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	Provedor de dados Zoologia (1) BABT (1) Genet. Mol. Biol. (1) Neotropical Ichthyology (1) Autor Charvet-Almeida,Patricia (4) Araújo,Maria Lúcia Góes de (2) Eiras-Stofella,Daura Regina (2) Almeida,Maurício Pinto de (1) Alves-Gomes,José A. (1) Farias,Izeni P. (1) Farias,Izeni Pires (1) Frederico,Renata G. (1) Hrbek,Tomas (1) Toffoli,Daniel (1) Mais... Palavra-chave COI (2) Scanning (2) ATPase (1) Amazon basin (1) Barcoding (1) Eugerres brasilianus (1) Freshwater fish (1) Gill (1) Gill morphology (1) Morphology (1) MtDNA (1) Phylogenetics (1) Population genetics (1) Potamotrygon (1) Prochilodus scrofa (1) Radiation (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2012 (1) 2008 (1) 2000 (1) 1998 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última A test of the utility of DNA barcoding in the radiation of the freshwater stingray genus Potamotrygon (Potamotrygonidae, Myliobatiformes) Genet. Mol. Biol. Toffoli,Daniel; Hrbek,Tomas; Araújo,Maria Lúcia Góes de; Almeida,Maurício Pinto de; Charvet-Almeida,Patricia; Farias,Izeni Pires. DNA barcoding is a recently proposed global standard in taxonomy based on DNA sequences. The two main goals of DNA barcoding methodology are assignment of specimens to a species and discovery of new species. There are two main underlying assumptions: i) reciprocal monophyly of species, and ii) intraspecific divergence is always less than interspecific divergence. Here we present a phylogenetic analysis of the family Potamotrygonidae based on mitochondrial cytochrome c oxidase I gene, sampling 10 out of the 18 to 20 valid species including two non-described species. Potamotrygonidae systematics is still not fully resolved with several still-to-be-described species while some other species are difficult to delimit due to overlap in morphological characters... Tipo: Info:eu-repo/semantics/article Palavras-chave: Potamotrygon; Barcoding; Radiation; Phylogenetics; COI; MtDNA. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200028 Gills scanning images of the seawater fish Eugerres brasilianus (Gerreidae) BABT Eiras-Stofella,Daura Regina; Charvet-Almeida,Patricia. The gills of the adult fish, Eugerres brasilianus (Gerreidae) were analyzed in a scanning electron microscope. The stratified epithelium was uniform on all parts of the branchial arch. Concentric microridges were present on cells that form this epithelium and were mainly observed in the primary lamellae and pharyngeal region where mucous cells were also abundant. The ultrastructural features of E. brasilianus gills indicated that this was not a filtering species, and that the feeding habit included mainly the intake of small organisms. The results presently obtained agreed with other literature data which determined the feeding habit of this species by means of stomach content analysis and other aspects. Tipo: Info:eu-repo/semantics/article Palavras-chave: Gill; Morphology; Scanning; Eugerres brasilianus. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400011 Phylogeography and conservation genetics of the Amazonian freshwater stingray Paratrygon aiereba Müller & Henle, 1841 (Chondrichthyes: Potamotrygonidae) Neotropical Ichthyology Frederico,Renata G.; Farias,Izeni P.; Araújo,Maria Lúcia Góes de; Charvet-Almeida,Patricia; Alves-Gomes,José A.. The family Potamotrygonidae is monophyletic comprising three genera: Paratrygon Duméril, Potamotrygon Garman and Plesiotrygon Rosa, Castello & Thorson. The distribution of most species in this family is restricted to a single basin or fluvial system. Only Potamotrygon motoro, Potamotrygon orbignyi and Paratrygon aiereba are found in more than one river basin. In this study we investigate genetic structuring of Paratrygon aiereba, from five rivers of the Amazon region: Negro, Solimões-Amazon-Estuary system, Tapajós, Xingu and Araguaia. Sixty-three individuals were sequenced for ATPase 6, and a representative subsample of 27 individuals was sequenced for COI. The COI dataset analysis indicated that Paratrygon is sister to all other potamotrygonid... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; ATPase; COI; Population genetics. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100007 Ultrastructure (SEM) of the gills of Prochilodus Scrofa Steindachner (Pisces, Teleostei) Zoologia Eiras-Stofella,Daura Regina; Charvet-Almeida,Patricia. Gills arches of the freshwater fish Prochilodus scrofa Steindachner, 1881 (Lt= 8.0-12.4cm) were removed to be analyzed in a scanning electron microscope. The morphology of the superficial structures of the gill filaments and pharyngeal region of the gills arches was discussed and related to their functional aspects. A great quantity of mucous secretory cells and of microridges, along with the pavement cell surface of the primary lamellae and branchial pharyngeal region, indicate the existence of a protection strategy of the respiratory lamellae. The chloride cells are abundant, specially on the distal portion of the primary lamellae, and bring out the osmo regulatory capacity of this species. This fish seems not to be a filtering one according to: its... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gill morphology; Scanning; Freshwater fish; Prochilodus scrofa. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000200001 Registros recuperados: 4 Primeira ... 1 ... Última

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