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	Provedor de dados Neotropical Ichthyology (4) Autor Lucena,Carlos A. S. de (2) Bertaco,Vinicius A (1) Bertaco,Vinicius A. (1) Cardoso,Alexandre R. (1) Castro,Jonas Blanco (1) Fialho,Clarice B. (1) Giora,Júlia (1) Schaan,Andrea B. (1) Mais... Palavra-chave Laguna dos Patos system (4) Taxonomy (3) Neotropical fish (2) Rio Grande do Sul (2) Abiotic factors (1) Astyanax scabripinnis species complex (1) Bunocephalinae (1) Gymnotiformes (1) Parque Estadual de Itapuã (1) Reproduction (1) Rio Uruguay (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2013 (1) 2010 (2) 2009 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Bunocephalus erondinae, a new species of banjo catfish from southern Brazil (Siluriformes: Aspredinidae) Neotropical Ichthyology Cardoso,Alexandre R.. Bunocephalus erondinae, a new species of banjo catfish is described from the laguna dos Patos system, Rio Grande do Sul, Brazil. The new species differs from its congeners by the bony epiphyseal bar very wide (vs. narrow). Bunocephalus erondinae is externally most similar to Bunocephalus doriae (rio Uruguay and rio Paraná-Paraguay basins), however, differs from this species by the following characters: the bony epiphyseal bar very wide (vs. narrow); metapterygoid round, width is equal the height (vs. metapterygoid elongate, width lesser than half of height), well developed lamina in the hypohyal and anterior ceratohyal bones (vs. little developed or absent), 32 vertebrae (vs. 34-35), first procurrent caudal-fin rays well developed (vs. vestigial),... Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxonomy; Bunocephalinae; Laguna dos Patos system; Rio Grande do Sul. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000300005 Three new species of Astyanax from drainages of southern Brazil (Characiformes: Characidae) Neotropical Ichthyology Lucena,Carlos A. S. de; Castro,Jonas Blanco; Bertaco,Vinicius A.. Three new species of Astyanax are described from southern Brazil: A. dissensus and A. xiru from the laguna dos Patos system and rio Uruguay basin, the first species also occurring in the rio Tramandaí system, and A. procerus from the laguna dos Patos system. Astyanax procerus and A. xiru possess outer row premaxillary teeth pentacuspid and inner row heptacuspid, maxillary with one tri- to pentacuspid teeth, 18-23 branched anal-fin rays, and two humeral spots. Astyanax procerus has the largest body depth (38.3-46.0% of SL), while A. xiru has the lowest body depth (32.5-37.5% of SL) among the three species. The characters combination can distinguish these species from its congeners. Astyanax dissensus distinguish from Astyanax species by the presence of one... Tipo: Info:eu-repo/semantics/article Palavras-chave: Laguna dos Patos system; Neotropical fish; Rio Grande do Sul; Rio Uruguay; Taxonomy. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300537 Reproductive biology of the Neotropical electric fish Brachyhypopomus draco (Teleostei: Hypopomidae) from southern Brazil Neotropical Ichthyology Schaan,Andrea B.; Giora,Júlia; Fialho,Clarice B.. The reproductive biology of a population of the weakly electric fish Brachyhypopomus draco from southern Brazil is described. Information is provided on the establishment of the reproductive period in this species and its relations with environmental and feeding factors, as well as on the absolute and relative fecundities, spawning type, sex ratio and sexual dimorphism. The species exhibits a relatively long reproductive period, a relative fecundity of 0.173 oocytes per mg of female total weight, and fractional spawning. The sex ratio did not differ from 1:1 during all sampled months. Sexual dimorphism related to hypertrophy of the male's distal portion of caudal filament was observed and males grew to greater lengths than females. Male gonadosomatic index... Tipo: Info:eu-repo/semantics/article Palavras-chave: Reproduction; Gymnotiformes; Abiotic factors; Laguna dos Patos system; Parque Estadual de Itapuã. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400023 Redescription of Astyanax obscurus (Hensel, 1870) and A. laticeps (Cope, 1894) (Teleostei: Characidae): two valid freshwater species originally described from rivers of Southern Brazil Neotropical Ichthyology Bertaco,Vinicius A; Lucena,Carlos A. S. de. Astyanax obscurus and A. laticeps are redescribed. Both species were originally described from the laguna dos Patos system, Rio Grande do Sul, Brazil. The deepest and most robust body area close to the middle of the pectoral fins length, robust head, snout short and abrupt, body depth smaller than 41% of SL, reduced number of branched anal-fin rays, presence of one or two humeral spots, and a dark midlateral body stripe extending to the tip of the middle caudal-fin rays include both in the A. scabripinnis species complex. The presence of two humeral spots (vs. one), external row of the premaxillary with pentacuspid teeth (vs. tricuspid), and absence of bony hooks in all fins in males (vs. presence in anal and ventral fins) distinguish A. obscurus from A.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical fish; Taxonomy; Astyanax scabripinnis species complex; Laguna dos Patos system. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000100002 Registros recuperados: 4 Primeira ... 1 ... 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