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Ribeira do Pombal, Brazil

Petry A.C.,University Federal Do Rio Of Janeiroufrj | Guimaraes T.F.R.,Federal University of Rio Grande do Sul | Vasconcellos F.M.,University Federal Do Rio Of Janeiroufrj | Hartz S.M.,Federal University of Rio Grande do Sul | And 15 more authors.
Journal of Fish Biology | Year: 2016

The relationships between fish composition, connectivity and morphometry of 103 lagoons in nine freshwater ecoregions (FEOW) between 2·83° S and 37·64° S were evaluated in order to detect possible congruence between the gradient of species richness and similarities of assemblage composition. Most lagoons included in the study were <2 km2, with a maximum of 3975 km2 in surface area. Combined surface area of all lagoons included in the study was 5411 km2. Number of species varied locally from one to 76. A multiple regression revealed that latitude, attributes of morphometry and connectivity, and sampling effort explained a large amount of variability in species richness. Lagoon area was a good predictor of species richness except in low latitude ecoregions, where lagoons are typically small-sized and not affected by marine immigrants, and where non-native fish species accounted for a significant portion of species richness. Relationships between species and area in small-sized lagoons (<2 km2) is highly similar to the expected number in each ecoregion, with systems located between 18·27° S and 30·15° S attaining higher levels of species richness. Similarities in species composition within the primary, secondary and peripheral or marine divisions revealed strong continental biogeographic patterns only for species less tolerant or intolerant to salinity. Further support for the FEOW scheme in the eastern border of South America is therefore provided, and now includes ecotonal systems inhabited simultaneously by freshwater and marine species of fishes. © 2016 The Fisheries Society of the British Isles Source


Birindelli J.L.O.,State University Londrina | Sarmento-Soares L.M.,Instituto Nacional da Mata Atlantica | Sarmento-Soares L.M.,Federal University of Espirito Santo | Lima F.C.T.,University of Campinas
Journal of Fish Biology | Year: 2015

A new species of the catfish genus Centromochlus (Auchenipteridae, Centromochlinae) is described. The new species is diagnosed by having numerous dark rounded blotches over the body and fins, dorsal-fin spine with serrations anteriorly and smooth posteriorly, anal fin of mature males with three unbranched and seven branched rays, anterior nuchal plate absent and posterior nuchal plate not extended ventrally. The new species is described from a small stream in the Estação Ecológica Serra Geral de Tocantins, a natural reserve in the centre of the Brazilian Cerrado, close to the watershed between the Rio Tocantins and the Rio São Francisco basins. The new species is possibly the sister taxon to the recently described Centromochlus meridionalis from the upper Rio Tapajós. Those two species share with Centromochlus perugiae, from the upper Amazon and upper Paraguay, derived features associated with the modified anal fin in sexually mature males. © 2015 The Fisheries Society of the British Isles. Source


Sarmento-Soares L.M.,Instituto Nacional da Mata Atlantica | Sarmento-Soares L.M.,Federal University of Espirito Santo | Birindelli J.L.O.,State University Londrina
Neotropical Ichthyology | Year: 2015

Centromochlus comprises twelve species, distributed in the main inland watersheds of South America, including the Orinoco, Essequibo, coastal rivers of Suriname, Amazon, upper Paraná and São Francisco basins. The new species is described from the upper rio Paraná based on material collected in 1965 during the construction of the UHE Ilha Solteira, São Paulo, Brazil. The new species is easily distinguished from all congeners due to absence of adipose fin, a condition otherwise restricted to Gelanoglanis nanonocticolus, among centromochlin catfishes. The new species comprises small catfishes (adults ranging from 35 to 39 mm SL), in which modified anal fin of males is devoid of denticulations or spines, and most posterior rays reduced in length. In addition, Tatia simplex Mees is transferred to Centromochlus and its generic reassignment discussed. © 2015 Sociedade Brasileira de Ictiologia. Source


Gonzalez R.C.,Federal University of Rio de Janeiro | Silva-Soares T.,Federal University of Rio de Janeiro | Silva-Soares T.,Instituto Nacional da Mata Atlantica | Crozariol M.A.,Federal University of Rio de Janeiro | And 2 more authors.
Herpetology Notes | Year: 2016

Little is known about the feeding habits and prey items of many snake species, with very few works identifying vertebrate prey at the minor taxonomic level. Here are presented two new species of birds not previously recorded as preys of the tree boa (Corallus hortulanus) - the Gonden-Chevroned Tanager (Tangara ornata) and the Pale-Breasted Thrush (Turdus leucomelas), notwithstanding its decayed conditions, it was identified at the species level with the help of specialists and ornithological collections, demonstrating the need of more detailed studies on prey identification and collaboration with interdisciplinary researchers. © 2016, Societas Europaea Herpetologica. All rights reserved. Source


Zanata A.M.,Federal University of Bahia | Sarmento-Soares L.M.,Federal University of Espirito Santo | Martins-Pinheiro R.F.,Instituto Nacional da Mata Atlantica
Zootaxa | Year: 2015

Characidium helmeri, a species of the family Crenuchidae apparently endemic to rivers draining the extreme south of Ba-hia, Brazil, is described. The new species is easily distinguished from congeners by having dark, vertically elongated, ir-regular spots or dashes on flanks, usually more evident over midlateral stripe and/or ventral half of body, where it may present a somewhat curved or zigzag-shape. Characidium helmeri can be further distinguished from most congeners by having lateral line reduced to 13-22 pored scales, adipose fin absent, isthmus naked on its anteriormost portion, 14 scales around caudal peduncle, 4 scales above lateral line and 4 below, two series of dentary teeth, supraorbital absent or ex-tremely reduced, and basicaudal black spot well defined. The occurrence of reductive characters in Characidium is briefly discussed. Copyright © 2015 Magnolia Press. Source

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