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New record and description of the male of Choreborogas puteolus Achterberg, 1995 (Hymenoptera, Braconidae, Rogadinae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19802463 [PubMed - in process]
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Penteado-Dias AM, Ramiro ZA Tags: Braz J Biol Source Type: journals

Notes on the Brazilian Brachycyrtus Kriechbaumer species (Hymenoptera, Ichneumonidae Brachycyrtinae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19802462 [PubMed - in process]
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Onody HC, Loffredo AP, Penteado-Dias AM Tags: Braz J Biol Source Type: journals

Evaluation of sampling and analysis techniques for early detection of Limnoperna fortunei (Mytilidae) in limit areas of its distribution.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMID: 19802461 [PubMed - in process]
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Darrigran G, Boeger W, Damborenea C, Maroñas M Tags: Braz J Biol Source Type: journals

Physiological and physico-chemical characterization of dietary fibre from the green seaweed Ulva fasciata Delile.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Carvalho AF, Portela MC, Sousa MB, Martins FS, Rocha FC, Farias DF, Feitosa JP Tags: Braz J Biol Source Type: journals

Lung infection rates in two sympatric Tropiduridae lizard species by pentastomids and nematodes in northeastern Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Almeida WO, Ribeiro SC, Santana GG, Vieira WL, Anjos LA, Sales DL Tags: Braz J Biol Source Type: journals

Characterization of the acute inflammatory response in the hybrid tambacu (Piaractus mesopotamicus male x Colossoma macropomum female) (Osteichthyes).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 - August 1, 2009 Category: Biology Authors: Martins ML, Myiazaki DM, Tavares-Dias M, Fenerick J, Onaka EM, Bozzo FR, Fujimoto RY, Moraes FR Tags: Braz J Biol Source Type: journals

Graphomya Robineau-Desvoidy from Costa Rica: descriptions and first records (Diptera, Muscidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 diagn...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Couri MS, Marques B Tags: Braz J Biol Source Type: journals

Population fluctuation and faunal indices of aphids (Hemiptera, Aphididae) in peach orchards in Araucária, PR.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 pea...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Schuber JM, Monteiro LB, Poltronieri AS, Carvalho RC, Zawadneak MA Tags: Braz J Biol Source Type: journals

Germination of Ocotea pulchella (Nees) Mez (Lauraceae) seeds in laboratory and natural restinga environment conditions.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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....
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Pires LA, Cardoso VJ, Joly CA, Rodrigues RR Tags: Braz J Biol Source Type: journals

Population biology of Trichomycterus sp. (Siluriformes, Trichomycteridae) in Passa Cinco stream, Corumbataí River sub-basin, São Paulo State, southeastern Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Rondineli GR, Carmassi AL, Braga FM Tags: Braz J Biol Source Type: journals

Analysis of the microstructure of Xenodontinae snake scales associated with different habitat occupation strategies.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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) an...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Rocha-Barbosa O, Moraes e Silva RB Tags: Braz J Biol Source Type: journals

Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 (...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Fettuccia DC, da Silva VM, Simões-Lopes PC Tags: Braz J Biol Source Type: journals

Flow cytometry as a tool in the evaluation of blood leukocyte function in Chelonia mydas (Linnaeus, 1758) (Testudines, Cheloniidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 sep...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Rossi S, Sá-Rocha VM, Kinoshita D, Genoy-Puerto A, Zwarg T, Werneck MR, Sá-Rocha LC, Matushima ER Tags: Braz J Biol Source Type: journals

Apedunculata discoidea gen. n., sp. n. (Monogenea: Dactylogyridae) parasitic on Prochilodus lineatus (Valenciennes, 1837) (Characiformes: Prochilodontidae) from southeastern Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 - August 1, 2009 Category: Biology Authors: Cuglianna AM, Cordeiro NS, Luque JL Tags: Braz J Biol Source Type: journals

Fructification phenology as an important tool in the recovery of iron mining areas in Minas Gerais, Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
'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 (Melasto...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Garcia LC, Barros FV, Lemos-Filho JP Tags: Braz J Biol Source Type: journals

