.php?rid=4636796&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437406%26dopt%3DAbstract Authors: Neves E, Viana B Previous studies have shown the superior competitive ability of honeybees compared with native bees in the exploitation of floral resources and nesting sites besides their low efficiency in pollinating native plant species. However, there is little evidence of the effect of this invading species on autochthonous plant populations in natural environments. Thus experiments were performed to test the pollination efficiency of honeybees in two species of Jatropha (Euphorbiaceae), J. mollissima (Pohl) Baill. and J. mutabilis (Pohl) Baill., after a single flower visitation. Samplings were carried out between March and April 2006 in a hyperxerophilous shrub-arboreal Caatinga at Estação Biológica de Canudos, Bahia (9º 56´ 34" S, 38º 59´ 17" W), the property of ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636796 Tue, 01 Feb 2011 00:00:00 +0100 4636796 http://www.medworm.com/index.php?rid=4636795&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437407%26dopt%3DAbstract Authors: Lima C, Silva T, Santos L, Nakagaki W, Loyola Y, Resck M, Camilli J, Soares E, Garcia J Alcohol consumption compromises bone tissue, and thus may either impair or stop the fixation and maintenance of osseointegrated implants. To evaluate the effects of 5% and 15% ethanol on bone neoformation around porous hydroxiapatite implants. Fifteen rats were separated into 3 groups of 5 animals each: control (CT); 5% alcohol (A); and 15% alcohol (AA). After four weeks of ethanol consumption, the rats received porous hydroxiapatite implants into surgically made cavities in the femur. After surgery, the animals continued to consume ethanol until day 90 of the experiment, when they were euthanised and their femurs removed for histological processing. Bone tissue was found around the ceramic... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636795 Tue, 01 Feb 2011 00:00:00 +0100 4636795 http://www.medworm.com/index.php?rid=4636794&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437408%26dopt%3DAbstract Authors: Mossi A, Cansian R, Paroul N, Toniazzo G, Oliveira J, Pierozan M, Pauletti G, Rota L, Santos A, Serafini L The aim of this work is to assess the morphological characteristics and parameters of biomass production, such as fresh and dry matter weight (FMW and DMW, g/plant), yield of dry matter (YDM) in terms of ton/ha, essential oil content (EOC, mL/100 g) and yield of essential oils (YEO) expressed as L/ha of the following plants Salvia verbenaca, Salvia argentea, Salvia lavandulifolia, Salvia pratensis, Salvia sclarea, Salvia triloba and Salvia officinalis. Except for Salvia argentea (S2) all other species have adapted to the south Brazilian climate conditions, with morphological differences among the species evaluated. In terms of DMW and YDM, S. officinalis was found to be t... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636794 Tue, 01 Feb 2011 00:00:00 +0100 4636794 http://www.medworm.com/index.php?rid=4636793&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437409%26dopt%3DAbstract This study describes the accumulation of Hg and metallothionein gene expression in Litopenaeus vannamei Boone, 1931 with aquafeeds as the major source of Hg. Trials were conducted under controlled conditions in experimental tank facilities with high (indoor tanks) and low (outdoor tanks) Hg aquafeeds concentrations. Aquafeeds were the sole source of Hg for the shrimps and concentrations varied from 5.4 to 124 ng.g-1 d.w.. In the three animal fractions analysed; muscle (6,3 - 15,9 ng.g-1); hepatopancreas (5,1 - 22,0 ng.g-1) and exoskeleton (3,0 - 16,2 ng.g-1), Hg concentrations were significantly lower in the outdoor trials submitted to Hg-poor aquafeeds. Maximum shrimp muscle Hg concentrations were low (36.4 ng.g-1 w.w.) relative to maximum permissible concentrations for human consumption ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636793 Tue, 01 Feb 2011 00:00:00 +0100 4636793 http://www.medworm.com/index.php?rid=4636792&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437410%26dopt%3DAbstract Authors: Silva-Souza A, Guardia-Felipi P, Arrebola N The phases of embryonic development of Anodontites trapesialis lasidia are described for the first time. Adult specimens were obtained from two fish farms located in Londrina, Paraná, Brazil. The internal demibranchs of 120 individuals were studied using a routine histological technique; 70 of these carried eggs and/or larvae in the marsupium and were utilized for the description of the phases of embryonic development. The demibranchs of five specimens were evaluated by scanning electron microscopy to detail the morphology of the larvae. Five phases of development were established: phase I, corresponding to the initial stage of cleavage with the formation of apical cells; phase II, including the stages of the morula and blastula; ph... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636792 Tue, 01 Feb 2011 00:00:00 +0100 4636792 http://www.medworm.com/index.php?rid=4636791&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437411%26dopt%3DAbstract Authors: Silva-Souza A, Abdallah V, de Azevedo R, da Silva F, Luque J The current information on the branchiuran Dolops bidentata, a species described more one hundred years ago, is valid but incomplete; hence, an expanded description is given herein. Additional morphological information was obtained by light and scanning electron microscopy from specimens collected on Pygocentrus nattereri from the Poconé Wetland, MT, Brazil. Description of the appendages and other structures such as respiratory area, mouth, details and ornamentation of antennules and maxillae are provided for the first time. PMID: 21437411 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636791 Tue, 01 Feb 2011 00:00:00 +0100 4636791 http://www.medworm.com/index.php?rid=4636790&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437412%26dopt%3DAbstract Authors: Ferreira-Júnior P, Treichel R, Scaramussa T, Scalfoni J The geometric morphometric analysis of the shell of Caretta caretta hatchlings revealed that morphological variations may be related to incubation duration. Based on the overlapping of anatomical landmarks of the carapace and the plastron, it was possible to discriminate hatchlings from slow and fast developing clutches. Carapace and plastron of hatchlings from nests where incubation lasted less than 55 days are rounder as compared to the hatchlings from nests where incubation took 67 days. The differences observed in shell shape in terms of incubation duration were statistically significant, though carapace and plastron shape overlapping was observed in several individuals. Our results indicate that the incubation durat... