Results 71 to 80 of about 559 (179)

Morfologia do ovário e útero das arraias de água doce da família Potamotrygonidae (Chondrichthyes: Elasmobranchii) da Bacia do Rio Negro, Médio Rio Negro [PDF]

, 2013
As arraias da família Potamotrygonidae são importantes recursos na economia de pescadores ribeirinhos do Estado do Amazonas. Apesar da sua importância, pouco se conhece a respeito da sua biologia reprodutiva. Neste trabalho, será estudada a morfologia de
Maria Isabel da Silva
core   +1 more source

Hábitos alimentares e sobreposição trófica das raias Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) na planície alagável do alto rio Paraná, Brasil = Feeding habitats and trophic overlap of the freshwater stingrays Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) in the upper Paraná river floodplain, Brazil

Acta Scientiarum: Biological Sciences, 2006
As raias Potamotrygon falkneri e Potamotrygon motoro foram avaliadas em relação à composição de suas dietas e a sobreposição do nicho trófico nos períodos de seca (agosto/2004) e cheia (janeiro/2005) na planície alagável do alto rio Paraná, em três ...
Milza Celi Fedatto Abelha, Alessandra Pasian Lonardoni, Erivelto Goulart, Edson Fontes de Oliveira   +3 more
doaj  

Injuries caused by freshwater stingrays in the Tapajós River Basin: a clinical and sociodemographic study

Revista da Sociedade Brasileira de Medicina Tropical
INTRODUCTION Freshwater stingray envenomations are an important cause of morbidity in riverine populations living in various regions of Brazil. The sequelae include temporary or permanent disability.
Paulo Afonso Martins Abati, Pasesa Pascuala Quispe Torrez, Francisco Oscar de Siqueira França, Fabio Lambertini Tozzi, Flávio Mileo Bacelar Guerreiro, Suellen Aline Torres dos Santos, Sheyla Mara Silva de Oliveira, Vidal Haddad Junior   +7 more
doaj   +1 more source

BIOECOLOGÃ�A DE LA RAYA DE AGUA DULCE Potamotrygon magdalenae (Duméril, 1865) (MYLIOBATIFORMES) EN LA CIÉNAGA DE SABAYO, GUAIMARAL, COLOMBIA BIOECOLOGY OF THE FRESHWATER STINGRAY Potamotrygon magdalenae (Duméril, 1865) (MYLIOBATIFORMES) FROM THE CIÉNAGA DE SABAYO, GUAIMARAL, COLOMBIA

Revista U.D.C.A Actualidad & Divulgación Científica, 2011
A pesar de la representatividad de Potamotrygon magdalenae en Colombia, por encontrarse a lo largo de la cuenca del río Magdalena y sus afluentes, esta raya no ha sido objeto de estudios previos, desconociéndose la mayor parte de sus aspectos bio ...
Herly Bibiana Ramos-Socha, Marcela Grijalba-Bendeck   +1 more
doaj  

A Severe Accident Caused by an Ocellate River Stingray (Potamotrygon motoro) in Central Brazil: How Well Do We Really Understand Stingray Venom Chemistry, Envenomation, and Therapeutics?

Toxins, 2015
Freshwater stingrays cause many serious human injuries, but identification of the offending species is uncommon. The present case involved a large freshwater stingray, Potamotrygon motoro (Chondrichthyes: Potamotrygonidae), in the Araguaia River in ...
Nelson Jorge da Silva, Kalley Ricardo Clementino Ferreira, Raimundo Nonato Leite Pinto, Steven Douglas Aird   +3 more
doaj   +1 more source

Molecular systematics of the freshwater stingrays (Myliobatiformes: potamotrygonidae) of the Amazon, Orinoco, Magdalena, Esequibo, Caribe and Maracaibo basins (Colombia-Venezuela): Evidence from mitochondrial genes

, 2012
Freshwater stingrays from the family Potamotrygonidae have a restricted distribution to the freshwater systems of South America. Lack of adequate information about the taxonomic and evolutionary relationships, ecology, biology and distribution of several
García Villamil, David Alejandro
core   +2 more sources

Molecular characterization of Potamotrygon species (Potamotrygonidae, Myliobatiformes) from the Upper Paraná River floodplain, Brazil : variability and genetic differentiation, hybridization and phylogeography.

, 2010
The freshwater stingrays from the Potamotrygonidae family are cartilaginous fish of marine origins that invaded the Amazon basin during the Miocene. There are other freshwater species, such as from the Dasyatidae family, but only the stingrays of the ...
Maniglia, Thiago Cintra
core   +1 more source

Feeding behavior of the Neotropical freshwater stingray Potamotrygon motoro (Elasmobranchii: Potamotrygonidae)

Neotropical Ichthyology
The feeding mechanisms of elasmobranchs and their functioning have been receiving growing scientific attention, although less emphasis has yet to be directed towards batoid species.
Akemi Shibuya, Jansen Zuanon, Sho Tanaka
doaj   +1 more source

TAXONOMIC REVISION OF RHINEBOTHROIDES (EUCESTODA: TETRAPHYLLIDEA: PHYLLOBOTHRIIDAE), PARASITES OF NEOTROPICAL FRESHWATER STINGRAYS (RAJIFORMES: MYLIOBATOIDEI: POTAMOTRYGONIDAE)

Journal of Parasitology, 2003
Extensive new collections of specimens of Rhinebothroides spp. from a wide range of Neotropical freshwater potamotrygonid stingrays in numerous localities permitted critical evaluation of the validity of the 7 nominal species in the genus. Some qualitative characters previously used in the taxonomy of this group are highly variable within and among ...
Marques, Fernando P.L., Brooks, Daniel R.   +1 more
openaire   +3 more sources

Activity and habitat use of two species of stingrays (Myliobatiformes: Potamotrygonidae) in the upper Paraná River basin, Southeastern Brazil

Neotropical Ichthyology
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 ...
Domingos Garrone Neto, Virgínia Sanches Uieda   +1 more
doaj   +1 more source