Do climate variables and human density affect Achatina fulica (Bowditch) (Gastropoda: Pulmonata) shell length, total weight and condition factor?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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: temp...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Albuquerque FS, Peso-Aguiar MC, Assunção-Albuquerque MJ, Gálvez L Tags: Braz J Biol Source Type: journals

Jaguarundi (Puma yagouaroundi) (Geoffroy, 1803) (Carnivora, Felidae) food habits in a mosaic of Atlantic Rainforest and eucalypt plantations of southeastern Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 sm...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Tófoli CF, Rohe F, Setz EZ Tags: Braz J Biol Source Type: journals

Reproductive performance of Palmistichus elaeisis Delvare and LaSalle (Hymenoptera: Eulophidae) with previously refrigerated pupae of Bombyx mori L. (Lepidoptera: Bombycidae).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Pereira FF, Zanuncio JC, Serrão JE, Pastori PL, Ramalho FS Tags: Braz J Biol Source Type: journals

Nutritional deficiency in citrus with symptoms of citrus variegated chlorosis disease.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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, Ne...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Silva-Stenico ME, Pacheco FT, Pereira-Filho ER, Rodrigues JL, Souza AN, Etchegaray A, Gomes JE, Tsai SM Tags: Braz J Biol Source Type: journals

Fate of copper in intensive shrimp farms: bioaccumulation and deposition in pond sediments.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 p...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Lacerda LD, Santos JA, Lopes DV Tags: Braz J Biol Source Type: journals

Phylogenetic overdispersion of plant species in southern Brazilian savannas.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 distribut...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Silva IA, Batalha MA Tags: Braz J Biol Source Type: journals

Evaluation of the cytotoxic and genotoxic potential of water from the River Paraíba do Sul, in Brazil, with the Allium cepa L. test.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 si...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Barbério A, Barros L, Voltolini JC, Mello ML Tags: Braz J Biol Source Type: journals

Temporary fragmentation of a marginal lake and its effects on zooplankton community structure and organization.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 co...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Nadai R, Henry R Tags: Braz J Biol Source Type: journals

Fire effects on the population structure of Zanthoxylum rhoifolium Lam (Rutaceae) in a Brazilian savanna.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Silva IA, Valenti MW, Silva-Matos DM Tags: Braz J Biol Source Type: journals

Diet composition of Plagioscion squamosissimus (Heckel, 1840), a fish introduced into the Tietê River system.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 n...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Stefani PM, Rocha O Tags: Braz J Biol Source Type: journals

The snake community of Serra do Mendanha, in Rio de Janeiro State, southeastern Brazil: composition, abundance, richness and diversity in areas with different conservation degrees.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Pontes JA, Pontes RC, Rocha CF Tags: Braz J Biol Source Type: journals

Composition, diversity and short-term temporal fluctuations of zooplankton communities in fish culture ponds (Pindamonhangaba), SP.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 obse...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Negreiros NF, Rojas NE, Rocha O, Santos Wisniewski MJ Tags: Braz J Biol Source Type: journals

Geographic pattern of morphological variation of the coconut mite, Aceria guerreronis Keifer (Acari: Eriophyidae), using multivariate morphometry.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 po...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Navia D, Moraes GJ, Querino RB Tags: Braz J Biol Source Type: journals

Seed predation by rodents and safe sites for large-seeded trees in a fragment of the Brazilian Atlantic forest.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 basic...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Pinto SR, Santos AM, Tabarelli M Tags: Braz J Biol Source Type: journals

Diet and feeding activity of Acestrorhynchus lacustris (Lütken, 1875) (Characiformes, Acestrorhynchidae) in the water reservoir at Ribeirão Claro, SP.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 t...
Source: Braz J Biol - August 1, 2009 Category: Biology Authors: Silva AT, Goitein R Tags: Braz J Biol Source Type: journals

The declaration on sustainable floodplain management. Editorial note.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Authors: PMID: 19802433 [PubMed - in process]
Source: Braz J Biol - August 1, 2009 Category: Biology Tags: Braz J Biol Source Type: journals

On the possible extinction of bird species in the Upper Paraná River floodplain, Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 stud...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Mendonça L, Lopes E, Anjos L Tags: Braz J Biol Source Type: journals

Vascular flora of the Upper Paraná River floodplain.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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, Myrtace...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Souza M, Kawakita K, Slusarski S, Pereira G Tags: Braz J Biol Source Type: journals