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636790 Tue, 01 Feb 2011 00:00:00 +0100 4636790 http://www.medworm.com/index.php?rid=4636789&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437413%26dopt%3DAbstract Authors: Rondineli G, Gomiero L, Carmassi A, Braga F The aim of this study was to describe and classify the food preference of fish species in Passa Cinco stream. The grade of feeding preference was applied to stomachs considered replete. This method consists of attributing values to food items found in certain species, according to the participation of each item in the analysed stomach. We analysed 576 full stomachs of 28 species. The autochthonous insects were the main constituents of the diets of these species, and the majority of ingested items classified as occasional. Allochthonous items such as plant debris, seeds and earthworms were associated with higher-order site. Of the total possible combination pairs of species, 29.4% showed high overlap, wich occurred mainly within speci... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636789 Tue, 01 Feb 2011 00:00:00 +0100 4636789 http://www.medworm.com/index.php?rid=4636788&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437414%26dopt%3DAbstract Authors: Melo-Reis P, Bezerra L, Vale M, Canhête R, Chen-Chen L Synadenium umbellatum Pax, popularly known as "cola-nota", is a medicinal plant that grows in tropical regions. The latex of this plant is used against various diseases, such as diabetes mellitus, leprosy, tripanosomiasis, leukemia, and several malignant tumors. The mutagenic, antimutagenic, and cytotoxic effects of the latex of this plant were investigated by measuring the frequency of micronuclei in mice bone marrow cells. To evaluate mutagenicity, the animals were treated with four doses of latex (10, 30, 50, and 100 mg/kg body weight). To study the antimutagenic activity, the animals were simultaneously treated with latex and mitomycin C (4 mg/kg). The cytotoxicity was evaluated by polychromatic and normochromatic ery... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636788 Tue, 01 Feb 2011 00:00:00 +0100 4636788 http://www.medworm.com/index.php?rid=4636787&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437415%26dopt%3DAbstract Authors: Castro C, Nunes J, Penteado-Dias A A new species of Heredius Marsh, 2002 is described from Brazil. H. flavus n. sp. differs from the other known Heredius species by its yellow mesosoma and metasoma, acinose-carinate face, acinose temple, malar space length about 0.56 times eye height, ocello-ocular distance about 4.0 times diameter of the lateral ocellus; acinose-rugose mesoscutal lobes, sternaulus finely scrobiculate and almost complete, and first metasomal tergum with apical width almost equal its length. PMID: 21437415 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636787 Tue, 01 Feb 2011 00:00:00 +0100 4636787 http://www.medworm.com/index.php?rid=4636786&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437416%26dopt%3DAbstract Authors: Flores-Lopes F, Thomaz A The gills of fish have a great external contact surface and are particularly sensitive to chemical and physical changes in the aquatic environment. The aim of this study was to examine the histopathologic alterations in the gills of Astyanax fasciatus and Cyanocharax alburnus and to determine if there is a correlation between the severity of the alterations and environmental degradation and if this biological system can be used as a tool for evaluating water quality in monitoring programmes. The gills of 107 specimens of Astyanax fasciatus and 116 of Cyanocharax alburnus were collected seasonally and processed using routine histologic techniques for fixing and embedding in paraffin and staining of sections with haematoxylin and eosin. The main alterati... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636786 Tue, 01 Feb 2011 00:00:00 +0100 4636786 http://www.medworm.com/index.php?rid=4636785&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437417%26dopt%3DAbstract Authors: Forti L, Tissiani A, Mott T, Strüssmann C The understanding of feeding habits is important for anurans in general, both from an ecological and a phylogenetic perspective. For diurnal poison frogs belonging to the Dendrobatidae family, diet aspects play a crucial role in their defense and survival. Herein, we investigated feeding habits, foraging behaviour, and overall effects of habitat, sex, and body size on the diet of individuals of Ameerega braccata, a poorly known dendrobatid species. Specimens were observed and collected in the type-locality, Chapada dos Guimarães, and in the neighbouring municipality of Cuiabá, both in the State of Mato Grosso, Midwestern Brazil. The most important prey categories for A. braccata were Formicidae, Isoptera, and Acari, whose representa... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636785 Tue, 01 Feb 2011 00:00:00 +0100 4636785 http://www.medworm.com/index.php?rid=4636784&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437418%26dopt%3DAbstract Authors: Vilar J, Ferri P, Chen-Chen L Although the use of medicinal plants or natural products has increased in recent decades all over the world, little information is available on their potential risk to health. Annona crassiflora Mart., a plant commonly known as araticum in Brazil, has been widely used in folk medicine for a long time since its seeds and leaves are often utilised in the treatment of cancer, snake bites, and venereal diseases, its fruits are consumed as tonic and astringent, and its bark powder has anti-fungal and anti-rheumatic properties. To evaluate the genotoxic and mutagenic properties induced by the ethanolic extract of araticum leaves, we performed the prophage λ induction (Inductest) and bacterial mutagenicity assays. We used Escherichia coli WP2s(λ) and R... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636784 Tue, 01 Feb 2011 00:00:00 +0100 4636784 http://www.medworm.com/index.php?rid=4636783&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437419%26dopt%3DAbstract Authors: Araujo C, Penteado-Dias A Two new species of Trieces and Metopius from Brazil are described and illustrated. These new species were found during a large study of the neotropical fauna of Metopiinae with emphasis in the fauna of Brazilian Atlantic Forest (Project BIOTA/FAPESP). Diagnosis and distribution information for each species are provided. PMID: 21437419 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636783 Tue, 01 Feb 2011 00:00:00 +0100 4636783 http://www.medworm.com/index.php?rid=4636782&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437420%26dopt%3DAbstract Authors: Bittencourt-Oliveira M, Oliveira M, Pinto E Microcystis Kützing ex Lemmermann is among the genera of cyanobacteria often associated to toxic blooms with the release of microcystins. A gene cluster codes for microcystin synthetases, which are involved in the biosynthesis of this toxin. The aim of the present study was to investigate the genetic diversity of the mcyB gene, specifically the B1 module, in Brazilian strains of Microcystis spp. and its microcystin variants. Broad genetic diversity was revealed in this region. From the phylogenetic analysis, three clusters were obtained that were not related to the geographic origin or morphospecies of the strains, nor with the variant of the microcystin produced. A group of strains that did not produce microcystins was