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. Fri, 19 Mar 2010 17:20:26 +0100 http://www.medworm.com/index.php?rid=3371049&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%3D20231952%26dopt%3DAbstract Authors: PMID: 20231952 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371049 Mon, 01 Feb 2010 00:00:00 +0100 3371049 http://www.medworm.com/index.php?rid=3371048&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%3D20231953%26dopt%3DAbstract Authors: Tundisi TM PMID: 20231953 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371048 Mon, 01 Feb 2010 00:00:00 +0100 3371048 http://www.medworm.com/index.php?rid=3371047&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%3D20231954%26dopt%3DAbstract Authors: Santos C, Eskinazi-Sant'anna E Records of the gastropod Melanoides tuberculatus (Müller, 1774), family Thiaridae, in the Piranhas-Assu River basin in Rio Grande do Norte reveal the dispersal of this native Southeast Asian and East African species into aquatic environments of the Brazilian semiarid region, including artificial environments (reservoirs) and lotic systems. The eutrophic conditions of the local waterbodies appear to favor the present situation, where this invasive species reaches extremely high densities, sometimes over 10,000 ind.m-2 as in Armando Ribeiro Gonçalves Reservoir. These observations indicate the immediate need for new studies on the spatial distribution of the species and its potential impact on the biodiversity and water quality of the wate... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371047 Mon, 01 Feb 2010 00:00:00 +0100 3371047 http://www.medworm.com/index.php?rid=3371046&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%3D20231955%26dopt%3DAbstract Feeding associations between Guiana dolphins, Sotalia guianensis (Van Bénèden, 1864) and seabirds in the Lagamar estuary, Brazil. Braz J Biol. 2010 Feb;70(1):9-17 Authors: Santos M, Oshima J, Pacífico E, Silva E The main objective of the present study was to describe the characteristics regarding interactions between Guiana dolphins, Sotalia guianensis and seabirds in feeding associations in two distinct areas of the Lagamar estuary, Brazil. Boat-based surveys directed towards photo-identification studies of S. guianensis were conducted in the Cananéia Estuary (CE) (25 degrees 01' S and 47 degrees 55' W) from July 2004 to March 2008, as well as in the Paranaguá Estuarine Complex (PEC) (25 degrees 24' S and 48 degrees 24' W) from April 2006 to February 2... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371046 Mon, 01 Feb 2010 00:00:00 +0100 3371046 http://www.medworm.com/index.php?rid=3371045&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%3D20231956%26dopt%3DAbstract Authors: Lemos-Filho J, Barros C, Dantas G, Dias L, Mendes R Canopy cover has significant effects on the understory environment, including upon light availability for seedling growth. The aim of the present study was to verify spatial heterogeneity and seasonal changes in the canopy cover of a dense Cerrado area, and their relationship to understory photosynthetic active radiation availability. Leaf area index (LAI) values in the rainy season varied from 0.9 to 4.83, with 40% of the values ranging from 4.0 to 5.0, while in the dry season LAI varied from 0.74 to 3.3, with 53% of the values oscilating from 2.0 to 3.0. Understory light (Qi ) and the Lambert-Beer ratio (Qi/Qo) were taken around noon on sunny days (between 11:00 AM and 1:00 PM). They were also statistically different (p &lt... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371045 Mon, 01 Feb 2010 00:00:00 +0100 3371045 http://www.medworm.com/index.php?rid=3371044&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%3D20231957%26dopt%3DAbstract Authors: Minto W, Arcifa M, Perticarrari A The aim of this work was to evaluate whether diel vertical migration of microcrustaceans from Lake Monte Alegre is related to invertebrate predators, namely larvae of Chaoborus brasiliensis. The hypothesis tested in the experiments was that the migratory behaviour of prey would depend on physical contact with Chaoborus brasiliensis larvae or with kairomones released by them. Two experiments were undertaken in the laboratory, with two treatments and three replicates each. Experiments were carried out in acrylic cylinders 1.5 m high and 0.20 m in diameter. Treatments in Experiment I were: A) predator and kairomones present and B) predator and kairomones present, but predator isolated in net tube inside the cylinder, having no physical contact wi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371044 Mon, 01 Feb 2010 00:00:00 +0100 3371044 http://www.medworm.com/index.php?rid=3371043&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%3D20231958%26dopt%3DAbstract The objective of this paper was to assess the blue crab (Callinectes sapidus) fishing in the region, from January 1998 to December 2006, and obtain supportive data to implement technical rules for the rational exploitation and resulting conservation of this resource. The results show a remarkable decrease in the fisheries' abundance index (CPUE) up to 2005, from 9.4 to 4.0 kg/hour, mainly caused by an increase in fishing effort, from 1,960 to 13,776 hours on a yearly basis. With the decrease in the fishing effort in 2005 and 2006, the abundance index reacted positively, indicating a recovery of the exploited population. Due to the lack of appropriate regulation limiting the fishing effort and organising the fluctuating admission rates of new fishermen, there is a noticeable increase of the... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371043 Mon, 01 Feb 2010 00:00:00 +0100 3371043 http://www.medworm.com/index.php?rid=3371042&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%3D20231959%26dopt%3DAbstract Authors: Lazure L, Bachand M, Ansseau C, Almeida-Cortez J We studied the role of white-lipped and collared peccaries (Tayassu pecari and Pecari tajacu) as seed predators and dispersers in the Atlantic rainforest of Brazil. The Atlantic rainforest ecosystem is highly threatened and has experienced dramatic declines in its populations of large mammals. Local extinctions can disrupt essential plant-animal interactions such as seed dispersion and seed predation. We tracked seeds from time of consumption to germination to assess the direct impact peccaries have on seed survival. We offered fruits of 20 species found in the Atlantic rainforest to the peccaries. Seeds were categorised as intact, scarified, ingested or defecated, and germination tests were performed. The overall impact by both... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371042 Mon, 01 Feb 2010 00:00:00 +0100 3371042 http://www.medworm.com/index.php?rid=3371041&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%3D20231960%26dopt%3DAbstract The objective was to determine edge effects on a fragment of the Atlantic Forest. The greatest species richness was observed in sites A and B (23 species), compared with site C (16 species). Site A showed the greatest abundance and constancy, independent of the degree of synanthropy. Asynanthropic species were more abundant and constant in sites B and C. Site B showed the greatest diversity; and sites A and B showed the greatest similarity of populations. There was no significant correlation between Calliphoridae richness and canopy openness except in site C. Richness and abundance were positively correlated with subwood density, except for richness in site B. PMID: 20231960 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371041 Mon, 01 Feb 2010 00:00:00 +0100 3371041 http://www.medworm.com/index.php?rid=3371040&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%3D20231961%26dopt%3DAbstract This study was developed in Cananéia, from February 1999 to December 2006. The oyster production data in dozens was obtained through weekly or monthly interviews. The annual and average CPUE in dozens per day was analysis to verify significant differences along years. There are no regulations that limit the fishing effort or organize the admission in the fishermen. The admission is controlled by the condition of the market and there is a risk of increasing the fishing effort above the sustainable yield, which demands measures that control the number of fishermen enganged in the activity. Those measures, to be effective, must be created in discussion with the fisheries sector, based on technical information. PMID: 20231961 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371040 Mon, 01 Feb 2010 00:00:00 +0100 3371040 http://www.medworm.com/index.php?rid=3371039&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%3D20231962%26dopt%3DAbstract Authors: Portes M, Damineli D, Ribeiro R, Monteiro J, Souza G The present study investigated changes in photosynthetic characteristics of Guazuma ulmifolia Lam. (early successional species) and Hymenaea courbaril L. (late successional species) grown in contrasting light conditions as a way of assessing photosynthetic plasticity. Early successional species typically inhabit gap environments being exposed to variability in multiple resources, hence it is expected that these species would show higher photosynthetic plasticity than late successional ones. In order to test this hypothesis, light and CO2 response curves and chlorophyll content (Chl) were measured in plants grown in high and low light environments. G. ulmifolia presented the highest amounts of both Chl a and b, especially in ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371039 Mon, 01 Feb 2010 00:00:00 +0100 3371039 http://www.medworm.com/index.php?rid=3371038&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%3D20231963%26dopt%3DAbstract Nesting ecology of Podocnemis expansa (Schweigger, 1812) and Podocnemis unifilis (Troschel, 1848) (Testudines, Podocnemididae) in the Javaés River, Brazil. Braz J Biol. 2010 Feb;70(1):85-94 Authors: Ferreira Júnior P, Castro P Nest site has influence on incubation duration and hatching success of two Neotropical turtles, the Giant Amazon River Turtle (Podocnemis expansa) and Yellow-Spotted Side-Neck Turtle (Podocnemis unifilis - 'Tracajá'). The 2000 and 2001 nesting seasons have been monitored at the Javaés River in Bananal Island, Brazil. Although they nest on the same beaches, there is a separation of the nesting areas of P unifilis and P. expansa nests on the upper parts of the beach. The incubation duration for P. expansa is influenced by the nesting per... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371038 Mon, 01 Feb 2010 00:00:00 +0100 3371038 http://www.medworm.com/index.php?rid=3371037&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%3D20231964%26dopt%3DAbstract Authors: Pinheiro M, Monteiro R Theories that attempt to explain the origin of the cerrado biome are mostly based on the isolated action of three major factors: climate, fire and soil. Another factor that has been mentioned is that of human interference. We hypothesise that the evolutionary origin of this biome resulted from the complex interaction of climate, fire and soil, with climate being the triggering agent of this assumed interaction. Fire, as well as acid and dystrophic soils, would be factors involved in the selection of savanna species throughout climatic events, during the Tertiary and the Quaternary, e.g. Pliocene and Pleistocene. The genesis of the physiognomies that would give rise to cerrado sensu lato, rather than forest formations, could have occurred due to the stron... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371037 Mon, 01 Feb 2010 00:00:00 +0100 3371037 http://www.medworm.com/index.php?rid=3371036&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%3D20231965%26dopt%3DAbstract Authors: Scherrer S, Diniz I, Morais H Folivore cerrado caterpillars are found on their host species in low frequencies, which vary between plants and throughout the year. We analysed the effects of climatic variation and of the characteristics of two host species (Miconia, Melastomataceae) on caterpillar abundance. The work was carried out in a cerrado sensu stricto area in Brasília, Federal District, Brazil, from May 1998 to September 1999. One hundred plants of each species were inspected monthly. All caterpillars found were collected and raised in the laboratory with Miconia leaves as food sources. Climatic data for the study area and plant characteristics such as local density, spatial distribution, foliar phenology, leaf pilosity and nutritional content were used to test the... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371036 Mon, 01 Feb 2010 00:00:00 +0100 3371036 http://www.medworm.com/index.php?rid=3371035&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%3D20231966%26dopt%3DAbstract Group size and composition of Guiana dolphins (Sotalia guianensis) (Van Bénèden, 1864) in the Paranaguá Estuarine Complex, Brazil. Braz J Biol. 2010 Feb;70(1):111-20 Authors: Santos M, Oshima J, Pacífico E, Silva E The aim of the present study was to describe the characteristics of Guiana dolphins (S. guianensis) group size and composition in the Paranaguá Estuarine Complex (25 degrees 15' -25 degrees 36' S and 48 degrees 02'-48 degrees 45' W), Paraná State, as well as to verify the existence of relationships between a given environmental variable (water depth, salinity, transparency and temperature) and group size. An area of around 124 km(2) was surveyed by boat from April 2006 to February 2008 in the following subsets of the estuary: Canal do Su... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371035 Mon, 01 Feb 2010 00:00:00 +0100 3371035 http://www.medworm.com/index.php?rid=3371034&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%3D20231967%26dopt%3DAbstract Authors: Abreu M, Santos-Wisniewski M, Rocha O, Orlando T The cladocerans are important components of planktonic and benthic freshwater and good indicators of the trophic state of water bodies. The morphological taxonomy of many species of Cladocera is considered complex with minor differences separating some species. Nowadays, molecular techniques provide a powerful tool to identify and classify different taxonomical levels, using mainly ribosomal RNA genes (rRNA) as molecular markers. In the present work we performed PCR-RFLP to separate Ceriodaphnia dubia, an exotic species in Brazil and the native species Ceriodaphnia silvestrii, widely distributed in Brazilian freshwater. The RFLP analysis of the ITS1-5.8S-ITS2 region of rRNA genes showed to be different between C. dubia and C. si... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371034 Mon, 01 Feb 2010 00:00:00 +0100 3371034 http://www.medworm.com/index.php?rid=3371033&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%3D20231968%26dopt%3DAbstract Hermaphroditism among dioecious Tagelus plebeius (Lightfoot, 1786) (Mollusca, Psammobiidae) and Iphigenia brasiliana (Lamarck, 1818) (Mollusca, Donacidae) on the Cachoeira River Estuary, Ilhéus, Bahia, Brazil. Braz J Biol. 2010 Feb;70(1):125-127 Authors: Ceuta L, Boehs G, Santos J The samples of Tagelus plebeius and Iphigenia brasiliana were manually collected on the Cachoeira River estuary region (Ilhéus, BA, Brazil) between August 2005 and August 2006, with a periodicity of 15 days, with 20 animals collected/sampled, performing 500 samples from each species. The animals were measured, eviscerated and kept in solution of Davidson and after 24-30 hours, they were transferred to ethanol 70%. The material was processed for routine histology, with paraffin embedding, obt... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371033 Mon, 01 Feb 2010 00:00:00 +0100 3371033 http://www.medworm.com/index.php?rid=3371032&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%3D20231969%26dopt%3DAbstract Authors: Lustrino D, Tunholi-Alves V, Tunholi V, Marassi M, Pinheiro J The influence of different photophases (0, 6, 12, 18 and 24 hours) on the triglycerides and total cholesterol contents in the hemolymph of A. fulica was evaluated, since there is no information in the literature about the influence of this factor on lipids metabolism in mollusks. After 2 and 4 weeks of exposure the snails were dissected. The cholesterol content at the 2nd and 4th weeks post exposure only varied significantly in the groups exposed at 24 hours and 0 hour of photophase, respectively. Probably, such increase may be a result of a rise in cholesterol biosynthesis and/or remodelling of cell membranes. There were no significant differences among the content of triglycerides in the snails exposed to 6, 12, 1... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371032 Mon, 01 Feb 2010 00:00:00 +0100 3371032 http://www.medworm.com/index.php?rid=3371031&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%3D20231970%26dopt%3DAbstract Authors: Simão E, Takaki M, Cardoso V The germination response of Hylocereus setaceus seeds to isothermic incubation at different water potentials was analysed by using the thermal time and hydrotime models, aiming to describe some germination parameters of the population and to test the validity of the models to describe the response of the seeds to temperature and water potential. Hylocereus setaceus seeds germinated relatively well in a wide range of temperatures and the germination was rate limited from 11 to 20 degrees C interval and beyond 30 degrees C until 40 degrees C, in which the germination rate respectively shifts positively and negatively with temperature. The minimum or base temperature (Tb) for the germination of H. setaceus was 7 degrees C, and the ceiling tempera... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371031 Mon, 01 Feb 2010 00:00:00 +0100 3371031 http://www.medworm.com/index.php?rid=3371030&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%3D20231971%26dopt%3DAbstract Authors: Batista R, Wohlres-Viana S, Pinto I, Maffili V, Viana J The aim of this study was to evaluate different mating strategies among endogamic strains to create F1 populations of mice, minimising the effect of inbreeding depression on somatic development and embryo yield. Females from the strains Swiss, CBA and C57Bl/6 were divided in nine experimental mate arrangements. The total numbers of pups born alive per dam and somatic development, estimated by weighing and measuring the crown-rump length, were recorded. Superovulation response was evaluated in outbreed females. Litter size differed among endogamic dams, irrespective of the sire. Somatic development results suggest heterosis and imprinting phenomena, once a differential parental effect was demonstrated. There was no differe... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371030 Mon, 01 Feb 2010 00:00:00 +0100 3371030 http://www.medworm.com/index.php?rid=3371029&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%3D20231972%26dopt%3DAbstract Authors: Santana-Neto P, Albuquerque C, Silva A, Svedese V, Lima E Members of the Fusarium solani species complex are agents of human mycoses, also affecting plants and other animals. Nevertheless, this fungus has not been reported on scorpions. Ten specimens of Tityus stigmurus collected in the field and showing their surface covered by white mycelia were used to assess fungus presence in the animal after its death. Identification of the fungi was based upon the cultural and morphological characteristics. The fungus was isolated from chelicerae and intersegmental regions. Infected individuals had their behaviour modified by reducing feeding and locomotion. None of the infected individuals survived. It is likely that this fungus may have a role in the regulation of field scorpion popul... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371029 Mon, 01 Feb 2010 00:00:00 +0100 3371029 http://www.medworm.com/index.php?rid=3371028&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%3D20231973%26dopt%3DAbstract Diet of the freshwater stingray Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) on Marajó Island (Pará, Brazil). Braz J Biol. 2010 Feb;70(1):155-62 Authors: Almeida M, Lins P, Charvet-Almeida P, Barthem R The stomach contents of 137 examples of Potamotrygon motoro caught in 3 locations (Muaná, Afuá and Lake Arari) on Marajó Island were analysed. The values of the Index of Relative Importance (IRI) and its respective percentage (%IRI) were calculated. The level of repletion 1 ((1/4) full) was the most representative for both sexes, as well as for immature and mature specimens. Most of the food items found were well-digested. The food items identification indicated the presence of 15 orders, including insects, mollusks, crustaceans, annelids and fi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371028 Mon, 01 Feb 2010 00:00:00 +0100 3371028 http://www.medworm.com/index.php?rid=3371027&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%3D20231974%26dopt%3DAbstract Authors: Pinheiro D, Silva M, Gregório E The sugarcane borer Diatraea saccharalis (Lepidoptera: Crambidae) has been controlled by Cotesia flavipes (Hymenoptera: Braconidae); however, very little is known about the effect of the parasitism in the host organs, including the midgut. This work aims to verify mitochondrial alteration in the different midgut epithelial cells of D. saccharalis parasitized by C. flavipes. Midgut fragments (anterior and posterior region) of both non-parasitized and parasitized larvae were processed for transmission electron microscopy. The mitochondria of midgut epithelial cell in the parasitized larvae exhibit morphological alteration, represented by matrix rarefaction and vacuolisation. These mitochondrial alterations are more pronounced in the anterior ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371027 Mon, 01 Feb 2010 00:00:00 +0100 3371027 http://www.medworm.com/index.php?rid=3371026&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%3D20231975%26dopt%3DAbstract Authors: Ferrari L, de la Torre F, Salibián A The water balance and the upper limit of osmotic tolerance of premetamorphic Rhinella arenarum larvae (Gosner's stage 26) was evaluated after semistatic incubation in electrolyte (NaCl) and non-electrolyte (mannitol) media following a protocol of progressively increased osmotic pressure. Wet and dry weights were measured to calculate the water content as a derived variable indicative of the hydric balance. Statistical analysis was performed using univariate and integrated multivariate analysis. Tadpoles survived in electrolyte and non-electrolyte solutions up to 200 mOsm. The discriminant function was the best tool to describe the responses of the animals to external environmental stress under experimental conditions. The results were ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371026 Mon, 01 Feb 2010 00:00:00 +0100 3371026 http://www.medworm.com/index.php?rid=3371025&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%3D20231976%26dopt%3DAbstract Reproduction of the fish community of Passa Cinco Stream, Corumbataí River sub-basin, São Paulo State, Southeastern Brazil. Braz J Biol. 2010 Feb;70(1):181-8 Authors: Rondineli G, Braga F The aim of this work was to evaluate the reproduction (verifying if there was reproductive activity and, if so, with what intensity) of the most abundant species of the fish community in Passa Cinco stream, in relation to the dry and wet season periods and to the longitudinal gradient, through the application of the reproductive intensity index (RII). The sample collection was carried out during one year with six samplings (May, July, September and November 2005, and January and March 2006) in five different points of Passa Cinco stream, contemplating sites of orders two to six. The ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371025 Mon, 01 Feb 2010 00:00:00 +0100 3371025 http://www.medworm.com/index.php?rid=3371024&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%3D20231977%26dopt%3DAbstract In conclusion, our data indicate that S. umbellatum latex, under the conditions of this research, presented angiogenic effect. PMID: 20231977 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371024 Mon, 01 Feb 2010 00:00:00 +0100 3371024 http://www.medworm.com/index.php?rid=3371023&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%3D20231978%26dopt%3DAbstract In this study, morphological similarities of the Neomorphinae are discussed after a comprehensive description of the cranial osteology was conducted in seven species, embracing all the Neomorphinae genera. This description is followed by comparisons with other cuckoos in order to contribute to the anatomy and systematics of this sub-family. In this way, we provide illustrations that enable the osteological descriptions and the proposed primary homologies to be visualised and compared. Even though Neomorphinae species share many cranial osteological characteristics, there are some anatomical divergences that allowed us to divide them into two distinct groups: (Dromococcyx/Tapera) and (Morococcyx(Neomorphus/Geococcyx )). After comparisons among all cuckoos this study suggests that Neomorphin... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371023 Mon, 01 Feb 2010 00:00:00 +0100 3371023 http://www.medworm.com/index.php?rid=3371022&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%3D20231979%26dopt%3DAbstract Authors: Martins M, Mouriño J, Fezer G, Buglione Neto C, Garcia P, Silva B, Jatobá A, Vieira F The aim of this study was to evaluate the pathogenicity of Vibrio alginolyticus isolated from an outbreak of sea horse Hippocampus reidi reared in the State of Santa Catarina, Brazil, by experimental infection. Sea horses with necrosis on the mouth epithelium were collected from aquaria at the Aquaculture Department, UFSC and the bacterium isolated from the mouth, liver, heart and blood in tiosulphate citrate bilesalt sucrose agar broth. The strains were identified by API 20E kit with 99.1% probability as Vibrio alginolyticus. Twelve adult sea horses (9.63 +/- 2.42 g and 15.12 +/- 0.87 cm) were distributed in six aquaria of 10 L capacity with aerated sea water. Fish from three aquar... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371022 Mon, 01 Feb 2010 00:00:00 +0100 3371022 http://www.medworm.com/index.php?rid=3371021&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%3D20231980%26dopt%3DAbstract Authors: Forti L, Strüssmann C, Mott T Ameerega braccata is an aposematic, small dendrobatid anuran known from its type-locality, Chapada dos Guimarães, in the State of Mato Grosso, and from a few additional localities in Mato Grosso do Sul and Goiás States, Brazil. The advertisement call of A. braccata is composed of a single unpulsed note, with a frequency range from 3.5 to 4.2 KHz (N = 110), and average duration of 65.8 ms (N = 110, SD = 11.6). The territorial call is composed of five or six repeated notes, structurally similar to advertisement call notes. The courtship call is emitted in close-range interactions between male-female during the courtship event and may reach frequencies of 2.2 to 5.3 KHz (N = 10), with shorter notes (average duration 43 ms; N = 10; SD =... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371021 Mon, 01 Feb 2010 00:00:00 +0100 3371021 http://www.medworm.com/index.php?rid=3371020&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%3D20231981%26dopt%3DAbstract Authors: Böckelmann P, Ochandio B, Bechara I Teleostean fins when partially amputated suffer a regenerative process called epimorphic regeneration, characterized by the following stages: healing, based on the formation of a multistratified epidermal layer, the formation of a mass of pluripotent cells known as blastema, the differentiation of these cells, the synthesis and disposition of the extracellular matrix, morphological growth and restoration. The epidermis has a fundamental role in the regenerative process of fish fins, as the healing time of this structure leads it to a faster regenerative process and it also works as a defense against the external environment. In this sense, due to the fast regeneration shown by the epidermis, the aim of this paper is to study the histolo... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371020 Mon, 01 Feb 2010 00:00:00 +0100 3371020 http://www.medworm.com/index.php?rid=3371019&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%3D20231982%26dopt%3DAbstract Authors: Elmoor-Loureiro L, Santangelo J, Lopes P, Bozelli R PMID: 20231982 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371019 Mon, 01 Feb 2010 00:00:00 +0100 3371019 http://www.medworm.com/index.php?rid=3371018&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%3D20231983%26dopt%3DAbstract Authors: Figueroa D, de Los Ríos P PMID: 20231983 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3371018 Mon, 01 Feb 2010 00:00:00 +0100 3371018 http://www.medworm.com/index.php?rid=3339971&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%3D19967180%26dopt%3DAbstract Attraction of Schistosoma mansoni Sambon, 1907 miracidia to Biomphalaria glabrata (Say, 1818) in the presence of Angiostrongylus costaricensis Morera and Céspedes, 1971 infection. Braz J Biol. 2009 Nov;69(4):1101-5 Authors: Guerino LR, Linhares AX, Magalhães LA, Zanotti-Magalhães EM The attraction exerted by Biomphalaria glabrata infected with Angiostrongylus costaricensis on Schistosoma mansoni miracidia of the BH strain was tested, using a glass apparatus composed by two circular chambers connected to a channel. One mollusk or a sample of a snail conditioning water (SCW) was placed in one of the chambers, randomly selected, and the remaining of the apparatus was filled with chlorine-free water. Ten miracidia were placed in the centre of the channel and their be... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3339971 Sun, 01 Nov 2009 00:00:00 +0100 3339971 http://www.medworm.com/index.php?rid=3066849&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%3D19967168%26dopt%3DAbstract Authors: PMID: 19967168 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066849 Sun, 01 Nov 2009 00:00:00 +0100 3066849 http://www.medworm.com/index.php?rid=3066848&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%3D19967169%26dopt%3DAbstract Authors: Costa E, Mauro R, Silva J The Parque Estadual do Prosa (PEP), in Campo Grande, MS, is an urban fragment of savanna (cerrado) and tall savanna woodland (cerradão), with an area of 1,335 km(2), where the population density of brown-nosed coatis is 33.71 individuals/km(2). Our results suggest that seasonality at the PEP causes changes in the availability of resources for coatis, altering their home range areas, their dispersion patterns and their daily behaviour. And our observations regarding male-band associations, agonistic interactions between bands and their daily behaviour emphasize the plasticity of coati social structure, and its potential for future comparative studies. PMID: 19967169 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066848 Sun, 01 Nov 2009 00:00:00 +0100 3066848 http://www.medworm.com/index.php?rid=3066847&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%3D19967170%26dopt%3DAbstract Authors: Ferreira M, Rosso S Increased tourist activity in coastal regions demands management strategies to reduce impacts on rocky shores. The highly populated coastal areas in southeastern Brazil are an example of degradation caused by development of industry and tourism. Among different shore impacts, trampling has been intensively studied, and may represent a significant source of stress for intertidal fauna. A randomised blocks design was applied to experimentally study the effects of two different trampling intensities on richness, diversity, density and biomass of the rocky shore fauna of Obuseiro beach, Guarujá, southeastern Brazil. Blocks were distributed in two portions of the intertidal zone, dominated respectively by Chthamalus bisinuatus (Cirripedia) and Isognomon bic... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066847 Sun, 01 Nov 2009 00:00:00 +0100 3066847 http://www.medworm.com/index.php?rid=3066846&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%3D19967171%26dopt%3DAbstract Population dynamics: seasonal variation of phytoplankton functional groups in brazilian reservoirs (Billings and Guarapiranga, São Paulo). Braz J Biol. 2009 Nov;69(4):1001-13 Authors: Gemelgo M, Mucci J, Navas-Pereira D Phytoplankton may function as a 'sensor' of changes in aquatic environment and responds rapidly to such changes. In freshwaters, coexistence of species that have similar ecological requirements and show the same environmental requirements frequently occurs; such species groups are named functional groups. The use of phytoplankton functional groups to evaluate these changes has proven to be very useful and effective. Thus, the aim of this study was to evaluate the occurrence of functional groups of phytoplankton in two reservoirs (Billings and Guarapiranga) ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066846 Sun, 01 Nov 2009 00:00:00 +0100 3066846 http://www.medworm.com/index.php?rid=3066845&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%3D19967172%26dopt%3DAbstract The fish community of the Sorocaba River Basin in different habitats (State of São Paulo, Brazil). Braz J Biol. 2009 Nov;69(4):1015-25 Authors: Smith W, Petrere M, Barrella W A fish assemblage study was accomplished in different habitats of the Sorocaba River Basin. Fish were caught with gillnets, were weighed (weight total - g) and measured (standard length - mm). Several abiotic variables of selected sampling sites were measured in order to characterise their habitats in order to attempt establishing correlations with fish community traits. Fish numbers per species were adjusted to the lognormal and logseries species/abundance models The fish community totaled 38 species, distributed in 28 genera, 14 families and 4 orders. Diversity was calculated both in number and in w... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066845 Sun, 01 Nov 2009 00:00:00 +0100 3066845 http://www.medworm.com/index.php?rid=3066844&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%3D19967173%26dopt%3DAbstract Authors: Faria L, Costa M Food webs usually display an intricate mix of trophic interactions where multiple prey are common. In this context omnivory has been the subject of intensive analysis regarding food web stability and structure. In a three species omnivory setting it is shown that the modeling of prey preference by the top predator may exert a strong influence on the short as well as on the long term dynamics of the respective food web. Clearly, this has implications concerning the stability and the structure of omnivory systems under disturbances such as nutrient enrichment. PMID: 19967173 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066844 Sun, 01 Nov 2009 00:00:00 +0100 3066844 http://www.medworm.com/index.php?rid=3066843&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%3D19967174%26dopt%3DAbstract Authors: Koening M, Wanderley B, Macedo S This research was carried out to assess phytoplankton diversity, distribution and ecology on the Pernambuco Continental Shelf and Oceanic region (lat. 7 masculine 33' 00' S to 8 masculine 41' 50' S and long. 34 masculine 04' 47' W to 35 masculine 01' 20' W). Samples were collected during the Joint Oceanographics Projects (JOPS II-Leg 5) by double oblique hauls with a baby bongo net 64 microm mesh size at depth between 14 and 150 m in inshore and offshore waters respectively, in seven transects, totaling 34 stations. The temperature and salinity characterised the tropical water masses. The dissolved oxygen was oversaturated in all stations. The nutrient-low concentrations showed an oligothrophic pattern in the whole area. 173 specific and infras... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066843 Sun, 01 Nov 2009 00:00:00 +0100 3066843 http://www.medworm.com/index.php?rid=3066841&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%3D19967175%26dopt%3DAbstract Socio-economic characteristics of the Cachoeira de Emas small-scale fishery in Mogi-Guaçu River, State of São Paulo, Brazil. Braz J Biol. 2009 Nov;69(4):1047-58 Authors: Peixer J, Petrere Júnior M Fishing in the area of Cachoeira de Emas dates from the aboriginal Painguás who inhabited its margins. The socioeconomic conditions of the fishers and fishing are described, derived from personal interviews with 33 fishers. Their mean age is 48.6 years and they have been fishing on average for 24.2 years. The monthly total raw income is US$ 575.52 and the raw income just from fishing is of US$ 239.64 per fisher. Most of them (66.6%) have only incomplete primary and junior education. The main capture species are curimba Prochilodus lineatus, piapara Leporinus obtusi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066841 Sun, 01 Nov 2009 00:00:00 +0100 3066841 http://www.medworm.com/index.php?rid=3066839&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%3D19967176%26dopt%3DAbstract Authors: Garcia M, Odebrecht C The detailed description of rarely recorded Thalassiosira species in Brazil is presented with light microscope (LM) and scanning electron microscope (SEM) illustrations. A total of 78 phytoplankton net samples (20 microm) collected between the years 2000 and 2006 in coastal waters of southern Brazilian, Cassino Beach and the estuary of Lagoa dos Patos, were studied in cleaned material using the Axiovert Zeiss LM and Jeol 6060 SEM. Water temperature and salinity of samples and six species are presented: Thalassiosira endoseriata, T. hendeyi, T. lundiana, T. minuscula, T. oceanica and T. wongii. Two species, Thalassiosira hendeyi and T. endoseriata were the most common being observed in all seasons at Cassino Beach in a wide temperature range (10-26 masculi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066839 Sun, 01 Nov 2009 00:00:00 +0100 3066839 http://www.medworm.com/index.php?rid=3066838&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%3D19967177%26dopt%3DAbstract Authors: Oprea M, Esbérard C, Vieira T, Mendes P, Pimenta V, Brito D, Ditchfield A In Brazil, restingas are under severe human-induced impacts resulting in habitat degradation and loss and remain one of the less frequently studied ecosystems. The main objectives of the present study are to describe the bat community in a restinga in Paulo Cesar Vinha State Park, Guarapari municipality, state of Espírito Santo, southeastern Brazil. Fieldwork was conducted twice a month from August 2004 to September 2005. A total sampling effort of 40,300 m(2)/h, represents the largest sampling effort for sampling bats in restingas to date. Bats were sampled in five different vegetational types in the area. Captured bats were processed recording information on species, sex, age, forearm length ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066838 Sun, 01 Nov 2009 00:00:00 +0100 3066838 http://www.medworm.com/index.php?rid=3066837&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%3D19967178%26dopt%3DAbstract We describe the fishing and the socio-economic status of the sport fishers. Most of the fishers are men, coming from the state of São Paulo, with a mean family income of US$ 1,212.3 (R$ 2,558.10, US$ 1 = R$ 2.11, July/2007), being aged 50.2 years old on average. A large amount of them (49.5%) only have incomplete first grade education. The main captured species are curimba Prochilodus lineatus, mandi Pimelodus maculatus, P. heraldoi, Pimelodella spp., lambari Astyanax fasciatus, A. schubarti, A. altiparanae, Roeboides paranensis and piava Leporinus lacustris, L. friderici, L. octofasciatus. Fishers have had a strong connection with this place for many years and even with low captures (2.8 kg/day), they are quite satisfied. PMID: 19967178 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066837 Sun, 01 Nov 2009 00:00:00 +0100 3066837 http://www.medworm.com/index.php?rid=3066836&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%3D19967179%26dopt%3DAbstract Primate community of the tropical rain forests of Saracá-Taqüera National Forest, Pará, Brazil. Braz J Biol. 2009 Nov;69(4):1091-9 Authors: Oliveira L, Loretto D, Viana L, Silva-Jr J, G Fernandes W Brazil is the richest country in the world in terms of primate species and the Amazonian rain forest is one of the richest biomes containing 15 (ca. 90%) of the Neotropical primate genera. Although considered key elements in conservation strategies, there is only anecdotal information on primates for several protected areas within the region. Here we present new data on the community composition of the primates in the Saracá-Taqüera National Forest (429,600 ha), an actively mined, bauxite rich area, in Pará, Brazil. We used information from the literatur... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066836 Sun, 01 Nov 2009 00:00:00 +0100 3066836 http://www.medworm.com/index.php?rid=3066835&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%3D19967180%26dopt%3DAbstract Attractionof Schistosoma mansoni Sambon, 1907 miracidia to Biomphalaria glabrata (Say, 1818) in the presence of Angiostrongylus costaricensis Morera and Céspedes, 1971 infection. Braz J Biol. 2009 Nov;69(4):1101-1105 Authors: Guerino L, Linhares A, Magalhães L, Zanotti-Magalhães E The attraction exerted by Biomphalaria glabrata infected with Angiostrongylus costaricensis on Schistosoma mansoni miracidia of the BH strain was tested, using a glass apparatus composed by two circular chambers connected to a channel. One mollusk or a sample of a snail conditioning water (SCW) was placed in one of the chambers, randomly selected, and the remaining of the apparatus was filled with chlorine-free water. Ten miracidia were placed in the centre of the channel and their beha... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066835 Sun, 01 Nov 2009 00:00:00 +0100 3066835 http://www.medworm.com/index.php?rid=3066834&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%3D19967181%26dopt%3DAbstract Biodiversity and ecology of Hirudinea (Annelida) from the Natural Reserve of Isla Martín García, Río de la Plata, Argentina. Braz J Biol. 2009 Nov;69(4):1107-13 Authors: César I, Martín S, Gullo B, Liberto R The Island of Martin Garcia lies at the confluence of the Uruguay and Paraná Rivers (upper Río de la Plata). This island is an outcrop of the crystalline basement. Due to basalt exploitation the island exhibits several ponds covered by carpets of free-floating macrophytes. Seven major environmental variables were measured: water and air temperature, percentage of oxygen saturation, dissolved oxygen, electrical conductivity, total dissolved solids and pH. Eleven leech species were found, Helobdella striata, H. diploides, H. adiastola and H.... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066834 Sun, 01 Nov 2009 00:00:00 +0100 3066834 http://www.medworm.com/index.php?rid=3066821&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%3D19967182%26dopt%3DAbstract Distribution of Deroceras reticulatum (Müller, 1774) (Pulmonata Stylommatophora) in Argentina with first record of the Reserva de Usos Múltiples Isla Martin Garcia, Río de la Plata superior. Braz J Biol. 2009 Nov;69(4):1115-9 Authors: Martín S, César I, Liberto R Deroceras reticulatum is a misanthropic European species spread widely throughout South America. At the moment this species is considered a 'pest' in direct sowing such as maize, soybean, sunflower, wheat, alfalfa and clovers, among others. The aim of this paper is to report the first record of D. reticulatum in the Reserva de Usos Multiples Isla Martín García, Buenos Aires province and to provide information about this species distribution in five Argentina provinces. PMID: 19967... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066821 Sun, 01 Nov 2009 00:00:00 +0100 3066821 http://www.medworm.com/index.php?rid=3066814&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%3D19967183%26dopt%3DAbstract Authors: Silva E, Reis P, Carvalho T, Altoé B Gerbera (Gerbera jamesonii Bolus and Hook,) is an ornamental Asteraceae of great commercial value, and pests can affect adversely its cultivation. More than 20 species of arthropods cause economic damage on gerbera, among them the two spotted mite, Tetranychus urticae Koch, 1836 (Acari: Tetranychidae), considered a key pest for this and other ornamental plants. In this work, some life-cycle aspects of T. urticae on gerbera, considered important for the knowledge of its population dynamics and for pest management programs, were studied. Mites were reared on 3-cm diameter arenas of gerbera leaf discs maintained on distilled water in Petri dishes, under laboratory conditions of 25 masculineC, 70 +/- 10% RU and 14-hour photophase, with onl... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066814 Sun, 01 Nov 2009 00:00:00 +0100 3066814 http://www.medworm.com/index.php?rid=3066813&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%3D19967184%26dopt%3DAbstract Authors: Moreira J, Eagle M, Gillespie O, Davidson A, Marriott F, Macdonald D A model was constructed to predict monthly birth probabilities using mammalian fertility data. We used a sample of 147 female capybaras (Hydrochoerus hydrochaeris) hunted on a farm on Marajó Island, Brazil. In the model each month was treated as a multinomial with six cells representing the six possible reproductive states (five months gestation). A hypothesis test was carried out to see whether a cosine curve would fit the birth probabilities. The results offer no support for a seasonal component (F2,9 = 1.84, P = 0.21), whereas results from a direct census do (F3,23 = 87.29, P < 0.01). Some hunting techniques were biased towards killing pregnant females (chi(2)1= 7.2, P< 0.01), thereby spreading ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066813 Sun, 01 Nov 2009 00:00:00 +0100 3066813 http://www.medworm.com/index.php?rid=3066810&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%3D19967185%26dopt%3DAbstract This study established protocols that can be useful tools in the study of immune mechanisms of the tropical fish pacu. PMID: 19967185 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066810 Sun, 01 Nov 2009 00:00:00 +0100 3066810 http://www.medworm.com/index.php?rid=3066809&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%3D19967186%26dopt%3DAbstract Authors: Ribeiro J, Andrade S, Bastos J, Maistro E The genotoxic effect of the Austroplenckia populnea chloroform fraction from barkwood extract was tested in vivo on peripheral blood cells of Swiss mice with the comet assay (SCGE), and the clastogenic effect was investigated on peripheral blood cells of Swiss mice and bone marrow cells of Wistar rats, with the micronucleus and chromosome aberrations tests. The animals were treated by gavage with 3 concentrations of the extract: 300, 600 and 900 mg.kg-1. Peripheral blood cells of Swiss mice were collected 4 and 24 hours after the treatment to the SCGE assay and 48 and 72 hours to the micronucleus test. Bone marrow cells of Wistar rats were collected 24 hours after the treatment to the micronucleus and chromosome aberration tests. The r... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066809 Sun, 01 Nov 2009 00:00:00 +0100 3066809 http://www.medworm.com/index.php?rid=3066808&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%3D19967187%26dopt%3DAbstract This study intended to characterize the behavior of F.xanthopterygius and evaluate the damage to the flowering and in the reproduction of H. serratifolius. Four individuals of H. serratifolius were observed for 60 hours to register size of groups, the time and duration of visit, and the number of flowers predated by F.xanthopterygius. The groups that visited the plants had between 2 and 12 individuals. The mean time of visits was 60.31 minutes (+/-22.29). The size of groups was correlated to number of flowers predated and was influenced by number of flowers offered. During the flowering, each H. serratifolius individual loses approximately 1,052 flowers per week. PMID: 19967187 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066808 Sun, 01 Nov 2009 00:00:00 +0100 3066808 http://www.medworm.com/index.php?rid=3066807&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%3D19967188%26dopt%3DAbstract Authors: Avelar W, Cunha A Diplodon rhombeus fontainianus (Orbigny, 1835), belongs to the family Hyriidae Swainson 1840, the distribution of which is restricted to South America and Australasia. This species, endemic to Brazil, occurs in the central-southern geographical region, Upper Paraná Basin and Atlantic Microbasins Espirito Santo to Paraná states. The mollusk lives buried in muddy substrata, has similar sized adductor muscles, and is dioecious, lacking sexual dimorphism. The apertures are simple (type AII of Yonge, 1948, 1957) as in Diplodon rotundus gratus, Castalia undosa martensi, Castalia undosa undosa and mantle fusion is present only in the base of the exalant aperture. The inhalant aperture exhibits tentacles originating from the inner fold while the exhalant ap... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066807 Sun, 01 Nov 2009 00:00:00 +0100 3066807 http://www.medworm.com/index.php?rid=3066806&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%3D19967189%26dopt%3DAbstract In this study we observed the effect of a nonsteroidal anti-inflammatory drug, naproxen, used in the treatment of degenerative articular diseases, during the process of actinotrichia regeneration. For this purpose, regenerating tissue from animals in contact with the drug was submitted to histochemical and ultrastructural analysis in comparison to tissue from animals under normal conditions, i.e., not in contact with the drug in question. Actinotrichia regeneration was similar in both animals, indicating that naproxen, at the dose used in the present study, did not interfere with actinotrichia synthesis during the regenerative process of the tail fin. This could be because naproxen did not influence the expression of the genes required for the regeneration process, such as the Sonic hedgeh... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066806 Sun, 01 Nov 2009 00:00:00 +0100 3066806 http://www.medworm.com/index.php?rid=3066805&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%3D19967190%26dopt%3DAbstract Authors: Fischer A, Hazin F, Carvalho F, Viana D, Rêgo M, Wor C One hundred seventeen specimens of sharks were caught along the coast of Pernambuco State, Northern Brazil, between May 2004 and May 2007, among which 86 were blacknose sharks, Carcharhinus acronotus, enabling a more detailed study of the species. Blacknose sharks were caught in the 2 study areas along the Boa Viagem/Piedade and Paiva beaches, accounting for the highest relative abundance among the species caught (73.5% of total). Potentially dangerous sharks, tiger and bull sharks, were also caught in the same areas, whereas hammerhead and blacktip sharks were only captured off Boa Viagem/Piedade. Concerning the blacknose shark, the total length (TL) ranged from 39.0 to 180.0 cm. Among the 38 females analysed, 32 wer... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066805 Sun, 01 Nov 2009 00:00:00 +0100 3066805 http://www.medworm.com/index.php?rid=3066804&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%3D19967191%26dopt%3DAbstract Authors: Almeida W, Sales D, Santana G, Vieira W, Ribeiro S, Alves R, Nóbrega R Raillietiella gigliolii is a Neotropical pentastomid parasite found in Amphisbaena alba. Collections were made in northeastern Brazil in a remnant area of Atlantic Forest (07 masculine 10' S and 35 masculine 05' W) in the municipality of Cruz do Espírito Santo, Paraíba State, and in a Humid Forest area (07 masculine 16' S and 39 masculine 26' W) on the slopes of the Chapada do Araripe Mountains, municipality of Crato, Ceará state, Brazil. Nine specimens of A. alba and 12 of A. vermicularis were collected to gather basic ecological data (prevalence and mean intensity of infection) concerning these parasites. Raillietiella gigliolii was found infecting the lungs of both species. The preval... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066804 Sun, 01 Nov 2009 00:00:00 +0100 3066804 http://www.medworm.com/index.php?rid=3066803&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%3D19967192%26dopt%3DAbstract This study was carried out in the Parque Municipal das Araucárias, located in the municipality of Guarapuava (PR) from May (06) to April (07). Its aim was to investigate which plants are used by Megachile (Moureapis) sp in provisioning of larvae, and to verify if this bee is oligolectic or polilectic. The collection of the plants was carried out during the bees activity period and in an area covering a 500 m radius from where the nests had been built. A sample of pollens from founded nests and from flowers was used to make permanent slides using the acetolysis method and with the aid of a light microscope, all pollen grains were examined in order to identify the plants used by this bee. A total of 80 pollen grain slides, from 16 nests were analysed. Although 99 plants were collected c... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066803 Sun, 01 Nov 2009 00:00:00 +0100 3066803 http://www.medworm.com/index.php?rid=3066802&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%3D19967193%26dopt%3DAbstract CONCLUSION: Ascorbic acid was shown to have anti-inflammatory and healing effects, guaranteeing a suiTable environment and conditions for faster skin repair. PMID: 19967193 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066802 Sun, 01 Nov 2009 00:00:00 +0100 3066802 http://www.medworm.com/index.php?rid=3066801&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%3D19967194%26dopt%3DAbstract Authors: Silva W PMID: 19967194 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066801 Sun, 01 Nov 2009 00:00:00 +0100 3066801 http://www.medworm.com/index.php?rid=3066789&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%3D19967195%26dopt%3DAbstract Authors: Onody H, Melo I, Penteado-Dias A, Dias-Filho M PMID: 19967195 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066789 Sun, 01 Nov 2009 00:00:00 +0100 3066789 http://www.medworm.com/index.php?rid=3066783&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%3D19967196%26dopt%3DAbstract First record of a humpback whale, Megaptera novaeangliae (Borowski, 1781), stranding in Pará State, Northern coast of Brazil. Braz J Biol. 2009 Nov;69(4):1207-8 Authors: Pretto Dj, Andrade M, Oliveira J, Oliveira M PMID: 19967196 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066783 Sun, 01 Nov 2009 00:00:00 +0100 3066783 http://www.medworm.com/index.php?rid=3066782&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%3D19967197%26dopt%3DAbstract Authors: Arouca R, Penteado-Dias A PMID: 19967197 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=3066782 Sun, 01 Nov 2009 00:00:00 +0100 3066782 http://www.medworm.com/index.php?rid=2863277&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%3D19802433%26dopt%3DAbstract Authors: PMID: 19802433 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863277 Fri, 31 Jul 2009 23:00:00 +0100 2863277 http://www.medworm.com/index.php?rid=2863276&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%3D19802434%26dopt%3DAbstract Diet and feeding activity of Acestrorhynchus lacustris (Lütken, 1875) (Characiformes, Acestrorhynchidae) in the water reservoir at Ribeirão Claro, SP. Braz J Biol. 2009 Aug;69(3):757-62 Authors: Silva AT, Goitein R A. lacustris is a widely distributed species in the São Francisco and Paraná river basins, mainly in lentic waters. Specimens were captured monthly, over a whole year in a reservoir built by damming the Ribeirão Claro stream (SP). The stomach contents analyses showed a predominantly piscivorous diet. Feeding activity showed to be clearly less intense during winter, when all the sampling groups were compared. Despite the fact that the diet of A. lacustris presents a high diversity of prey-species, the prey size, their abundance and also behavi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863276 Fri, 31 Jul 2009 23:00:00 +0100 2863276 http://www.medworm.com/index.php?rid=2863275&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%3D19802435%26dopt%3DAbstract Authors: Pinto SR, Santos AM, Tabarelli M Seed predation by small rodents is an emerging theme in the ecology of modified landscapes. Here we investigate the role played by the small rodent Oryzomys oniscus as a seed predator of large-seeded trees in a large remnant of the Atlantic forest - the Coimbra forest (3,500 ha), Alagoas state, northeastern Brazil. O. oniscus was captured and identified by setting twenty 500 m long transects, each one composed of 25 traps 20 m apart. This procedure resulted in 483 trap-nights set during a 20-mo period. We used 692 seeds (>15 mm length) from ten local large-seeded tree species for the seed predation trials that basically consisted of three treatments: one seed on the ground freely accessed by vertebrates (unprotected seed), one seed totally p... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863275 Fri, 31 Jul 2009 23:00:00 +0100 2863275 http://www.medworm.com/index.php?rid=2863274&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%3D19802436%26dopt%3DAbstract This study evaluates morphometric variation among A. guerreronis populations throughout its occurrence area, relates this variation with historical sequence of records, looking for information on its biogeography. Samples of 27 populations from the Americas, Africa and Asia were analysed using Principal Component Analysis and Canonical Discriminant Analysis. Results showed significant morphometric variability of A. uerreronis throughout its distribution area, with a high variability among American populations and otherwise a high similarity among African and Asian populations. The geographic pattern of variation of mite populations observed supports the hypothesis that A. guerreronis originated in the Americas and was introduced into Africa and Asia. Some inferences related to taxonomy of ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863274 Fri, 31 Jul 2009 23:00:00 +0100 2863274 http://www.medworm.com/index.php?rid=2863273&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%3D19802437%26dopt%3DAbstract Authors: Negreiros NF, Rojas NE, Rocha O, Santos Wisniewski MJ The present study aimed at evaluating the composition, diversity and short-term temporal fluctuations of zooplankton communities in fish ponds. The study was carried out in two fish ponds, with 180 m(2) of water surface (6 x 30 m) each, located in the Aquiculture Centre of the Pindamonhangaba Fisheries Institute - São Paulo. The study was developed over eight weeks, from February 16 to April 6, 1998. The physical and chemical conditions of the water in the fish ponds were adequate for zooplankton development. The zooplanktonic community was characterised by high richness of species and a greater diversity was observed in the first fish pond, with a superior density of Rotifera. Temporal changes in zooplankton compositi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863273 Fri, 31 Jul 2009 23:00:00 +0100 2863273 http://www.medworm.com/index.php?rid=2863272&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%3D19802438%26dopt%3DAbstract Authors: Pontes JA, Pontes RC, Rocha CF We studied and compared parameters of the snake community of the Serra do Mendanha, Rio de Janeiro State, southeastern Brazil (22 degrees 48'-22 degrees 51' S and 43 degrees 31'-43 degrees 28' W), such as: abundance distribution, richness, species diversity and biomass, between forested areas, areas under regeneration and agriculture areas (banana plantations); to obtain information about the natural history and facilitate the development of future research. For capturing the snakes we used: pitfall traps, drift-fences and visual search (diurnal and nocturnal) along four transects for each habitat. The captured snakes were measured with a tape and caliper, weighed with dynamometers and sexed with the use of a catheter. The animals marked (with ve... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863272 Fri, 31 Jul 2009 23:00:00 +0100 2863272 http://www.medworm.com/index.php?rid=2863271&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%3D19802439%26dopt%3DAbstract Diet composition of Plagioscion squamosissimus (Heckel, 1840), a fish introduced into the Tietê River system. Braz J Biol. 2009 Aug;69(3):805-12 Authors: Stefani PM, Rocha O Plagioscion squamosissimus is a species from the Amazon basin that was introduced into the Tietê River system. The present study aimed to analyse the feeding habits of this species in Bariri Reservoir and to verify the possible occurrence of ontogenetic changes in its diet composition. The samples were gathered in four periods of the year: February, June, September and November 2003. The fish were gathered with different fishing net meshes in three different reservoir portions. The alimentary items found in the stomachs were identified to the lowest possible taxonomic level and had abundance, occu... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863271 Fri, 31 Jul 2009 23:00:00 +0100 2863271 http://www.medworm.com/index.php?rid=2863270&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%3D19802440%26dopt%3DAbstract In this study, we assessed the effects of a severe fire on the population structure and spatial distribution of Zanthoxylum rhoifolium, a widespread cerrado tree. We were interested to know the importance of the resprouting and sexual reproduction in regenerating the population. The study area had been for about six years protected from fire, before a severe fire at the end of the dry season in 2006. We sampled and measured all individuals of Z. rhoifolium found in 80 plots of 25 m(2). We found 149 individuals before the fire and 112 after the fire, of which 77 were resprouts from burned seedlings and saplings. We did not find significant differences between the population structure before and after the fire. The spatial distribution of the population remained clumped after the fire. Thus,... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863270 Fri, 31 Jul 2009 23:00:00 +0100 2863270 http://www.medworm.com/index.php?rid=2863269&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%3D19802441%26dopt%3DAbstract Authors: Nadai R, Henry R A river lateral lake (Coqueiral Lake marginal to Paranapanema River in its mouth zone into Jurumirim Reservoir, São Paulo, Brazil) presented fragmentation into four small isolated bodies of water during a prolonged drought period, disrupting the link with the river. The aim of this work was to compare the temporal modifications on zooplankton community structure (total abundance, species richness, and diversity) in the four water bodies. Zooplankton samplings and abiotic factor measurements were made in two periods--during isolation phase of the lake in relation to river and after re-establishment of hydrologic connectivity. A concentration effect on zooplankton abundance was recorded with drought progression, but without significant modifications in spec... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863269 Fri, 31 Jul 2009 23:00:00 +0100 2863269 http://www.medworm.com/index.php?rid=2863268&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%3D19802442%26dopt%3DAbstract Evaluation of the cytotoxic and genotoxic potential of water from the River Paraíba do Sul, in Brazil, with the Allium cepa L. test. Braz J Biol. 2009 Aug;69(3):837-42 Authors: Barbério A, Barros L, Voltolini JC, Mello ML This work investigated the cytotoxic and genotoxic potential of water from the River Paraíba do Sul (Brazil) using Allium cepa roots. An anatomo-morphological parameter (root length), mitotic indices, and frequency of micronuclei were analysed. Eight bulbs were chosen at random for treatment for 24 to 120 hours with the River water collected in the years of 2005 and 2006 from sites in the cities of Tremembé and Aparecida (São Paulo state, Brazil). Daily measurements of the length of the roots grown from each bulb were carried out throu... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863268 Fri, 31 Jul 2009 23:00:00 +0100 2863268 http://www.medworm.com/index.php?rid=2863267&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%3D19802443%26dopt%3DAbstract Authors: Silva IA, Batalha MA Ecological communities are the result of not only present ecological processes, such as competition among species and environmental filtering, but also past and continuing evolutionary processes. Based on these assumptions, we may infer mechanisms of contemporary coexistence from the phylogenetic relationships of the species in a community. We studied the phylogenetic structure of plant communities in four cerrado sites, in southeastern Brazil. We calculated two raw phylogenetic distances among the species sampled. We estimated the phylogenetic structure by comparing the observed phylogenetic distances to the distribution of phylogenetic distances in null communities. We obtained null communities by randomizing the phylogenetic relationships of the regiona... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863267 Fri, 31 Jul 2009 23:00:00 +0100 2863267 http://www.medworm.com/index.php?rid=2863266&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%3D19802444%26dopt%3DAbstract We present the distribution of Cu in water, sediments and biomass from intensive shrimp (Litopenaeus vannamei Boone, 1931)) farming in northeastern Brazil. The results show no difference in dissolved Cu concentrations between waters entering and leaving the ponds. However, there was a large export of particulate Cu to adjacent environments, showed by extremely high particulate (112 microg.L-1) Cu concentrations in draining waters. Copper concentrations in the bottom sediments of the pond varied with depth from 10 to 20 microg.g-1, being 5 to 7 times higher than the local background. Pond management procedures result in a peculiar vertical distribution of Cu with peak values occurring at sub-surface depths in pond bottom sediments. Bioavailable Cu reaches about 20% of the total Cu content i... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863266 Fri, 31 Jul 2009 23:00:00 +0100 2863266 http://www.medworm.com/index.php?rid=2863265&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%3D19802445%26dopt%3DAbstract Authors: Silva-Stenico ME, Pacheco FT, Pereira-Filho ER, Rodrigues JL, Souza AN, Etchegaray A, Gomes JE, Tsai SM It is well known that citrus plants that have been infected by Xylella fastidiosa display nutritional deficiencies, probably caused by production of extracellular polymers by the bacteria that block normal nutrient flow through the xylem. The aim of this work was to study the mineral composition of specific foliar areas in different stages of infection in citrus. Thus, the concentrations of macro and micronutrients in leaves of citrus infected by X. fastidiosa were measured. Samples from four infected citrus orchards in the State of São Paulo, Brazil, were respectively collected from Santa Rita do Passa Quatro, Neves Paulista, Gavião Peixoto and Paraíso counti... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863265 Fri, 31 Jul 2009 23:00:00 +0100 2863265 http://www.medworm.com/index.php?rid=2863264&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%3D19802446%26dopt%3DAbstract Authors: Pereira FF, Zanuncio JC, Serrão JE, Pastori PL, Ramalho FS The mass rearing of parasitoids represents a fundamental stage for programmes of biological control. The progeny of the parasitoid Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae) were evaluated on previously refrigerated pupae of Bombyx mori L. (Lepidoptera: Bombycidae). Forty-eight to 72 hours-old pupae of B. mori were stored at 10 degrees C for five, 10, 15 or 20 days and then exposed to parasitism by P. elaeisis females. This parasitoid showed shorter duration of the life cycle when reared on pupae of B. mori which were previously stored at 10 degrees C during 15 days. P. elaeisis parasitized 100% of the pupae of B. mori after storage at 10 degrees C during all periods with emergence of this... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863264 Fri, 31 Jul 2009 23:00:00 +0100 2863264 http://www.medworm.com/index.php?rid=2863263&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%3D19802447%26dopt%3DAbstract Authors: Tófoli CF, Rohe F, Setz EZ Food habits of jaguarundi (Puma yagouaroundi) (Geoffroy, 1803) (Carnivora, Felidae) were studied between November 2000 and November 2001, in a 24.9 km(2) area of secondary Atlantic Rainforest and eucalypt plantation, in the Serra de Paranapiacaba, São Paulo State, Brazil. Analyses of 26 fecal and regurgitate samples, obtained over a stretch of 570.1 km, showed the consumption of 19 prey items and 74 prey occurrences. Small mammals were the most frequent food item (42.5%), followed by birds (21%), reptiles (14%) and medium-sized mammals (3%). The percent occurrence (PO) suggests that the diet consisted mainly of small rodents (30%) and birds (21%). We recorded for the first time the predation of Viperidae snakes by P. yagouaroundi. Although ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863263 Fri, 31 Jul 2009 23:00:00 +0100 2863263 http://www.medworm.com/index.php?rid=2863262&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%3D19802448%26dopt%3DAbstract Authors: Albuquerque FS, Peso-Aguiar MC, Assunção-Albuquerque MJ, Gálvez L The length-weight relationship and condition factor have been broadly investigated in snails to obtain the index of physical condition of populations and evaluate habitat quality. Herein, our goal was to describe the best predictors that explain Achatina fulica biometrical parameters and well being in a recently introduced population. From November 2001 to November 2002, monthly snail samples were collected in Lauro de Freitas City, Bahia, Brazil. Shell length and total weight were measured in the laboratory and the potential curve and condition factor were calculated. Five environmental variables were considered: temperature range, mean temperature, humidity, precipitation and human density. Mult... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863262 Fri, 31 Jul 2009 23:00:00 +0100 2863262 http://www.medworm.com/index.php?rid=2863261&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%3D19802449%26dopt%3DAbstract Authors: Garcia LC, Barros FV, Lemos-Filho JP 'Canga' is a name given to the ferruginous rocky fields that can be found in the 'Quadrilátero Ferrífero' of Minas Gerais, Brazil. The endemism and species richness make them areas of special biological importance, regarded as high-priority for conservation. Nevertheless, they are being threatened by intense mining activity. Aiming to understand more about this flora, this study was performed in order to determine the maturation or dispersal period of the fruits of four Canga species, Alibertia vaccinioides K.Schum. (Rubiaceae), Coccoloba acrostichoides Cham. (Polygonaceae), Miconia sellowiana Naudin (Melastomataceae), and one probable new species of Calyptranthes Sw. (Myrtaceae). Although fruit maturation or dispersal tended to o... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863261 Fri, 31 Jul 2009 23:00:00 +0100 2863261 http://www.medworm.com/index.php?rid=2863260&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%3D19802450%26dopt%3DAbstract Authors: Cuglianna AM, Cordeiro NS, Luque JL A new species of dactylogyrid monogenean, Apedunculata discoidea gen. n., sp. n. is described and illustrated from the gills of the freshwater fish Prochilodus lineatus (Valenciennes, 1837) in pisciculture ponds from Pirassununga, São Paulo, Brazil. Diagnostic characters of the new genus and species are: 1) vagina dextrolateral slightly sclerotised, opening anteriorly at level of copulatory complex; 2) copulatory organ coiled with two counterclockwise rings; 3) Accessory piece distal and not articulated; 4) body disk-shaped, lacking a peduncle. PMID: 19802450 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863260 Fri, 31 Jul 2009 23:00:00 +0100 2863260 http://www.medworm.com/index.php?rid=2863259&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%3D19802451%26dopt%3DAbstract Authors: Rossi S, Sá-Rocha VM, Kinoshita D, Genoy-Puerto A, Zwarg T, Werneck MR, Sá-Rocha LC, Matushima ER Chelonia mydas is a sea turtle that feeds and nests on the Brazilian coast and a disease called fibropapillomatosis is a threat to this species. Because of this, it is extremely necessary to determine a methodology that would enable the analysis of blood leukocyte function in these sea turtles. In order to achieve this aim, blood samples were collected from C. mydas with or without fibropapillomas captured on the São Paulo north coast. Blood samples were placed in tubes containing sodium heparin and were transported under refrigeration to the laboratory in sterile RPMI 1640 cell culture medium. Leukocytes were separated by density gradient using Ficoll-PaqueTM Plus,... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863259 Fri, 31 Jul 2009 23:00:00 +0100 2863259 http://www.medworm.com/index.php?rid=2863258&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%3D19802452%26dopt%3DAbstract Authors: Fettuccia DC, da Silva VM, Simões-Lopes PC Analyses of non-metric characters of the skull and cervical vertebrae were performed among samples of dolphins of the genus Sotalia from the north, northeast and south Brazilian coast (S. guianensis) and also samples from the Amazon River Basin (S. fluviatilis) as part of an osteological descriptive study. The results demonstrated that there was a higher percentage of occurrence of fenestrae in the occipital region (66%) and cervical ribs in the cervical vertebrae (87%) in the riverine species. The vomer in wide shape was more frequent in the riverine species (57%), followed by the intermediate (32%) and narrow shape (11%), that was found to be more frequent in the marine species (66 to 76%). In relation to the lacerate anterior ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863258 Fri, 31 Jul 2009 23:00:00 +0100 2863258 http://www.medworm.com/index.php?rid=2863257&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%3D19802453%26dopt%3DAbstract Authors: Rocha-Barbosa O, Moraes e Silva RB The morphology of many organisms seems to be related to the environment they live in. Nonetheless, many snakes are so similar in their morphological patterns that it becomes quite difficult to distinguish any adaptive divergence that may exist. Many authors suggest that the microornamentations on the scales of reptiles have important functional value. Here, we examined variations on the micromorphology of the exposed oberhautchen surface of dorsal, lateral, and ventral scales from the mid-body region of Xenodontinae snakes: Sibynomorphus mikani (terricolous), Imantodes cenchoa (arboreal), Helicops modestus (aquatic) and Atractus pantostictus (fossorial). They were metallized and analyzed through scanning electron microscopy. All species displ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863257 Fri, 31 Jul 2009 23:00:00 +0100 2863257 http://www.medworm.com/index.php?rid=2863256&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%3D19802454%26dopt%3DAbstract Population biology of Trichomycterus sp. (Siluriformes, Trichomycteridae) in Passa Cinco stream, Corumbataí River sub-basin, São Paulo State, southeastern Brazil. Braz J Biol. 2009 Aug;69(3):925-34 Authors: Rondineli GR, Carmassi AL, Braga FM The aim of this work was to characterise the population of Trichomycterus sp. in Passa Cinco stream, regarding length structure, sex ratio, diet and reproductive aspects, in accordance with drought and rainy season periods and longitudinal gradient, as well as to analyse its corporal condition in a temporal dimension. Six samplings were accomplished with the use of electric fishing equipment in three different sites in Passa Cinco stream, contemplating sites of order two, three and four, during the months of May, July, September ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863256 Fri, 31 Jul 2009 23:00:00 +0100 2863256 http://www.medworm.com/index.php?rid=2863255&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%3D19802455%26dopt%3DAbstract Authors: Pires LA, Cardoso VJ, Joly CA, Rodrigues RR The germination response of Ocotea pulchella (Nees) Mez seeds to light, temperature, water level and pulp presence is introduced. The laboratory assays were carried out in germination chambers and thermal-gradient apparatus, whereas the field assays were performed in environments with distinct light, temperature and soil moisture conditions within a permanent parcel of Restinga forest of the Parque Estadual da Ilha do Cardoso, Cananéia, São Paulo. The seeds do not exhibit dormancy, they are non photoblastic, and a loss of viability in dry stored seeds can be related to a decrease in water content of the seed. The presence of the pulp and the flooded substratum influenced negatively the germination of O. pulchella seeds test... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863255 Fri, 31 Jul 2009 23:00:00 +0100 2863255 http://www.medworm.com/index.php?rid=2863254&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%3D19802456%26dopt%3DAbstract The objective of this study was to identify aphid species collected in peach orchards (Prunus persica Batsch) and to determine their faunal indices for occurrence and dominance. The experiment was conducted from July 2005 to September 2006 in six Chimarrita peach orchards in the municipality of Araucária, PR, Brazil. The survey of aphid species was conducted by visual samplings on peach trees and using Möericke-type yellow traps containing water. A faunal analysis was made using aphid occurrence and dominance indices. Brachycaudus persicae (Passerini, 1860) was the only aphid species that was found colonizing peach in Araucária/PR. Although most aphids collected were classified as rare, some can be considered potential peach colonizers, such as Myzus persicae (Sulzer, 1776) ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863254 Fri, 31 Jul 2009 23:00:00 +0100 2863254 http://www.medworm.com/index.php?rid=2863253&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%3D19802457%26dopt%3DAbstract Authors: Couri MS, Marques B Graphomya Robineau-Desvoidy (Diptera, Muscidae) occurs in temperate and tropical regions of the world. It is known in the Neotropical Region from fifteen species. The genus is here recorded for the first time from Costa Rica, on the basis of three species: G. auriceps Malloch, 1934; G. mexicana Giglio-Tos, 1893 and G. tropicalis Malloch, 1934. A key for the recognition of these three species is given. G. auriceps is redescribed, including the morphology of male and female terminalia and the male of G. tropicalis is described for the first time. For G. mexicana, a well-known species in the literature, only a brief diagnosis and the material examined are listed. PMID: 19802457 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863253 Fri, 31 Jul 2009 23:00:00 +0100 2863253 http://www.medworm.com/index.php?rid=2863252&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%3D19802458%26dopt%3DAbstract This study contributes to a better understanding of the inflammatory response and infectious processes in native fish. PMID: 19802458 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863252 Fri, 31 Jul 2009 23:00:00 +0100 2863252 http://www.medworm.com/index.php?rid=2863251&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%3D19802459%26dopt%3DAbstract We present data on pulmonary infection rates by parasites in the lizards Tropidurus hispidus Spix, 1825 and T. semitaeniatus (Spix, 1825) living sympatrically in the Chapada do Araripe mountain Range, northeastern Brazil. We found no parasite pulmonary infection in T. semitaeniatus. However, two pulmonary parasite species were found in the T. hispidus hosts, the pentastomid Raillietiella mottae Almeida, Freire and Lopes, 2008 and the nematode Rhabdias sp. Overall prevalence was 5%. Prevalence of R. mottae was 2.5% and corresponded to only one parasite on each infected host. Prevalence of Rhabdias sp. was 2.5% and the range of infection was 1-2 parasites per host. This represents the first record of Rhabdias infecting lizards of the family Tropiduridae in the Neotropical region. Furthermore... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863251 Fri, 31 Jul 2009 23:00:00 +0100 2863251 http://www.medworm.com/index.php?rid=2863250&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%3D19802460%26dopt%3DAbstract Authors: Carvalho AF, Portela MC, Sousa MB, Martins FS, Rocha FC, Farias DF, Feitosa JP This work aims to assess the potential of the green seaweed Ulva fasciata Delile as an alternative source of dietary fibre (DF). Total DF content was determined, some of its physico-chemical properties described and the physiological effects of U. fasciata meal on rats fed a hypercholesterolemic diet were investigated. U. fasciata may be considered a potential alternative source of DF with a total content of about 400 g.kg-1 (dry basis) and interesting physico-chemical properties: water retention capacity of 8.74 g/water.g-1 dry sample (seaweed meal) and 0.90 (seaweed carbohydrate extract), lipid adsorption capacity of 4.52 g/oil.g-1 dry sample (seaweed meal) and 5.70 (seaweed carbohydrate extract),... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863250 Fri, 31 Jul 2009 23:00:00 +0100 2863250 http://www.medworm.com/index.php?rid=2863249&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%3D19802461%26dopt%3DAbstract Authors: Darrigran G, Boeger W, Damborenea C, Maroñas M PMID: 19802461 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863249 Fri, 31 Jul 2009 23:00:00 +0100 2863249 http://www.medworm.com/index.php?rid=2863248&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%3D19802462%26dopt%3DAbstract Authors: Onody HC, Loffredo AP, Penteado-Dias AM PMID: 19802462 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863248 Fri, 31 Jul 2009 23:00:00 +0100 2863248 http://www.medworm.com/index.php?rid=2863247&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%3D19802463%26dopt%3DAbstract Authors: Penteado-Dias AM, Ramiro ZA PMID: 19802463 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2863247 Fri, 31 Jul 2009 23:00:00 +0100 2863247 http://www.medworm.com/index.php?rid=2782463&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%3D19738953%26dopt%3DAbstract Authors: PMID: 19738953 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782463 Sun, 31 May 2009 23:00:00 +0100 2782463 http://www.medworm.com/index.php?rid=2782462&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%3D19738954%26dopt%3DAbstract In this study, we evaluated the influence of various hydrological cycles on the feeding body condition of fish species of different trophic guilds in the Paraná River floodplain, as well as the impacts of upstream impoundments on fish conditions. Attributes of the river floods (duration, time of year, intensity, and variability in a given year) and the body condition, measured by the mean residuals of length-weight ratios, of the detritivorous, herbivorous, insectivorous, invertivores, omnivorous, piscivorous, and planktivorous species were evaluated. Fish were sampled during a period before (1986-1994) and after (2000-2004) the completion of filling of the Porto Primavera Reservoir, which is located upstream from the floodplain area under study. Three sub-basins in the floodplain wer... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782462 Sun, 31 May 2009 23:00:00 +0100 2782462 http://www.medworm.com/index.php?rid=2782461&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%3D19738955%26dopt%3DAbstract Periphytic algae of the Garças Lake, Upper Paraná River floodplain: comparing the years 1994 and 2004. Braz J Biol. 2009 Jun;69(2):459-68 Authors: Murakami E, Bicudo D, Rodrigues L The changes imposed by dams on hydrological regime, water transparence and nutrient concentrations downstream affect biodiversity in relation to species richness and specific composition of the community. The aim of this work was evaluate this effect on periphyton, comparing richness and composition of periphytic algae in the Garças Lake, Upper Paraná River floodplain, between the years 1994, before construction of the Porto Primavera Reservoir, and after its operation in 2004. This floodplain lake showed an increase in species, from 113 in 1994 to 159 in 2004. A few species, howe... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782461 Sun, 31 May 2009 23:00:00 +0100 2782461 http://www.medworm.com/index.php?rid=2782460&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%3D19738956%26dopt%3DAbstract Effects of flooding regime on the feeding activity and body condition of piscivorous fish in the Upper Paraná River floodplain. Braz J Biol. 2009 Jun;69(2):481-90 Authors: Luz-Agostinho K, Agostinho A, Gomes L, Júlio-Jr H, Fugi R Flood pulses affect floodplain enrichment via the incorporation of nutrients and terrestrial biomass. As a result, they positively affect the body condition of aquatic organisms. This paper evaluates whether the absence of floods (resulting from dam control) affects the feeding activity and body condition of piscivorous fish. In addition, whether piscivores respond similarly to alterations in the flooding regime was assessed. Five piscivorous species were selected (Acestrorhynchus lacustris, Hoplias aff. malabaricus, Plagioscion squamosissimu... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782460 Sun, 31 May 2009 23:00:00 +0100 2782460 http://www.medworm.com/index.php?rid=2782459&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%3D19738957%26dopt%3DAbstract In this study, data from 25 lakes of the Upper Paraná River floodplain were used to build models to predict chlorophyll-a and dissolved oxygen concentrations. Akaike's information criterion (AIC) was used as a criterion for model selection. Models were validated with independent data obtained in the same lakes in 2001. Predictor variables that significantly explained chlorophyll-a concentration were pH, electrical conductivity, total seston (positive correlation) and nitrate (negative correlation). This model explained 52% of chlorophyll variability. Variables that significantly explained dissolved oxygen concentration were pH, lake area and nitrate (all positive correlations); water temperature and electrical conductivity were negatively correlated with oxygen. This model explained 5... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782459 Sun, 31 May 2009 23:00:00 +0100 2782459 http://www.medworm.com/index.php?rid=2782458&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%3D19738958%26dopt%3DAbstract Interannual variability of phytoplankton in the main rivers of the Upper Paraná River floodplain, Brazil: influence of upstream reservoirs. Braz J Biol. 2009 Jun;69(2):501-16 Authors: Rodrigues L, Train S, Bovo-Scomparin V, Jati S, Borsalli C, Marengoni E The interannual variation of phytoplankton communities in the three main rivers of the Upper Paraná River floodplain is evaluated in relation to changes in the hydrosedimentological regime. These changes are a result of climatic variability and the formation of Porto Primavera Reservoir, located at the upper Paraná River. Phytoplankton species richness and density were investigated in rivers during a prior period (1993-1994) and eight years after reservoir impoundment (2000-2007). Multiple analyses were conducte... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782458 Sun, 31 May 2009 23:00:00 +0100 2782458 http://www.medworm.com/index.php?rid=2782457&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%3D19738959%26dopt%3DAbstract Spatial and temporal patterns of ciliate species composition (Protozoa: Ciliophora) in the plankton of the Upper Paraná River floodplain. Braz J Biol. 2009 Jun;69(2):517-27 Authors: Pauleto G, Velho L, Buosi P, Brão A, Lansac-Tôha F, Bonecker C Spatial and temporal patterns of plankton ciliates species composition in the Paraná River floodplain were investigated. Samplings were carried out in twelve environments in two distinct hydrological periods (limnophase and potamophase). A total of 61 species of ciliates were recorded, and among them 21 are classified as pelagic while 40 are considered preferentially as littoral species. The registered species belong to eleven orders, and among them, Prostomatida was the most specious followed by Hymenostomatida and P... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782457 Sun, 31 May 2009 23:00:00 +0100 2782457 http://www.medworm.com/index.php?rid=2782456&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%3D19738960%26dopt%3DAbstract This study evaluated the structure and stability of the rotifer community in response to changes in hydrological pulses after the Porto Primavera impoundment in the Upper Paraná River floodplain. The community was studied in a river and in a floodplain lake downstream of the dam over a four-year period before and after the impoundment. A decrease in species richness and abundance was observed soon after the impoundment, followed by an increase in these attributes and in specific diversity when the hydrometric level of the Paraná River rose and, consequently, increased the connectivity between the floodplain environments. Conochilus coenobasis, Filinia longiseta, Keratella cochlearis, Lecane proiecta and Polyarthra dolichoptera persisted throughout the study and contributed to com... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782456 Sun, 31 May 2009 23:00:00 +0100 2782456 http://www.medworm.com/index.php?rid=2782455&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%3D19738961%26dopt%3DAbstract Biodiversity of zooplankton communities in the Upper Paraná River floodplain: interannual variation from long-term studies. Braz J Biol. 2009 Jun;69(2):539-49 Authors: Lansac-Tôha F, Bonecker C, Velho L, Simões N, Dias J, Alves G, Takahashi E We investigated the effect of interannual variation of hydrosedimentological regime and connectivity on the zooplankton biodiversity in the Upper Paraná River floodplain. Zooplankton samplings were undertaken between 2000 and 2007, in different environments of the floodplain, including connected and isolated floodplain lakes, backwaters, rivers and channels. The zooplankton included 541 species. Rotifers showed the highest species richness and abundance. Among the zooplankton species, 71 represent new occurrence records... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782455 Sun, 31 May 2009 23:00:00 +0100 2782455 http://www.medworm.com/index.php?rid=2782454&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%3D19738962%26dopt%3DAbstract Exotic species of zooplankton in the Upper Paraná River floodplain, Daphnia lumholtzi Sars, 1885 (Crustacea: Branchiopoda). Braz J Biol. 2009 Jun;69(2):551-8 Authors: Simões N, Robertson B, Lansac-Tôha F, Takahashi E, Bonecker C, Velho L, Joko C The integrity of aquatic ecosystems is being challenged worldwide by invading species, which has been one of the frequent causes of biodiversity loss. The invader may cause extinctions of vulnerable native species through predation, grazing, competition and habitat alteration. Daphnia lumholtzi G. O. Sars, 1885, a native cladoceran from Australia, Southwestern Asia and North Africa, has recently been found in the Neotropical region. The D. lumholtzi records from the Upper Paraná River floodplain were restricted to th... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782454 Sun, 31 May 2009 23:00:00 +0100 2782454 http://www.medworm.com/index.php?rid=2782453&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%3D19738963%26dopt%3DAbstract Eight years of monitoring aquatic Oligochaeta from the Baía and Ivinhema Rivers. Braz J Biol. 2009 Jun;69(2):559-71 Authors: Behrend R, Fernandes S, Fujita D, Takeda A The aim of this study was to analyze the factors that influence spatial and temporal variations of the Oligochaeta assemblage in the Baía and Ivinhema Rivers, located in the Upper Paraná River floodplain (Mato Grosso do Sul State, Brazil). Samples of Oligochaeta were collected between February 2000 and November 2007. A total of 27 Oligochaeta species were identified. A Principal Component Analysis (PCA) of the physical and chemical variables was used to summarize the total variation in the data and to identify major environmental gradients. Detrended Correspondence Analysis (DCA) was conducted to v... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782453 Sun, 31 May 2009 23:00:00 +0100 2782453 http://www.medworm.com/index.php?rid=2782452&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%3D19738964%26dopt%3DAbstract Trophic position of bottom-feeding fish in the Upper Paraná River floodplain. Braz J Biol. 2009 Jun;69(2):573-581 Authors: Lopes C, Benedito E, Martinelli L The delta15N composition of bottom-feeding fish (iliophagous = Apareiodon affinis, Cyphocharax nagelii, Prochilodus lineatus, Steindachnerina brevipinna and S. insculpta; detritivorous = Loricariichthys platymetopon and Liposarcus anisitsi; benthophagous = Satanoperca pappaterra and Hoplosternum littorale) and their primary food sources were investigated in the upper Paraná River floodplain during rainy seasons in different environments (lotic and lentic). Two hypotheses were tested: i) that the trophic position and isotopic values of the investigated organisms (fish and food resources) vary spatially; and ii) tha... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782452 Sun, 31 May 2009 23:00:00 +0100 2782452 http://www.medworm.com/index.php?rid=2782451&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%3D19738965%26dopt%3DAbstract Environmental changes and human work in the region of the Upper Paraná River floodplain: processes and interactions. Braz J Biol. 2009 Jun;69(2):583-9 Authors: Tomanik E, Paiola L, Martínez-Fernández J, Fernandes S The environment and society constitute a complex of elements and interactions. Thus, an understanding of the processes in which the environment and psychosocial elements are involved may not be gained from knowledge of just one isolated variable. Based on such premises, the present paper, which summarizes the results of a series of studies, adopts work relationships as its main focus, but in addition, it has two complementary objectives. One is to present some analyses on the interaction between human actions and the environmental changes that have bee... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782451 Sun, 31 May 2009 23:00:00 +0100 2782451 http://www.medworm.com/index.php?rid=2782450&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%3D19738966%26dopt%3DAbstract Consequences of dam construction upstream of the Upper Paraná River floodplain (Brazil): a temporal analysis of the Chironomidae community over an eight-year period. Braz J Biol. 2009 Jun;69(2):591-608 Authors: Rosin G, Oliveira-Mangarotti D, Takeda A, Butakka C Our study aimed to identify patterns of temporal variation and changes in the structure of the community of Chironomidae larvae in two rivers in the Upper Paraná River floodplain after the construction of a reservoir upstream (Porto Primavera). Samples were taken with a Petersen grab, and were obtained between 2000 and 2007. Chironomidae larvae were identified down to the lowest taxonomic level possible. The high richness of Chironomidae observed in the Paraná and Ivinhema Rivers (100 morphospecies) in co... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782450 Sun, 31 May 2009 23:00:00 +0100 2782450 http://www.medworm.com/index.php?rid=2782449&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%3D19738967%26dopt%3DAbstract Authors: Algarte V, Siqueira N, Murakami E, Rodrigues L The aim of this study was to analyze the effects of flood pulses (intensity) on the richness and composition of periphytic algae in lentic environments of the Upper Paraná River floodplain, over a six-year period. Other factors, such as connectivity of the environments with the main channel of the river and the availability of substrate for the periphyton, were also evaluated. For qualitative analyses, periphyton community was sampled from adult petioles of Eichhornia azurea Kunth taken from the littoral regions of the lakes studied. A total of 457 taxa of periphytic algae, distributed within 141 genera and 10 classes, were registered in the four environments. The greatest richness of periphytic algae was observed in connecte... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782449 Sun, 31 May 2009 23:00:00 +0100 2782449 http://www.medworm.com/index.php?rid=2782448&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%3D19738968%26dopt%3DAbstract In this study, we describe the general patterns of aquatic macrophyte diversity in the Paraná River floodplain observed during six years of study. Temporal changes in community composition were also evaluated. Data on the presence or absence of aquatic macrophytes were collected between March 2002 and March 2008, in six lakes associated with three rivers. Different analytical strategies were used to evaluate the dynamics of aquatic macrophyte communities between the different systems in the floodplain. The composition of aquatic macrophytes differed among the rivers, mainly with respect to the different vegetation life forms (floating, submersed, emergent and rooted with floating stems). The temporal similarity of species composition during the six years and the beta-diversity index i... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782448 Sun, 31 May 2009 23:00:00 +0100 2782448 http://www.medworm.com/index.php?rid=2782447&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%3D19738969%26dopt%3DAbstract Environmental education in the Upper Paraná River floodplain, municipality of Porto Rico (Paraná State), Brazil. Braz J Biol. 2009 Jun;69(2):627-35 Authors: Obara A, Suzuki H, Takemoto R, Tomanik A, Corredato-Periotto T, Silva-Dias M Since 2003, researchers, faculty, graduate and undergraduate students from the State University of Maringá have been working alongside teachers from the state and local schools in the municipality of Porto Rico (Paraná State), located on the banks of the Paraná River. Their objective is to outline actions and strategies with the purpose of building methodological paths to insert environmental education into the school curriculum. Based on the action-research methodology, the group has developed the following programs: a) th... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782447 Sun, 31 May 2009 23:00:00 +0100 2782447 http://www.medworm.com/index.php?rid=2782446&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%3D19738970%26dopt%3DAbstract Phytoplankton diversity in the Upper Paraná River floodplain during two years of drought (2000 and 2001). Braz J Biol. 2009 Jun;69(2):637-47 Authors: Borges P, Train S Floodplain lakes and lotic environments of the High Paraná River floodplain present notable biodiversity, especially in relation to phytoplanktonic community. The goal of this work was to evaluate phytoplankton diversity (alpha, beta and gamma) in three subsystems during two years of drought (2000 and 2001). We sampled 33 habitats at the pelagic zone subsurface during February and August. Due to low hydrometric levels of the Paraná and Ivinhema Rivers, there was no clear distinction between the potamophase and limnophase periods for the two hydrosedimentological cycles analysed. We recorded 366 tax... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782446 Sun, 31 May 2009 23:00:00 +0100 2782446 http://www.medworm.com/index.php?rid=2782445&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%3D19738971%26dopt%3DAbstract In this study, we identified and characterized the hydrographic attributes related to the success of recruitment of migratory fishes in the Upper Paraná River floodplain. To achieve our objectives, we analyzed inter-annual variations in the abundance of young-of-the-year (YOY; index of recruitment) of six migratory species and their relations with hydrographic attributes. Recruitment was related to the intensity, duration (in different fluviometrical levels), elasticity, number of pulses, greater uninterrupted overflow and delay of the floods (all obtained using the PULSO software). Collections of fish were conducted in the period between January 1987 and November 2007 in distinct environments (river channels, secondary channels and connected and disconnected floodplain lakes) distrib... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782445 Sun, 31 May 2009 23:00:00 +0100 2782445 http://www.medworm.com/index.php?rid=2782444&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%3D19738972%26dopt%3DAbstract Biodiversity of non-marine ostracods (Crustacea, Ostracoda) in the alluvial valley of the upper Paraná River, Brazil. Braz J Biol. 2009 Jun;69(2):661-8 Authors: Higuti J, Lansac-Tôha F, Velho L, Martens K In the present study, we test the relevance of a number of environmental factors on alpha and beta ostracod diversities, at species and family level. Ostracods were sampled from several substrates, including sediment and root systems of various floating aquatic macrophytes, from 48 environments (both lentic and lotic habitats, ranging from the river itself, over connecting channels linking with open lakes, and, finally closed lakes), belonging to four different systems (Paraná, Ivinheima, Baía and Taquaruçu), in the alluvial valley of the Upper Paran&#... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782444 Sun, 31 May 2009 23:00:00 +0100 2782444 http://www.medworm.com/index.php?rid=2782443&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%3D19738973%26dopt%3DAbstract Effects of the hydrological regime on the ichthyofauna of riverine environments of the Upper Paraná River floodplain. Braz J Biol. 2009 Jun;69(2):669-80 Authors: Fernandes R, Agostinho A, Ferreira E, Pavanelli C, Suzuki H, Lima D, Gomes L In this work, spatial and temporal variations in the diversity (species richness and Simpson's Diversity Index) and abundance (indexed by the capture per unit effort - CPUE; total and for reproductive groups) of fish from three rivers (Baía, Ivinheima and Paraná) located in a floodplain of the Upper Paraná River basin were analyzed over a period of 20 years (1987-2007). In addition, we evaluated the relationships of these ecological attributes with variations in the hydrologic regime, considering the possible effects of nat... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782443 Sun, 31 May 2009 23:00:00 +0100 2782443 http://www.medworm.com/index.php?rid=2782442&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%3D19738974%26dopt%3DAbstract Genetic divergence between Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum (Siluriformes: Pimelodidae) in the Paraná River Basin. Braz J Biol. 2009 Jun;69(2):681-9 Authors: Bignotto Ts, Prioli A, Prioli S, Maniglia T, Boni T, Lucio L, Gomes V, Prioli R, Oliveira A, Júlio-Junior H, Prioli L Pseudoplatystoma corruscans (Spix and Agassiz, 1829) and Pseudoplatystoma reticulatum (Eingenmann and Eigenmann, 1889) are large migratory catfishes of high biological importance and great commercial value in South America. Because fertile crossbreeds can be artificially produced in hatcheries, a high genetic proximity between these two Pimelodidae species is conceivable. Possible escape of crossbred specimens from pisciculture stations is a serious environmental concer... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782442 Sun, 31 May 2009 23:00:00 +0100 2782442 http://www.medworm.com/index.php?rid=2782441&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%3D19738975%26dopt%3DAbstract Diversity of parasites of fish from the Upper Paraná River floodplain, Brazil. Braz J Biol. 2009 Jun;69(2):691-705 Authors: Takemoto R, Pavanelli G, Lizama M, Lacerda A, Yamada F, Moreira L, Ceschini T, Bellay S The aim of the present study was to provide a current survey of the species of parasites found in the Upper Paraná River floodplain, as well as to investigate which strategies and mechanisms used by parasites, are favored and which environmental factors influence the parasite community in the studied environments. During a seven-year period from February 2000 to September 2007, 3,768 fish belonging to 72 species were collected and analyzed for the purpose of studying the parasite fauna. A total of 337 species of parasites were reported, including 12 new descri... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782441 Sun, 31 May 2009 23:00:00 +0100 2782441 http://www.medworm.com/index.php?rid=2782440&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%3D19738976%26dopt%3DAbstract Evaluation of the Upper Paraná River discharge controlled by reservoirs. Braz J Biol. 2009 Jun;69(2):707-16 Authors: Souza Filho E The building of large dams in the Upper Paraná River basin altered the discharge regime at the Porto São José River section. The discharge regime has been altered since 1972, but the changes intensified after the Porto Primavera damming, in late 1998. Considering that discharge control affects the relationship between channel and floodplain, this work aimed to evaluate the intensity of the discharge control that resulted from the operation of the Porto Primavera Dam. To achieve this objective, statistical analyses were carried out based on the Porto São José Fluviometric Station historical series of river level readings... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782440 Sun, 31 May 2009 23:00:00 +0100 2782440 http://www.medworm.com/index.php?rid=2782439&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%3D19738977%26dopt%3DAbstract In this study, we used a long term data-set (eight years) collected in 10 habitats with different features (river channels, and connected and isolated lakes) to describe the spatial and temporal patterns of some of the principal limnological factors. In general, the degree of connectivity of the lakes, together with the rivers to which the lakes are connected, were important determinants of their limnological characteristics. These differences are expected, because rivers entering the floodplain come from different geological regions and are subject to different human impacts. At large spatial scales, these differences contribute to the increased habitat diversity of the floodplain and thus to its high biodiversity. With regard to temporal variation, Secchi-disk transparency increased, and... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782439 Sun, 31 May 2009 23:00:00 +0100 2782439 http://www.medworm.com/index.php?rid=2782438&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%3D19738978%26dopt%3DAbstract Species richness and abundance of bats in fragments of the stational semidecidual forest, Upper Paraná River, southern Brazil. Braz J Biol. 2009 Jun;69(2):727-34 Authors: Ortêncio-Filho H, Reis N The Upper Paraná River floodplain is inserted in a region of the Mata Atlântica biome, which is a critical area to preserve. Due to the scarcity of researches about the chiropterofauna in this region, the present study investigated species richness and abundance of bats in remnants from the stational semidecidual forest of the Upper Paraná River, southern Brazil. Samplings were taken every month, from January to December 2006, using 32 mist nets with 8.0 x 2.5 m, resulting in 640 m(2)/h and totaling a capture effort of 87,040 m(2)/h. In order to estimate the sp... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782438 Sun, 31 May 2009 23:00:00 +0100 2782438 http://www.medworm.com/index.php?rid=2782437&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%3D19738979%26dopt%3DAbstract Vascular flora of the Upper Paraná River floodplain. Braz J Biol. 2009 Jun;69(2):735-745 Authors: Souza M, Kawakita K, Slusarski S, Pereira G The purpose of this study was to update the floristic inventory found in the Upper Paraná River floodplain. Floristic surveys were performed from February 2000 through March 2008, as part of the Brazilian Long-Term Ecological Research Program (PELD/CNPq -Site 6). The material collected was identified from 774 species, 442 genera, and 116 families. The ten families with high species richness were Leguminosae, Poaceae, Rubiaceae, Asteraceae, Euphorbiaceae, Myrtaceae, Cyperaceae, Solanaceae, Sapindaceae, and Orchidaceae, which contributed to 46.1% of the total number of species. Genera with high richness were Solanum, Cyperus, Pani... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782437 Sun, 31 May 2009 23:00:00 +0100 2782437 http://www.medworm.com/index.php?rid=2782436&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%3D19738980%26dopt%3DAbstract On the possible extinction of bird species in the Upper Paraná River floodplain, Brazil. Braz J Biol. 2009 Jun;69(2):747-55 Authors: Mendonça L, Lopes E, Anjos L The Upper Paraná River floodplain (UPR) represents the last stretch of the Paraná River in Brazilian territory where a river-floodplain ecosystem still exists. However, the region had been subjected to intense deforestation in previous decades, and more than half of the original floodplain has been lost due to the construction of the Porto Primavera dam, which may have resulted in the local extinction of species. In the present study, we compared the list of bird species recorded before the construction of Porto Primavera dam (1926-1996) to that gotten afterwards (1999-2007) under the Long-Term Ecol... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2782436 Sun, 31 May 2009 23:00:00 +0100 2782436 http://www.medworm.com/index.php?rid=2703080&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%3D19675923%26dopt%3DAbstract Authors: Cianciaruso MV, Batalha MA In South America, the largest seasonal savanna region is the Brazilian cerrado. Our aim was to study temporal changes in some community descriptors, such as floristic composition, richness, species density, plant density, and cylindrical volume, in a seasonal cerrado, comparing it to a nearby hyperseasonal cerrado. In four different seasons, we placed randomly ten 1 m(2) quadrats in each vegetation form and sampled all the vascular plants. Seasonal changes in floristic composition, species density, and plant density were less pronounced in the seasonal than in the hyperseasonal cerrado. Floristic similarity between the vegetation forms was lower when the hyperseasonal cerrado was waterlogged. Richness and species density were higher in the seasonal c... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703080 Thu, 30 Apr 2009 23:00:00 +0100 2703080 http://www.medworm.com/index.php?rid=2703079&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%3D19675924%26dopt%3DAbstract Phytoplankton community: indicator of water quality in the Armando Ribeiro Gonçalves reservoir and Pataxó channel, Rio Grande do Norte, Brazil. Braz J Biol. 2009 May;69(2):241-51 Authors: Chellappa NT, Câmara FR, Rocha O The current study analysed spatial-temporal modifications of the phytoplankton community and water quality, during dry and wet seasons. The phytoplankton community was studied in three areas: Armando Ribeiro Gonçalves Reservoir (ARG), which is an important public use reservoir in RN, Pataxó Channel (PC-before water treatment), Itajá, RN, and after the water treatment (WTP). Water samples from the reservoir were collected during both dry (January, February and November, 2006) and wet seasons (March to June, 2006). Quali-quantitative... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703079 Thu, 30 Apr 2009 23:00:00 +0100 2703079 http://www.medworm.com/index.php?rid=2703078&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%3D19675925%26dopt%3DAbstract Composition and distribution of Darwinulidae (Crustacea, Ostracoda) in the alluvial valley of the upper Paraná River, Brazil. Braz J Biol. 2009 May;69(2):253-62 Authors: Higuti J, Lansac-Tôha FA, Velho LF, Pinto RL, Vieira LC, Martens K The occurrence and abundance of darwinulid ostracods, as well as environmental factors influencing these patterns, were investigated in the alluvial valley of the upper Paraná River. Ostracods were sampled from several substrates, like littoral sediments and pleuston, which included several aquatic macrophytes species, from 31 localities (lentic and lotic) belonging to different riverine systems. Eight darwinulid species were found, representing all genera from this family. Alicenula serricaudata, Vestalenula pagliolii, and Penthe... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703078 Thu, 30 Apr 2009 23:00:00 +0100 2703078 http://www.medworm.com/index.php?rid=2703077&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%3D19675926%26dopt%3DAbstract Authors: Maranho LT, Dziedzic M, Muñiz GI, Kuniyoshi YS, Galvão F Podocarpus lambertii Klotzsch ex Endl. (Podocarpaceae) is native and a member of the Pinophyta (Gymnosperm) of southern Brazil, locally known as 'pinheiro-bravo'. The present work aims to investigate the effects of petroleum on the tracheids dimensions. Wood samples from twenty individuals were studied along the stem, ten being exposed to pollution and ten used as a control set. The wood samples were collected from incisions at three levels: at the ground level, and one and two metres above the ground level. From these samples, sub-samples were selected at the border of the growth layers in the vascular cambium-medulla direction. The methodology followed that traditionally recommended for plant anatomy studies,... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703077 Thu, 30 Apr 2009 23:00:00 +0100 2703077 http://www.medworm.com/index.php?rid=2703076&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%3D19675927%26dopt%3DAbstract Determination of eutrophic areas in Mundaú/Manguaba lagoons, Alagoas-Brazil, through studies of the phytoplanktonic community. Braz J Biol. 2009 May;69(2):271-80 Authors: Melo-Magalhães EM, Medeiros PR, Lira MC, Koening ML, Moura AN Mundaú and Manguaba Lagoons (9 degrees 34' 38'-9 degrees 45' 30' S and 35 degrees 44' 00'-35 degrees 58' 13' W) are considered the largest and most productive ones in the state of Alagoas and were studied with the purpose of identifying the existence of anthropic impacts. Samples were collected at 8 stations, during low tide and flooding in rainy and dry periods, using the 'Van Dorn' bottle and plankton net. In total, 155 taxons were identified, with special emphasis on Bacillariophyta and Cyanophyta divisions. The most abundant speci... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703076 Thu, 30 Apr 2009 23:00:00 +0100 2703076 http://www.medworm.com/index.php?rid=2703075&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%3D19675928%26dopt%3DAbstract Authors: Marinho CC, Palma Silva C, Albertoni EF, Trindade CR, Esteves FA Alterations in methane concentration in the water column of aquatic systems is closely linked to the processes of production and consumption of this gas, i.e., methanogenesis and methanotrophy respectively. The aim of this research is to evaluate methane dynamics through diurnal variation in the concentration of this gas in the water column of two lakes differing in trophic status at the campus of Fundação Universidade do Rio Grande (FURG). In two sampling periods (November 2001 and July 2002) methane concentrations in the water column were significantly higher (3.66 and 0.41 micromoles.L-1, respectively) at Lago dos Biguás, with mesoeutrophic features when related to Lago Polegar (1.43 and 0.19 mi... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703075 Thu, 30 Apr 2009 23:00:00 +0100 2703075 http://www.medworm.com/index.php?rid=2703074&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%3D19675929%26dopt%3DAbstract This study aimed to characterize the structure of the herb stratum in relation to light availability in the Submontane Atlantic Rain Forest at the Carlos Botelho State Park, SP, Brazil. Fortyone 10 x10 m plots were established under the closed canopy (18 plots), small and medium canopy gaps (11) and large canopy gaps dominated by Guadua tagoara (Ness) Kunth (12). Inside each plot, the line intercept method was applied to assess soil coverage as an estimate of density of herb stratum vegetation. Hemispherical photographs were taken at the centre of the plots to evaluate the annual light regime. Overall, Calathea communis Wanderley and S. Vieira had the greater mean coverage, followed by woody seedlings, ground ferns and other herbs (mainly, Araceae, Acanthaceae, Amaranthaceae and Cyperaceae... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703074 Thu, 30 Apr 2009 23:00:00 +0100 2703074 http://www.medworm.com/index.php?rid=2703073&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%3D19675930%26dopt%3DAbstract Ecology of endoparasites of the fluvial stingray Potamotrygon falkneri (Chondrichthyes: Potamotrygonidae) from the upper Paraná River floodplain, Brazil. Braz J Biol. 2009 May;69(2):297-303 Authors: Lacerda AC, Takemoto RM, Pavanelli GC The present study investigated the ecological relationships between endoparasites and the host Potamotrygon falkneri from the upper Paraná River by using as indicators the host's relative condition factor (Kn), sex and hepatosomatic relation (HSR). Forty-seven specimens of P. falkneri were analyzed between March 2005 and September 2006. Statistical analysis showed that the Kn was positively correlated with the abundance of Acanthobothrium regoi and Rhinebothrium paratrygoni; only the abundance of A. regoi was positively correlated to t... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703073 Thu, 30 Apr 2009 23:00:00 +0100 2703073 http://www.medworm.com/index.php?rid=2703072&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%3D19675931%26dopt%3DAbstract Authors: Passamani M, Ribeiro D Between May 2002 and May 2003, we studied a small mammal community from an Atlantic forest fragment surrounded by a coffee plantation in the municipality of Santa Teresa, Espírito Santo state, Brazil. We obtained a total of 300 captures of 114 individuals belonging to 11 mammal species. Seventy three percent of the species captured in the forest also used the coffee plantation, mainly males (90%) and young (80%) individuals of Marmosops incanus. The exceptionally low recapture rate in the coffee plantation suggests that it functions as a corridor between fragments, rather than as a habitat for these species. Understanding the role of matrix habitat use in fragmented landscapes is an important factor in small mammal conservation, as it asymmetrically... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703072 Thu, 30 Apr 2009 23:00:00 +0100 2703072 http://www.medworm.com/index.php?rid=2703071&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%3D19675932%26dopt%3DAbstract This study aimed to compare the body size of the common opossum, Didelphis aurita, from different insular populations within the same archipelago in southern Brazil. The opossum populations showed corporal variation and different hypotheses were raised to understand the results. This study constitutes the most detailed body size comparison of a marsupial within different insular populations in the Neotropical zone and the data gathered represents an initial contribution for regional fauna biometric knowledge. PMID: 19675932 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703071 Thu, 30 Apr 2009 23:00:00 +0100 2703071 http://www.medworm.com/index.php?rid=2703070&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%3D19675933%26dopt%3DAbstract Authors: Duncan WP, Marcon JL The metabolic profiles of selected tissues were analyzed in hatchlings of the Amazonian freshwater turtles Podocnemis expansa, P. unifilis and P. sextuberculata. Metabolic design in these species was judged based on the key enzymes of energy metabolism, with special emphasis on carbohydrate, lipid, amino acid and ketone body metabolism. All species showed a high glycolytic potential in all sampled tissues. Based on low levels of hexokinase, glycogen may be an important fuel for these species. The high lactate dehydrogenase activity in the liver may play a significant role in carbohydrate catabolism, possibly during diving. Oxidative metabolism in P. sextuberculata appears to be designed for the use of lipids, amino acids and ketone bodies. The maximal acti... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703070 Thu, 30 Apr 2009 23:00:00 +0100 2703070 http://www.medworm.com/index.php?rid=2703069&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%3D19675934%26dopt%3DAbstract Authors: Lopes KA, Campos Velho NM, Munin E The mechanism of regeneration does not start to restore the wound until its corresponding epimorphic phase. A bioestimulation of tissues and cells by laser radiation depends on the wavelength, on the dose, and on the intensity of the light. The goal of this work was to verify the effect of the low power laser at 660 nm on the regenerative process of Girardia tigrina. The specimens were maintained in the laboratory under a temperature ranging from 19 degrees up to 24 degrees C for 21 days. The planarians were anesthetized by placing them on ice and then cut them with a scalpel. The three treatments were as following: animals individually irradiated with 14 sessions with 1 minute duration (treatment 1), 14 sessions with 3 minutes duration (trea... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703069 Thu, 30 Apr 2009 23:00:00 +0100 2703069 http://www.medworm.com/index.php?rid=2703068&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%3D19675935%26dopt%3DAbstract In this study, we describe cutaneous lesions observed in Mugil platanus specimens and tested their correlation with environmental ammonia concentration. PMID: 19675935 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703068 Thu, 30 Apr 2009 23:00:00 +0100 2703068 http://www.medworm.com/index.php?rid=2703067&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%3D19675936%26dopt%3DAbstract Authors: Mossi AJ, Mazutti M, Paroul N, Corazza ML, Dariva C, Cansian RL, Oliveira JV Maytenus ilicifolia and Maytenus aquifolia species are widely used as a cicatrisation agent, an anti-spasmodic, contraceptive, antiulcerogenic, diuretic and analgesic. Considering the importance of these species in popular medicine, this work is focused on the determination of the chemical content of tannins and the triterpenes friedelan-3-one, friedelan-3-ol and friedelin in 15 native populations of Maytenus ilicifolia distributed in the south and mind-west regions of Brazil. Correlation of the concentration of these compounds with the environmental parameters such as average annual temperature, climate, vegetation, geomorphology, latitude and altitude was determined using Pearson's coefficient. Resu... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703067 Thu, 30 Apr 2009 23:00:00 +0100 2703067 http://www.medworm.com/index.php?rid=2703066&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%3D19675937%26dopt%3DAbstract Authors: Squarcia SM, Sidorkewicj NS, Camina R, Casanave EB The aim of this study was to study the sexual dimorphism in adult Chaetophractus villosus (Desmarest, 1804), from northern Patagonia, Argentina. Eight mandibular traits were measured in 37 males and 34 females. Univariate and multivariate morphometric analysis were applied to the data set. Results showed that C. villosus was sexually dimorphic, with higher absolute values corresponding to females. The total length of the mandible was the most important variable to discriminate sexes, followed by the height at the level of the last tooth and body length. The percentages of sex discrimination were high, as they were when a new sample (17 males, 13 females) was tested. Females have larger mandibles than males independently of the... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703066 Thu, 30 Apr 2009 23:00:00 +0100 2703066 http://www.medworm.com/index.php?rid=2703065&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%3D19675938%26dopt%3DAbstract Authors: Paroul N, Cansian RL, Rossato M, Pauletti GF, Serafini LA, Rota L, Moyna P, Heinzen H The wax hydrocarbon fractions of native Butia and Syagrus species collected from Palms in different regions of the of Rio Grande do Sul state (Brazil) and in Rocha (Uruguay) were analyzed to evaluate their potential as chemotaxonomic markers. The wax was extracted with chloroform and the resulting wax was fractionated by preparative TLC. The hydrocarbon fractions were analyzed by GC-MS. Statistical analyses were completed with the Statistica 5.0 program. The total crude wax yields averaged 0.31% w.w-1 dried leaves for Butia samples and 0.28% for Syagrus samples. The linear hydrocarbons represented on average 15% of the total waxes in the case of Butia samples and 13.7% in Syagrus samples. Hen... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703065 Thu, 30 Apr 2009 23:00:00 +0100 2703065 http://www.medworm.com/index.php?rid=2703064&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%3D19675939%26dopt%3DAbstract This study aimed to identify parasitoid species of frugivorous larvae and to describe the tritrophic interactions involving wild fruits, frugivorous insects and their natural enemies at Adolpho Ducke Forest Reserve (RFAD) (Manaus, AM, Brazil). Collections were performed in four 1 km2 quadrants in the corners of the RFAD. The wild fruits were collected inside the forest in access trails leading to each collection area and in trails that surrounded the quadrants, up to five metres from the trail on each side. The fruits were placed in plastic containers covered with thin fabric, with a vermiculite layer on the base to allow the emergence of flies or parasitoids. Seven Braconidae species were collected, distributed among Opiinae: Doryctobracon areolatus (Szépligeti, 1911), Utetes anastre... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703064 Thu, 30 Apr 2009 23:00:00 +0100 2703064 http://www.medworm.com/index.php?rid=2703063&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%3D19675940%26dopt%3DAbstract Authors: Melis MS, Rocha ST, Augusto A Stevia rebaudiana, a South American plant normally used as a natural herbal sweetener, has been suggested as exerting beneficial effects on human health, including as an antihypertensive and antihyperglycemic. The present experiment was undertaken to evaluate the renal excretion of steviol, the aglycone of several natural products extracted from the leaves of S. rebaudiana, and to clarify the actual participation of this compound on the renal excretion of glucose in rats, which has been previously suggested as the preferential action of steviol on the Na+-glucose renal tubular transport system. Steviol was obtained by enzymatic hydrolysis of stevioside with pectinase. Thirty normal male Wistar rats weighing 345 g were used. After a control period,... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703063 Thu, 30 Apr 2009 23:00:00 +0100 2703063 http://www.medworm.com/index.php?rid=2703062&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%3D19675941%26dopt%3DAbstract Authors: Manica-Cattani MF, Zacaria J, Pauletti G, Atti-Serafini L, Echeverrigaray S Twenty-seven accessions of Lippia alba Mill. collected in Rio Grande do Sul state, Brazil, were analysed by ISSR and RAPD markers to evaluate their genetic variability and relationships. Six ISSR primers and four RAPD primers generated 120 amplified fragments, most of which were polymorphics. The overall genetic variability among accessions was very high when compared with other plant species. The hierarchical analysis of molecular data (UPGMA) showed low relationship between accessions, and no grouping between accessions of the same chemotype. Canonical functions allowed identifying some variables related with the chemical characteristics of the essential oils. Both ISSR and RAPD markers were efficien... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703062 Thu, 30 Apr 2009 23:00:00 +0100 2703062 http://www.medworm.com/index.php?rid=2703061&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%3D19675942%26dopt%3DAbstract Daily feeding activity of Bryconamericus microcephalus (Characiformes, Characidae) from Córrego Andorinha, Ilha Grande - RJ. Braz J Biol. 2009 May;69(2):381-4 Authors: Mazzoni R, Rezende CF The present study was conducted at the Córrego Andorinha on the eastern slope of Ilha Grande and aimed to determine the alimentary daily rhythm of Bryconamericus microcephalus. Fishes were sampled at a 4 hours interval over a 24 hours period during winter 2002 and summer 2003. Gut fullness was determined according to a numerical scale ranging from 0 (empty gut) to 3 (full gut). No differences were registered for the daily ration estimates between seasons. It is concluded that B. microcephalus is a diurnal feeding species, as the high values of gut fullness occurred between 11:00 AM... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703061 Thu, 30 Apr 2009 23:00:00 +0100 2703061 http://www.medworm.com/index.php?rid=2703060&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%3D19675943%26dopt%3DAbstract In this study, the gill tissue from armored catfish (Pterygoplichthys anisitsi) was quantified in each step of processing using the stereological principles. During processing for glycol methacrylate embedding, gill tissue from shrinks significantly but regains its original dimensions after sectioning. PMID: 19675943 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703060 Thu, 30 Apr 2009 23:00:00 +0100 2703060 http://www.medworm.com/index.php?rid=2703059&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%3D19675944%26dopt%3DAbstract Authors: Freyre LR, Colautti DC, Maroñas ME, Sendra ED, Remes-Lenicov M The study object was an Odontesthes bonariensis (Valenciennes, 1835) population of a characteristically shallow lake from the pampasic region. Over one year, zooplankton and fish samples were collected monthly. As a function of time and gender, several indices were investigated (relative weight, mesentery fat index, gonadosomatic index, hepatosomatic index and somatic index) and were related to zooplanktonic community dynamics, the main energy food source for this species. The results indicate that the seasonal information contained in the weight compartments is most important in mesentery fat, gonads and liver. The zooplankton availability modulates reserves (fat) behaviour and physiologic activity (liver), d... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703059 Thu, 30 Apr 2009 23:00:00 +0100 2703059 http://www.medworm.com/index.php?rid=2703058&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%3D19675945%26dopt%3DAbstract In conclusion, the group subjected to the association of EMF and undernutrition suffered a decrease in its serum concentration of T4 and T3 when compared to the well-nourished group and the relationship T4:T3 in the former group was almost eighteen-fold the later one. PMID: 19675945 [PubMed - in process] (Source: Braz J Biol) Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703058 Thu, 30 Apr 2009 23:00:00 +0100 2703058 http://www.medworm.com/index.php?rid=2703057&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%3D19675946%26dopt%3DAbstract The ovary of the bignose fanskate Sympterygia acuta Garman, 1877 (Chondrichthyes, Rajidae) in the Bahía Blanca estuary, Argentina: morphology and reproductive features. Braz J Biol. 2009 May;69(2):405-13 Authors: Díaz-Andrade MC, Galíndez E, Estecondo S Chondrichthyes have become an important economic resource in recent years. In spite of this importance, there is little knowledge about their reproductive biology, especially of species from the south-western Atlantic. In this work, we study the morphology and histology of the ovary of Sympterygia acuta. The results show that oogonia were present only in the immature females (stage I of maturity scale), whereas specimens in stages II and III of maturity displayed oocytes in all developmental steps. The most import... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703057 Thu, 30 Apr 2009 23:00:00 +0100 2703057 http://www.medworm.com/index.php?rid=2703056&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%3D19675947%26dopt%3DAbstract Authors: Abreu JS, Takahashi LS, Hoshiba MA, Urbinati EC The effects of capture (chasing, netting and air exposure) on cortisol, glucose, chloride, sodium, potassium and calcium concentrations, osmolality, hematocrit, hemoglobin concentration, red blood cells count (RBC) and mean corpuscular volume (MCV) were investigated in pacu (Piaractus mesopotamicus). A total of 132 fish (49.7 +/- 11.7 g) were subjected to capture and 3 minutes air exposure and capture and 5 minutes air exposure. Nine fish at each treatment were sampled at 5, 15, 30, 60 minutes and 24 hours after the procedure. Nine undisturbed fish were sacrificed before the handling and used as controls. Capture resulted in a rise in blood cortisol and glucose 30 and 5 minutes, respectively, after both air exposures. Both indica... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703056 Thu, 30 Apr 2009 23:00:00 +0100 2703056 http://www.medworm.com/index.php?rid=2703055&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%3D19675948%26dopt%3DAbstract Helminthological records of six-banded armadillos Euphractus sexcinctus (Linnaeus, 1758) from the Brazilian semi-arid region, Patos county, Paraíba state, including new morphological data on Trichohelix tuberculata (Parona and Stossich, 1901) Ortlepp, 1922 and proposal of Hadrostrongylus ransomi nov. comb. Braz J Biol. 2009 May;69(2):423-8 Authors: Hoppe EG, Araújo de Lima RC, Tebaldi JH, Athayde AC, Nascimento AA This work aimed to evaluate the gastrointestinal helminthfauna composition of six-banded armadillos from the Brazilian semi-arid region. Gastrointestinal contents of six road-killed adult animals from Patos County, Paraíba State, were analyzed. Six species of nematodes, comprising five genera and four families, were recovered from the analyzed animals. ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703055 Thu, 30 Apr 2009 23:00:00 +0100 2703055 http://www.medworm.com/index.php?rid=2703054&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%3D19675949%26dopt%3DAbstract Authors: Ferreira A, Silva DN, Van Sluys M, Dolder H The reproductive cycles of lizards, including Tropidurus species, have been widely studied. However, few studies describe in detail the ultrastructure and the epithelial changes in the epididymis. Using histology and trasmission electron microscopy, we show the seasonal changes in the testis and epididymis of the lizard Tropidurus itambere, during its annual reproductive cycle. The reproductive cycle of T. itambere was analysed from June 1988 to June 1989 and from June 2001 to June 2002. While the frequency of reproductive males in the population varied throughout the year, there were reproductive males in most months except for February through April. During this nonreproductive period, there is a reduction in the mean seminiferous ... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703054 Thu, 30 Apr 2009 23:00:00 +0100 2703054 http://www.medworm.com/index.php?rid=2703053&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%3D19675950%26dopt%3DAbstract Authors: Salibian A, Montalti D This review discusses different aspects of the uropygial gland of birds. The gland exhibits a striking morphological diversity in size, shape and presence/absence of tufts of feathers. It was shown that acidic mucins, neutral lipids, glycolipids and phospholipids are normal components of secretion. Several morphological and physiological aspects of the gland were studied on Rock Pigeon Columba livia Gmelin, 1879. The amount of the uropygial gland secretion, its lipid content and fatty acids profile were determined. The extracted lipid mixture contained of C14 to C20 fatty acids, mostly unsaturated; the saturated fatty acids were mainly 14:0, 16:0 and 18:0. No correlation was found between the size of the gland and the aquatic/terrestrial nature of the sp... Braz J Biol journals http://www.medworm.com/rss/comments.php?id=2703053 Thu, 30 Apr 2009 23:00:00 +0100 2703053