Species richness and abundance of bats in fragments of the stational semidecidual forest, Upper Paraná River, southern Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 mont...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Ortêncio-Filho H, Reis N Tags: Braz J Biol Source Type: journals

Limnology in the Upper Paraná River floodplain: large-scale spatial and temporal patterns, and the influence of reservoirs.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 con...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Roberto M, Santana N, Thomaz S Tags: Braz J Biol Source Type: journals

Evaluation of the Upper Paraná River discharge controlled by reservoirs.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Souza Filho E Tags: Braz J Biol Source Type: journals

Diversity of parasites of fish from the Upper Paraná River floodplain, Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 belo...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Takemoto R, Pavanelli G, Lizama M, Lacerda A, Yamada F, Moreira L, Ceschini T, Bellay S Tags: Braz J Biol Source Type: journals

Genetic divergence between Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum (Siluriformes: Pimelodidae) in the Paraná River Basin.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 g...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Bignotto Ts, Prioli A, Prioli S, Maniglia T, Boni T, Lucio L, Gomes V, Prioli R, Oliveira A, Júlio-Junior H, Prioli L Tags: Braz J Biol Source Type: journals

Effects of the hydrological regime on the ichthyofauna of riverine environments of the Upper Paraná River floodplain.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Fernandes R, Agostinho A, Ferreira E, Pavanelli C, Suzuki H, Lima D, Gomes L Tags: Braz J Biol Source Type: journals

Biodiversity of non-marine ostracods (Crustacea, Ostracoda) in the alluvial valley of the upper Paraná River, Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Higuti J, Lansac-Tôha F, Velho L, Martens K Tags: Braz J Biol Source Type: journals

Inter-annual variations in the abundance of young-of-the-year of migratory fishes in the Upper Paraná River floodplain: relations with hydrographic attributes.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Suzuki H, Agostinho A, Bailly D, Gimenes M, Júlio-Junior H, Gomes L Tags: Braz J Biol Source Type: journals

Phytoplankton diversity in the Upper Paraná River floodplain during two years of drought (2000 and 2001).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Borges P, Train S Tags: Braz J Biol Source Type: journals

Environmental education in the Upper Paraná River floodplain, municipality of Porto Rico (Paraná State), Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 methodol...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Obara A, Suzuki H, Takemoto R, Tomanik A, Corredato-Periotto T, Silva-Dias M Tags: Braz J Biol Source Type: journals

Temporal and spatial patterns of aquatic macrophyte diversity in the Upper Paraná River floodplain.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 lif...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Thomaz S, Carvalho P, Padial A, Kobayashi J Tags: Braz J Biol Source Type: journals

Effects of hydrological regime and connectivity on the interannual variation in taxonomic similarity of periphytic algae.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 cla...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Algarte V, Siqueira N, Murakami E, Rodrigues L Tags: Braz J Biol Source Type: journals

Consequences of dam construction upstream of the Upper Paraná River floodplain (Brazil): a temporal analysis of the Chironomidae community over an eight-year period.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 larva...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Rosin G, Oliveira-Mangarotti D, Takeda A, Butakka C Tags: Braz J Biol Source Type: journals

Environmental changes and human work in the region of the Upper Paraná River floodplain: processes and interactions.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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, ...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Tomanik E, Paiola L, Martínez-Fernández J, Fernandes S Tags: Braz J Biol Source Type: journals

Trophic position of bottom-feeding fish in the Upper Paraná River floodplain.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Lopes C, Benedito E, Martinelli L Tags: Braz J Biol Source Type: journals

Eight years of monitoring aquatic Oligochaeta from the Baía and Ivinhema Rivers.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Behrend R, Fernandes S, Fujita D, Takeda A Tags: Braz J Biol Source Type: journals

Exotic species of zooplankton in the Upper Paraná River floodplain, Daphnia lumholtzi Sars, 1885 (Crustacea: Branchiopoda).Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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, Southwe...
Source: Braz J Biol - June 1, 2009 Category: Biology Authors: Simões N, Robertson B, Lansac-Tôha F, Takahashi E, Bonecker C, Velho L, Joko C Tags: Braz J Biol Source Type: journals