found, despi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636782 Tue, 01 Feb 2011 00:00:00 +0100 4636782 http://www.medworm.com/index.php?rid=4636781&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437421%26dopt%3DAbstract Authors: Silva R, Fernandes D, Pedroso E, Cividanes F, Perioto N PMID: 21437421 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636781 Tue, 01 Feb 2011 00:00:00 +0100 4636781 http://www.medworm.com/index.php?rid=4636780&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437422%26dopt%3DAbstract Authors: Kuhnen V, Müller de Lima R, Santos J, Graipel M, Machado Filho L, Soriano-Sierra E PMID: 21437422 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636780 Tue, 01 Feb 2011 00:00:00 +0100 4636780 http://www.medworm.com/index.php?rid=4636779&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437423%26dopt%3DAbstract Authors: Maroneze D, Coscarelli D, Vidigal T, Callisto M PMID: 21437423 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636779 Tue, 01 Feb 2011 00:00:00 +0100 4636779 http://www.medworm.com/index.php?rid=4636778&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437424%26dopt%3DAbstract Authors: Giangarelli D, Sofia Sh PMID: 21437424 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636778 Tue, 01 Feb 2011 00:00:00 +0100 4636778 http://www.medworm.com/index.php?rid=4636777&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437425%26dopt%3DAbstract Authors: Sobczak J, Loffredo A, Penteado-Dias A PMID: 21437425 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636777 Tue, 01 Feb 2011 00:00:00 +0100 4636777 http://www.medworm.com/index.php?rid=4636776&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21437426%26dopt%3DAbstract Authors: Negreiros N, Santos R, Silva L, Rocha O, Santos-Wisniewski M PMID: 21437426 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4636776 Tue, 01 Feb 2011 00:00:00 +0100 4636776 http://www.medworm.com/index.php?rid=4519074&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225153%26dopt%3DAbstract Authors: Figueiredo JA, Drumm E, Rodrigues MA, Spilki FR The Rio dos Sinos watershed is located in the eastern region of the state of Rio Grande do Sul and includes 32 municipalities. These municipalities develop several different economic activities such as farming and livestock along the 190 km length of the Rio dos Sinos, one of the rivers with the worst quality of water in Brazil. The region is also characterised by growing urbanisation and heavy industrialisation. The main economic activity is the leather and footwear industry. This diversified land use puts the Rio dos Sinos watershed at risk of a wide range of potential environmental impacts. The aim of the present article is to discuss the socioeconomic process currently implemented in the Rio dos Sinos watershed and the effect... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519074 Wed, 01 Dec 2010 00:00:00 +0100 4519074 http://www.medworm.com/index.php?rid=4519073&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225154%26dopt%3DAbstract Authors: Franz I, Cappelatti L, Barros MP We compared the avifauna recorded in a recent survey in an urban park (Parque Municipal Henrique Luís Roessler, Parcão) and surroundings, Novo Hamburgo, RS, with past data, to evaluate the possible alterations in species composition over time. Of the 265 species compiled as original elements of that region, 114 were found at Parcão. Among forest species, 37% were considered locally extinct. The most affected guild was the large frugivores, with nine extinct species and one survivor (Trogon surrucura). Birds highly sensitive to disturbance as well as endemic species were the most extinguished. The possible causes for this loss are fragmentation, hunting and environmental changes. The diversity today is threatened, thus conservation measures a... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519073 Wed, 01 Dec 2010 00:00:00 +0100 4519073 http://www.medworm.com/index.php?rid=4519072&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225155%26dopt%3DAbstract Authors: Kieling-Rubio MA, Droste A, Windisch PG Regnellidium diphyllum Lindman is a heterosporous fern, growing in aquatic environments and surrounding wetlands, which is assumed to be threatened by increasing water pollution and disappearance of its natural habitats. Among contaminants, hexavalent chromium - Cr(VI) - is known to be present in effluents from some leather tanning factories. Megaspore germination tests were performed using Meyer's solution, at concentrations 0 (control), 0.1, 0.5, 1, 5, 10, 15, 20, 30, 50, and 80 mg.L⁻¹, from a standard solution of Titrisol® 1000 mg.L⁻¹. The primary development of apomictic sporophytes was studied using solutions containing 0.025 to 4.8 mg.L⁻¹ of Cr(VI). The experiments were conducted in a growth chamber at 24 ± 1 ºC and for... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519072 Wed, 01 Dec 2010 00:00:00 +0100 4519072 http://www.medworm.com/index.php?rid=4519071&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225156%26dopt%3DAbstract This study evaluated the in vitro germination and gametophyte development of C. atrovirens under different pH conditions, as well as spore viability after different storage times at 7 ºC. The lowest germination rate of spores was obtained at pH 7.0. At pH 5.0 to 6.5, laminar gametophyte development started at 20 to 30 days of culture. Antheridia and archegonia were first observed at 35 and 128 days, respectively. Storage at 7 ºC did not affect germination rates. The capability of germination at different pH levels may explain the occurrence of the species in a wide range of habitats. The present study contributes to the understanding of the full life-cycle of C. atrovirens and to the analysis of the influence of abiotic components, providing information for the cultivation, management an... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519071 Wed, 01 Dec 2010 00:00:00 +0100 4519071 http://www.medworm.com/index.php?rid=4519070&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225157%26dopt%3DAbstract Authors: Schmitt JL, Goetz MN In the northeastern region of the State of Rio Grande do Sul in Southern Brazil, specifically in the Rio dos Sinos basin, urban parks are an important alternative for the conservation of the remaining natural habitats, as well as for the maintenance and perpetuation of biodiversity. A floristic survey of fern and lycophyte species in the Parque Municipal Henrique Luís Roessler (PMHLR) (29º 41' S and 51º 06' W; alt. 16.4 m) in Novo Hamburgo, (State of Rio Grande do Sul, RS) described their life-forms, as well as substrates and preferential environments. Forty-three species, 30 genera and 15 families were found, 39 of which were ferns. The hemicryptophytes had the highest species richness (26), 17 of which were repent, and nine, rosulate. Most species wer... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519070 Wed, 01 Dec 2010 00:00:00 +0100 4519070 http://www.medworm.com/index.php?rid=4519069&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225158%26dopt%3DAbstract Authors: Pesoa NA, Schulz UH Prochilodus lineatus is a reophilic migratory species of economical importance for local fisheries which is widely distributed in Brazil. The present study investigated diel and seasonal movement patterns, spawning migration and habitat use of P. lineatus in the Sinos River, Southern Brazil. Between August 2002 and March 2004, 19 grumatãs were tagged internally with digitally coded radio transmitters. Tracking was conducted weekly by boat or aircraft, and six fixed data loggers recorded movements of tagged fish. Results showed that the mean distance covered per fish and day was positively related with fish weight (p = 0.03; n = 19). Grumatã showed preference for river streches surrounded by wetlands (p < 0.001; n = 286). Their diel activity pattern dis... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519069 Wed, 01 Dec 2010 00:00:00 +0100 4519069 http://www.medworm.com/index.php?rid=4519068&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225159%26dopt%3DAbstract This study had as aims: (1) to analyse macrophyte and macroinvertebrate diversity in the fragmented wetlands of the Sinos River basin; and (2) to investigate whether wetland areas could work as a tool for selecting the important habitats for biodiversity conservation. Throughout the study, 56 species of macrophytes and 57 taxa of macroinvertebrates were identified. Macrophyte richness was related to the wetland area, but macroinvertebrate richness, however, was not related to the wetland area. The macrophyte and macroinvertebrate composition were not related to the wetland area. Species composition varied between the regions of the basin and the difference in the species composition occurred mainly by the distribution of macroinvertebrates. With regard to the biodiversity conservation of t... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519068 Wed, 01 Dec 2010 00:00:00 +0100 4519068 http://www.medworm.com/index.php?rid=4519067&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225160%26dopt%3DAbstract The objective of this study was to monitor water quality in the Sinos River, the largest river in this basin. Water samples were collected at four selected sites in the Sinos River, and the following parameters were analysed: pH, dissolved oxygen, biochemical oxygen demand (BOD₅), turbidity, fecal coliforms, total dissolved solids, temperature, nitrate, nitrite, phosphorous, chromium, lead, aluminum, zinc, iron, and copper. The results were analysed based on Resolution No. 357/2005 of the Brazilian National Environmental Council (CONAMA) regarding regulatory limits for residues in water. A second analysis was performed based on a water quality index (WQI) used by the Sinos River Basin Management Committee (COMITESINOS). Poor water quality in the Sinos River presents a worrying scenario f... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519067 Wed, 01 Dec 2010 00:00:00 +0100 4519067 http://www.medworm.com/index.php?rid=4519066&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225161%26dopt%3DAbstract Authors: Costa PF, Schulz UH The basin of the Sinos River, located in the northeastern part of Rio Grande do Sul state, Brazil, has been highly impacted by industrial and urban activities. Water quality is low because of domestic and industrial sewage discharges. Most of the tributaries have suffered drastic structural interventions like canalisations and the removal of riparian vegetation. The aims of this study were to: 1) assess the diversity of fish at 34 sampling sites in twenty-four tributaries of the Sinos River basin; 2) quantify impact level by the Shannon-Wiener diversity index and an adapted Index of Biotic Integrity (IBI); and 3) check the interference of environmental impacts, formerly quantified in a Stream Corridor Assessment Survey (SCAS), on the fish assembly and 4) co... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519066 Wed, 01 Dec 2010 00:00:00 +0100 4519066 http://www.medworm.com/index.php?rid=4519065&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225162%26dopt%3DAbstract Authors: Bieger L, Carvalho AB, Strieder MN, Maltchik L, Stenert C Macroinvertebrate communities are one of the most used groups in assessments of water quality, since they respond directly to the level of contamination of aquatic ecosystems. The main objective of this study was the assessment of the water quality of the Sinos River basin (Rio Grande do Sul state, Brazil) through biotic indices based on the macroinvertebrate community ("Family Biotic Index - FBI", and "Biological Monitoring Working Party Score System - BMWP"). Three lower order streams (2nd order) were selected in each one of three main regions of the basin. In each stream, the samplings were performed in three reaches (upper, middle, and lower), totalling 27 reaches. Two samplings were carried in each reach over one y... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519065 Wed, 01 Dec 2010 00:00:00 +0100 4519065 http://www.medworm.com/index.php?rid=4519064&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225163%26dopt%3DAbstract In this study, we used the comet assay to detect genotoxicity due to multiple sources of pollution in the peripheral blood of a native fish species (Hyphessobrycon luetkenii). In addition, we analysed possible DNA damage from aluminum, lead, chromium, copper, nickel, iron and zinc contamination. Water samples were collected seasonally from three sampling sites and the fish were assessed under laboratory conditions. Water chemical analysis showed an increased level of aluminum and iron in most of the samples at sites 2 and 3, located in the middle and lower river course, respectively. The index of DNA damage assessed by the comet assay demonstrated no significant differences in different seasons or at the different sampling sites, while the frequency of cells with DNA damage was higher in w... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519064 Wed, 01 Dec 2010 00:00:00 +0100 4519064 http://www.medworm.com/index.php?rid=4519063&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225164%26dopt%3DAbstract Authors: Rechenmacher C, Siebel AM, Goldoni A, Klauck CR, Sartori T, Rodrigues MT, Rodrigues MA, Gehlen G, Ardenghi PG, Silva LB The aim of this study was to determine the feasibility of combining water quality analysis with different biomarkers to characterise the relationship between anthropogenic contamination and biotic response in the Sinos River, southern Brazil. Wistar rats were studied using three biomarkers combined with physical, chemical and microbiological analysis to assess the effects of pollution at four sampling sites. The induction of oxidative stress was quantified by MDA levels in peripheral blood, lymphocyte DNA damage was determined using the comet assay, and histopathological changes were analysed in the liver. After sampling, animals were allowed to drink the riv... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519063 Wed, 01 Dec 2010 00:00:00 +0100 4519063 http://www.medworm.com/index.php?rid=4519062&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225165%26dopt%3DAbstract Authors: Figueiredo-Sganderla JA, Prodanov CC, Daroit D This case study analysed the impact of the global economy on the environment of the Vale do Rio do Sinos region in southern Brazil. Interviews and questionnaires were used to collect data from social, cultural, economic and political agents in this region, and documents about the tanning industry were reviewed and analysed. Global perspectives and local conditions were brought together to understand the causes and consequences of social, political and economic structures and to evaluate the intrinsic association of the tanning industry with the social, historical and cultural development of the Vale do Rio dos Sinos. The behaviour of the local community, where individuals believe that progress is primordially based on industrial d... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519062 Wed, 01 Dec 2010 00:00:00 +0100 4519062 http://www.medworm.com/index.php?rid=4519061&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21225166%26dopt%3DAbstract Authors: Spilki FR, Tundisi JG The Sinos River Basin is often mentioned as a highly degraded watershed. A series of impacts on water quality, soil and air has been reported in this environment on a recurring basis over the years. This situation of environmental degradation has its origins in a process of huge economic development uncoupled from environmental conservation concerns. The intense consequent urbanization observed for the municipalities within the watershed was not preceded by urban planning proper zoning. The time has arrived for initiatives in scientific research in the Sinos River basin that are applicable to a more efficient and integrated management and recovery of the basin. In this article, a set of targets for research is suggested which the authors consider as the m... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4519061 Wed, 01 Dec 2010 00:00:00 +0100 4519061 http://www.medworm.com/index.php?rid=4318648&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180894%26dopt%3DAbstract Authors: Nabout J, Soares T, Diniz-Filho J, De Marco Júnior P, Telles M, Naves R, Chaves Lj The Brazilian Cerrado is a biome of great biodiversity, but detailed information about the diversity and distribution of species in this region is still insufficient for both testing ecological hypotheses and for conservation purposes. Among native plants in the Cerrado, Dipteryx alata Vogel (commonly known as the "Baru" tree), has a high potential for exploitation. The aims of this paper were to predict the potential spatial distribution of D. alata in the Brazilian Cerrado utilising five different niche modelling techniques. These techniques usually provide distinct results, so it may be difficult to choose amongst them. To adjust for this uncertainty, we employ an ensemble forecasting approa... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318648 Mon, 01 Nov 2010 00:00:00 +0100 4318648 http://www.medworm.com/index.php?rid=4318647&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180895%26dopt%3DAbstract The objective of this study was to assess epipsammic diatom communities in streams in relation to environmental conditions. Epipsammic diatoms and water quality sampling was done at 7 sites during summer base flow period (2008). Forward stepwise multiple regression and canonical correspondence analysis (CCA) were used to determine environmental gradients along which species vary with physical and chemical variables. A total of 112 diatom species distributed among 44 genera were recorded. Altitude and the process of eutrophication played a significant role in structuring diatom communities in the study region. PMID: 21180895 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318647 Mon, 01 Nov 2010 00:00:00 +0100 4318647 http://www.medworm.com/index.php?rid=4318646&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180896%26dopt%3DAbstract Authors: Anhalt F, Azevedo J, Sugayama R, Specht A, Barros N Several insects are harmful to apples grown in Brazil, especially the leafroller Bonagota salubricola (Lepidoptera, Tortricidae), usually controlled with chemical insecticides. The purpose of the present study was to investigate the use of Metarhizium anisopliae strains in the control of the apple leafroller, by assessing their virulence to B. salubricola larvae in bioassays with suspensions of 2 x 10(5) to 2 x 10(9) conidia/mL as well as their relationship with protease expression. The most effective strain underwent a compatibility test with chemical insecticides. The M. anisopliae E6 strain showed a good performance, with up to 88% mortality and a LT50 of 1.66 days. The virulence was positively correlated with a higher enz... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318646 Mon, 01 Nov 2010 00:00:00 +0100 4318646 http://www.medworm.com/index.php?rid=4318645&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180897%26dopt%3DAbstract Authors: Ortêncio Filho H, Reis N, Minte-Vera C Bats may exhibit different patterns of activity, considering aspects concerning niche dynamics as well as the establishment and permanence of the communities in the ecosystems. In this way, the present study analyzed the time and seasonal patterns of activity in different species of frequent phyllostomid bats in remnants of the stational semidecidual forest from the Upper Paraná River, Southern Brazil. Captures were performed between January and December, 2006, using 32 mist nets set above the soil along the nocturnal period during the four seasons of the year. The daily and seasonal patterns of activity of each species was modeled using generalized linear models with Poisson error. The best model was selected using Akaike's Information... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318645 Mon, 01 Nov 2010 00:00:00 +0100 4318645 http://www.medworm.com/index.php?rid=4318644&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180898%26dopt%3DAbstract The objective of this paper is to describe the main characteristics of small-scale marine fisheries in the municipal district of Florianópolis (SC), the capital city of the state of Santa Catarina. We give information about the most captured species, the fishing fleet and fishing gear used. The dynamics of the activity is described, considering the kind of operation of the boats, alongside post-capture procedures. The analyses were accomplished in two types of fishing communities: the one composed of fishers that fish in bays (North and South) and those who fish in the open sea. Numeric differences were observed among these two fishing areas, indicating the existence of two different fleets operating in the area. Differences between the two fishing areas were detected, considering the spe... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318644 Mon, 01 Nov 2010 00:00:00 +0100 4318644 http://www.medworm.com/index.php?rid=4318643&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180899%26dopt%3DAbstract Authors: Sabagh L, Ferreira V, Rocha C We studied the feeding ecology of two Hylinae anurans (Hypsiboas raniceps and Scinax acuminatus), living sympatrically and syntopically in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil. The two hylid species had similar relative mouth width but differed in body size. The diet of the two frog species were composed of arthropodan prey. Both species consumed 11 different prey types, of which seven were common among them. Hypsiboas raniceps had a larger niche breadth (B A = 0.64) than S. acuminatus (B A = 0.48). Trophic niche overlap among frog species was 60.7 %. Our data are suggestive that although for many anurans the diet simply tend to reflect prey availability in the microhabitat, these two frog species, despite sharing similar micr... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318643 Mon, 01 Nov 2010 00:00:00 +0100 4318643 http://www.medworm.com/index.php?rid=4318642&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180900%26dopt%3DAbstract Authors: Filogonio R, Assis V, Passos L, Coutinho M We surveyed populations of the broad-snouted caiman, Caiman latirostris, throughout the São Francisco River basin, from Três Marias reservoir, State of Minas Gerais, to the river delta, at the boarder of Sergipe and Alagoas states. We registered the occurrence of crocodilians in 61% of all surveyed localities (n = 64), in which the presence of C. latirostris was confirmed in 44% of the surveyed sites. Caimans occurred in both lentic and lotic habitats, although there was a preference for small dams, oxbow lakes and wetlands. Despite the hunting pressure and human impact on natural habitats, our results indicate that the populations of C. latirostris in the São Francisco basin are not fragmented. PMID: 21180900 [PubMed - in proc... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318642 Mon, 01 Nov 2010 00:00:00 +0100 4318642 http://www.medworm.com/index.php?rid=4318641&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180901%26dopt%3DAbstract In this study we analysed the dynamics of deforestation and burnings during the dry seasons from 2003 to 2008 in the Uruçuí-Una Ecological Station (UUES) and its buffer zone, located in the Cerrado biome of the southwest of Piauí, a Brazil's State, based on images from the orbital sensors CCD/CBERS-2 and TM/Landsat-5. Two dates from each of the years were interpreted and analysed: one in the middle of the dry season and one at the end. The deforested areas were expanded through the period analysed and were larger in the buffer zone, suggesting a relative protection of the UUES. New cut-offs were predictable because of the early opening of roads that would become their limits. The burning scars were larger at the end of the dry season as a consequence of the management and implementation... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318641 Mon, 01 Nov 2010 00:00:00 +0100 4318641 http://www.medworm.com/index.php?rid=4318640&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180902%26dopt%3DAbstract Authors: Gogosz A, Bona C, Santos G, Botosso P In 2000 there was an oil spill at the Getúlio Vargas Refinery (REPAR) in Paraná. Nearly five years after contamination and the use of bioremediation, a study was carried out to identify the effects of the contaminated soil and the bioremediated soil on the germination and initial growth of C. xanthocarpa. The experiment was established with soil from REPAR, with three treatment groups: contaminated soil (C), bioremediated soil (B) and uncontaminated soil (U); with five repetitions of 50 seeds each. There was no significant difference in the percentage of germination and the speed of germination index. The production of total biomass (30 - 60 days) and shoot biomass (60 days) was greater in the bioremediated soil compared to the other tre... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318640 Mon, 01 Nov 2010 00:00:00 +0100 4318640 http://www.medworm.com/index.php?rid=4318639&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180903%26dopt%3DAbstract This study aimed at estimating the population size and attitudes of residents towards caring for domestic dogs, through questionnaire surveys, as well as the frequency of these animals in different habitats (anthropic and forest patch), using scent stations. The study was conducted in a severely fragmented area of the Brazilian Atlantic Forest. A large number of unrestricted dogs was recorded, averaging 6.2 ind/km². These dogs have owners and are regularly fed. Dog records decreased from the anthropogenic matrix to the forest patch edge, which suggests that dogs act as an edge effect on forest patches. Encounters between domestic dog and wild animals can still be frequent in severely fragmented landscapes, mainly at the forest edges. However the fact that most dogs have an owner and are m... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318639 Mon, 01 Nov 2010 00:00:00 +0100 4318639 http://www.medworm.com/index.php?rid=4318638&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180904%26dopt%3DAbstract The objective of this study was to evaluate the abundance of chironomid larvae and to quantify the occurrence of mentum deformities in the specimens collected in three urban reservoirs with different trophic levels. The reservoirs are located in the hydrographic basin of the Paraopeba River, an affluent of the São Francisco River basin (Minas Gerais State, southeastern Brazil). The Serra Azul Reservoir is oligotrophic, the Vargem das Flores Reservoir is mesotrophic, and the Ibirité Reservoir is eutrophic. Along the littoral zone of each reservoir, 30 samples were collected during each sampling campaign. Sampling was carried out every three months for one year, with two sampling campaigns during the wet season and two during the dry season in 2008. Physical and chemical parameters measure... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318638 Mon, 01 Nov 2010 00:00:00 +0100 4318638 http://www.medworm.com/index.php?rid=4318637&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180905%26dopt%3DAbstract Authors: Bittencourt-Oliveira M, Santos D, Moura N Cyanobacterial blooms are a frequent occurrence in northeastern Brazil and constitute a serious public health problem. Using the polymerase chain reaction (PCR) method, eleven environmental samples with cyanobacteria from seven reservoirs were used to determine the presence of the gene involved in microcystin biosynthesis (mcyB). Two sets of oligonucleotide primers were designed from the sequencing of Brazilian populations of microcystin producing cyanobacteria (mcyB-F/R and mcyB-F/R-A). The presence of the mcyB gene involved in microcystin biosynthesis was found in all samples, indicating the potential of this gene for producing the toxin. The PCR method proved sensitive and appropriate for the detection of potential producers of micr... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318637 Mon, 01 Nov 2010 00:00:00 +0100 4318637 http://www.medworm.com/index.php?rid=4318636&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180906%26dopt%3DAbstract Authors: Esbérard C, Bergallo H Sunset and sunrise regulate the activities of most studied bat species. To verify patterns of foraging activity, 29 bat sampling nights were carried out over a dam in Rio de Janeiro city, which resulted in 363 hours with 730 captures, representing 13 species of insectivorous bats. Molossus molossus constituted the bulk of the captures (79.9%) and was present in 82.8% of the sampling nights. This bat species exhibited crepuscular and nocturnal activity (from -6 minutes to 900 minutes after the time of sunset). A bimodal activity pattern was observed, and two non-overlapping capture peaks. The first peak lasted from 6 minutes before sunset to 420 minutes after sunset. The second peak began at 564 minutes after sunset and ended just after sunrise. The firs... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318636 Mon, 01 Nov 2010 00:00:00 +0100 4318636 http://www.medworm.com/index.php?rid=4318635&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180907%26dopt%3DAbstract Authors: Vieira D, Socolowski F, Takaki M The aims of this study were to evaluate the effects of light and temperature on seed germination and the effect of light on seedling emergence of Clausena excavata, an invasive exotic species. Seeds were incubated at constant temperatures (10 to 40 ºC), under continuous white light and darkness. Seedling emergence was evaluated under full sun and canopy shade. There was no significant difference between seeds germinated in the presence or absence of light at temperatures between 20 and 35 ºC. Seeds maintained at 20 ºC germinated more slowly than other temperatures. Independent of temperature, seed germination was much more synchronised under white light than under darkness. In the field, emergence occurred in both environments, but a greater... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318635 Mon, 01 Nov 2010 00:00:00 +0100 4318635 http://www.medworm.com/index.php?rid=4318634&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180908%26dopt%3DAbstract This study evaluated trophic changes resulting from these nutrient inputs into the diet, feeding activity and nutritional condition of Auchenipterus osteomystax, an insectivore that alternatively feeds on zooplankton. Fish were sampled with gillnets in two tilapia (Oreochromis niloticus) experimental caging aquaculture areas of the Rosana reservoir (Paranapanema River), at different distances from the cages. Samplings were carried out for 90 days (before the cages were installed and 30 and 60 days after installation). Diet analysis was based on 250 stomach contents evaluated with occurrence and volumetric methods, combined into a Feeding Index. The spatial and temporal variations in feeding activity were inferred by the stomach repletion index (stomach weight). The relative condition facto... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318634 Mon, 01 Nov 2010 00:00:00 +0100 4318634 http://www.medworm.com/index.php?rid=4318633&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180909%26dopt%3DAbstract Authors: De Los Rios-Escalante P, Gajardo G The Chilean saline lakes are distributed mainly in the Atacama desert in northern Chile and the southern Patagonian plains. The scarce studies are restricted mainly to northern Chilean saline lakes, and these revealed that the main component in these ecosystems are the halophylic copepod Boeckella poopoensis Marsh 1906, or the brine shrimp Artemia franciscana (Kellog, 1906), and both species do not coexist. The present study consisted of field observations in zooplankton assemblages in southern Chilean saline lakes (51-53 ºS). These first observations revealed three different patterns, one saline lake only with A. persimilis (Piccinelli and Prosdocimi, 1968), a second lake only with B. poopensis, and a third lake with A. persimilis, B. poopo... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318633 Mon, 01 Nov 2010 00:00:00 +0100 4318633 http://www.medworm.com/index.php?rid=4318632&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180910%26dopt%3DAbstract Authors: Gomiero L, Villares Junior G, Naous F The diet of Cichla kelberi introduced in an artificial lake in Leme-SP was predominantly composed of common fish species (Oreochromis niloticus and C. kelberi). In the spring and summer, the most consumed item was O. niloticus. However, cannibalism was very common for this species. The high frequencies of O. niloticus and C. kelberi reveal that this species is adapted to a seasonal cycle, feeding on the most common prey in each period of the year, with a reduction of foraging activity during the winter. The diets were different among the immature and mature individuals suggesting that there are ontogenetic differences, mainly related to prey type, such as: Ephemeroptera consumed by the immature peacock bass and fish by the mature ones, bes... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318632 Mon, 01 Nov 2010 00:00:00 +0100 4318632 http://www.medworm.com/index.php?rid=4318631&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180911%26dopt%3DAbstract Authors: Gobatto V, Giani S, Camassola M, Dillon A, Specht A, Barros N Samples of the Bacillus thuringiensis (Bt) were collected from soil and insects. Eight isolates were selected from rural soil, 15 from urban soil and 11 from insects. These were evaluated for entomopathogenicity against larvae of Anticarsia gemmatalis and Culex quinquefasciatus. The pathogenicity tests showed that a higher percentage of isolates were active against A. gemmatalis (60%) compared to C. quinquefasciatus (31%). Probit analysis (LC50) indicated that against A. gemmatalis four of the isolates presented values similar to the reference strain against A. gemmatalis, while against C. quinquefasciatus one isolate showed an LC50 similar to the reference strain (IPS-82). SDS-PAGE characterisation of two isolates ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318631 Mon, 01 Nov 2010 00:00:00 +0100 4318631 http://www.medworm.com/index.php?rid=4318630&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180912%26dopt%3DAbstract Authors: Costa L, Lourenço E, Esbérard C, Silva R Phyllostomus hastatus bat is species broadly distributed over the Neotropical region, which uses as diurnal roosts caves, hollow trees, palm leaves and human buildings. Thirteen diurnal roosts of P. hastatus were analysed from 1990 to 2009 in several localities of Rio de Janeiro State, regarding environment (rural, urban or protected area), type of roost (hollow tree, basement or roof), sex ratio and cohabitation. A nocturnal roost was also analysed. Sex ratio of P. hastatus varied considerably among roosts what may be explained by the fact this species can roost alone, in couples, in harems or in groups of bachelor males. Phyllostomus hastatus was observed in cohabitation with three other species: Molossus rufus, Molossus molossus an... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318630 Mon, 01 Nov 2010 00:00:00 +0100 4318630 http://www.medworm.com/index.php?rid=4318629&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180913%26dopt%3DAbstract Authors: Martins R, Alves R The aim of this study was to evaluate the presence of Chaetogaster limnaei K. von Baer, 1927 in four species of mollusks collected in irrigation channels of a horticultural garden in the city of Juiz de Fora, Minas Gerais State, Southeastern Brazil. The collections were made from June 2005 to January 2006. Of the four species of mollusks analysed, we could not detect the presence of C. limnaei in Pomacea lineata (Spix, 1827). There were recorded 320 specimens of C. limnaei in association with Aplexa rivalis Mastou & Rackett, 1898, Lymnaea columella Say, 1818 and Biomphalaria sp., the latter having the highest number of associated Naididae. PMID: 21180913 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318629 Mon, 01 Nov 2010 00:00:00 +0100 4318629 http://www.medworm.com/index.php?rid=4318628&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180914%26dopt%3DAbstract Authors: Maia V, Fleury G, Soares G, Isaias R The gall of Pisphondylia brasiliensis on Guapira opposita, itsfemale and pupa are described and illustrated. The geographic distribution of this species is now widened to Minas Gerais and Rio Grande do Sul (Brazil). For the first time, a female of the genusis described. PMID: 21180914 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318628 Mon, 01 Nov 2010 00:00:00 +0100 4318628 http://www.medworm.com/index.php?rid=4318627&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180915%26dopt%3DAbstract Authors: Höfling J, Anibal P, Obando-Pereda G, Peixoto I, Furletti V, Foglio M, Gonçalves R The increase in the resistance to antimicrobial drugs in use has attracted the attention of the scientific community, and medicinal plants have been extensively studied as alternative agents for the prevention of infections. The Candida genus yeast can become an opportunistic pathogen causing disease in immunosuppressive hosts. The purpose of this study was to evaluate dichloromethane and methanol extracts from Mentha piperita, Rosmarinus officinalis, Arrabidaea chica, Tabebuia avellanedae, Punica granatum and Syzygium cumini against Candida species through the analysis of Minimum Inhibitory Concentration (MIC). Results presented activity of these extracts against Candida species, especially t... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318627 Mon, 01 Nov 2010 00:00:00 +0100 4318627 http://www.medworm.com/index.php?rid=4318626&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180916%26dopt%3DAbstract Authors: Cruz-Landim C, Patrício K The present paper shows through conventional light microscopy, silver nitrate impregnation and Transmission Electron Microscopy, the changes in nuclear activity that occurs in the ovary cells during vitellogenesis of Apis mellifera (Linnaeus, 1758). The material impregnated by silver nitrate was detected in nurse cells, oocyte germinal vesicle and follicular cells, whose amounts are greater in phases corresponding to ovarian cells more intense activity. The silver impregnation permitted to demonstrate that the oocyte germinal vesicle synthezises ribonucleoproteins (RNP) during the beginning of the vitellogenesis. The ultrastructure show nucleolar-like material corresponding to nuclear sites impregnated by silver. PMID: 21180916 [PubMed - in proce... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318626 Mon, 01 Nov 2010 00:00:00 +0100 4318626 http://www.medworm.com/index.php?rid=4318625&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180917%26dopt%3DAbstract Authors: Rosa A, Blochtein B, Ferreira N, Witter S Brassica napus Linnaeus is considered a self-compatible crop; however, studies show that bee foraging elevates their seed production. Considering bee food shortages during the winter season and that the canola is a winter crop, this study aimed to evaluate the foraging behaviour of Apis mellifera Linnaeus, 1758 regarding those flowers, and to verify if it presents adequate behaviour for successfully pollinating this crop in Rio Grande do Sul State. The study was carried out in a canola field, in Southern Brazil. The anthesis stages were morphologically characterised and then related to stigma receptivity and pollen grain viability. Similarly, the behaviour of A. mellifera individuals on flowers was followed, considering the number of f... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318625 Mon, 01 Nov 2010 00:00:00 +0100 4318625 http://www.medworm.com/index.php?rid=4318624&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180918%26dopt%3DAbstract Authors: Pompelli M, Martins S, Celin E, Ventrella M, Damatta F Stomata are crucial in land plant productivity and survival. In general, with lower irradiance, stomatal and epidermal cell frequency per unit leaf area decreases, whereas guard-cell length or width increases. Nevertheless, the stomatal index is accepted as remaining constant. The aim of this paper to study the influence of ordinary epidermal cells and stomata on leaf plasticity and the influence of these characteristics on stomata density, index, and sizes, in the total number of stomata, as well as the detailed distribution of stomata on a leaf blade. As a result, a highly significant positive correlation (R²a = 0.767 p < 0.001) between stomatal index and stomatal density, and with ordinary epidermal cell density (R�... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318624 Mon, 01 Nov 2010 00:00:00 +0100 4318624 http://www.medworm.com/index.php?rid=4318623&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180919%26dopt%3DAbstract We present a description and illustrations of these taxa. These nematodes have an indirect life cycle and amphibians are infected by consuming invertebrate, the intermediate hosts. The genus Spiroxys and superfamily Seuratoidea were reported for the first time for Argentinean amphibians. PMID: 21180919 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318623 Mon, 01 Nov 2010 00:00:00 +0100 4318623 http://www.medworm.com/index.php?rid=4318622&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180920%26dopt%3DAbstract Authors: Gomiero L, Carmassi A, Rondineli G, Villares Junior G, Braga F The growth and mortality parameters were estimated through the analysis of length frequency distribution for species of Cichla spp. introduced into a lake in Leme (SP), and in Volta Grande reservoir (SP-MG). In Leme, Cichla kelberi presented larger frequency in the inferior classes of lengths, larger instantaneous rate of natural mortality, and smaller number of cohorts than C. kelberi and C. piquiti in Volta Grande. The values of growth performance obtained for the species were similar, corroborating the validity of the estimated growth and mortality parameters. The increase of the growth rate in small and less diverse environments occurs due to predation. The genus Cichla adapts well in locations in which it is i... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318622 Mon, 01 Nov 2010 00:00:00 +0100 4318622 http://www.medworm.com/index.php?rid=4318621&cid=s_32697_62_f&fid=32697&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21180921%26dopt%3DAbstract Authors: Castro C, Nunes J, Penteado-Dias A Two new species of Pedinotus genus are described from the Brazilian savannah area, providing a new key to identify the species. PMID: 21180921 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=4318621 Mon, 01 Nov 2010 00:00:00 +0100 4318621