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	Provedor de dados Neotropical Ichthyology (2) Biota Neotropica (1) Genet. Mol. Biol. (1) Autor Garrone Neto,Domingos (2) Uieda,Virgínia Sanches (2) Almeida,Maurício Pinto de (1) Araújo,Maria Lúcia G. de (1) Araújo,Maria Lúcia Góes de (1) Charvet-Almeida,Patricia (1) Farias,Izeni Pires (1) Hrbek,Tomas (1) Shibuya,Akemi (1) Tanaka,Sho (1) Toffoli,Daniel (1) Zuanon,Jansen (1) Mais... Palavra-chave Potamotrygon (4) Feeding behavior (2) Barcoding (1) Bathymetric migration (1) COI (1) Catfishes as prey (1) Dial movements (1) Mechanosensory (1) MtDNA (1) Neuromast (1) Paratrygon (1) Phylogenetics (1) Potamotrygonidae (1) Radiation (1) Scientific diving (1) Spatial ecology (1) Trophic ecology (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Info:eu-repo/semantics/other (1) Ano 2012 (1) 2010 (1) 2009 (1) 2008 (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 Activity and habitat use of two species of stingrays (Myliobatiformes: Potamotrygonidae) in the upper Paraná River basin, Southeastern Brazil Neotropical Ichthyology Garrone Neto,Domingos; Uieda,Virgínia Sanches. The life history of freshwater stingrays (Potamotrygonidae) under natural conditions has been poorly documented. In this study, we investigated theperiod of activity and the habitat use of two species of the genus Potamotrygon in the upper Paraná River basin, Southeastern Brazil. Potamotrygon falkneri and P. motoro are similar to each other as far as the analyzed behavior is concerned. Individuals of both species segregate according to their size, and in function of the depth and period of the day. Younger individuals inhabit mostly sandy beaches and places that are no deeper than four meters throughout the whole day. Bigger stingrays realize bathymetric migrations, alternating their position between places deeper than eight meters during the day, and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bathymetric migration; Dial movements; Potamotrygon; Scientific diving; Spatial ecology. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100008 Ingestion of catfish by freshwater stingray: possible mistake or inexperience Biota Neotropica Garrone Neto,Domingos; Uieda,Virgínia Sanches. We report an individual of the freshwater stingray Potamotrygon falkneri caught with a decomposing catfish, Pimelodella gracilis, stuck in its oral cavity. The ingestion of catfishes by stingrays is possibly rendered difficult or hazardous due to the serrated spines on the dorsal and pectoral fins of this prey type. There are at least two possible explanations for the rotting catfish we found stuck in the mouth of a potamotrygonid ray: mistake or inexperience of the analyzed specimen. Both possibilities may be due to the fact that the ray was a young individual. Tipo: Info:eu-repo/semantics/other Palavras-chave: Potamotrygon; Catfishes as prey; Feeding behavior; Trophic ecology; Potamotrygonidae. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400029 Morphology of lateral line canals in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae) from Negro River, Brazilian Amazon Neotropical Ichthyology Shibuya,Akemi; Zuanon,Jansen; Araújo,Maria Lúcia G. de; Tanaka,Sho. The relationship between the distribution of the lateral line canals and their functionality has not been well examined in elasmobranchs, especially among Neotropical freshwater stingrays of the family Potamotrygonidae. The spatial distribution of the canals and their tubules and the quantification of the neuromasts were analyzed in preserved specimens of Potamotrygon motoro, P. orbignyi, Potamotrygon sp. "cururu", and Paratrygon aiereba from the middle Negro River, Amazonas, Brazil. The hyomandibular, infraorbital, posterior lateral line, mandibular, nasal and supraorbital canals were characterized and their pores and neuromasts quantified. The ventral canals are known to facilitate the accurate localization of prey items under the body, and our results... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding behavior; Mechanosensory; Neuromast; Paratrygon; Potamotrygon. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400017 Registros recuperados: 4 Primeira ... 1 ... Última

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