Results 11 to 20 of about 252,570 (105)

Cytogenetic and molecular characteristics of Potamotrygon motoro and Potamotrygon sp. (Chondrichthyes, Myliobatiformes, Potamotrygonidae) from the Amazon basin: Implications for the taxonomy of the genus

Genetics and Molecular Biology, 2021
The chromosomes of two freshwater stingrays, Potamotrygon motoro and Potamotrygon sp., from the Amazon River basin in Brazil were investigated using integrated molecular (cytochrome c oxidase subunit 1) and cytogenetic analyses.
V. D. da Cruz, M. Nobile, F. Paim, Aisni Mayumi Correia de Lima Adachi, Giovana da Silva Ribeiro, D. C. Ferreira, J. C. Pansonato-Alves, Patricia Charvet, C. Oliveira, F. Foresti   +9 more
semanticscholar   +3 more sources

Acidentes causados pela arraia fluvial Potamotrygon motoro em comunidades lacustres em Território do bioma Oriental da Amazônia [PDF]

, 2021
The injuries caused by freshwater stingrays are common among fishermen. The raya Potamotrygon motoro en the features a stinger with a sharp edge and serrated tips spread bilaterally, the stingers have toxins that promote vasoconstriction, causing ...
Jailma Araújo da Costa, A. I. Martins, L. M. Feitosa, Vidal Haddad, Ingredy Eylanne Monroe Carvalho, J. L. S. Nunes   +5 more
semanticscholar   +2 more sources

Allometric patterns in Potamotrygon motoro (Myliobatiformes: Potamotrygonidae): insights into sexual and ontogenetic variation

Neotropical Ichthyology
Potamotrygon is the most species-rich genus of Neotropical freshwater stingrays in the Potamotrygoninae, currently comprising 31 species primarily diagnosed by coloration patterns, dermal denticles, and body measurements. Although morphometric characters
Júlia Papalardo Azevedo, T. S. Loboda, Veronica Slobodian   +2 more
semanticscholar   +2 more sources

Pre-copulatory bite wounds as evidence of aggressive competition for mating in the neotropical freshwater stingray Potamotrygon motoro

Acta Amazonica, 2022
Reproductive aspects of Amazonian freshwater stingrays are still poorly studied, however, it is known that the copulatory behavior in some species is related to the hydrometric seasons (high and low water).
Akemi Shibuya, W. Duncan
semanticscholar   +1 more source

Not just shades of grey: life is full of colour for the ocellate freshwater river stingray (Potamotrygon motoro).

Journal of Experimental Biology, 2021
Previous studies have shown that marine stingrays have the anatomical and physiological basis for colour vision, with cone spectral sensitivities in the blue to green range of the visible spectrum.
V. Schluessel, I. P. Rick, Friederike Seifert, C. Baumann, Wayne I. L. Davies   +4 more
semanticscholar   +1 more source

DIVERSIDADE DE RAIAS DE ÁGUA DOCE (Chondrichthyes : Potamotrygonidae) NO ESTUÁRIO AMAZÔNICO

Arquivos de Ciências do Mar, 2008
Um levantamento sobre registros de ocorrência de raias de água doce (Potamotrygonidae) no estuário amazônico foi realizado utilizando-se dados  bibliográficos, informações de coleções científicas disponíveis on-line e amostragens de campo.
M. D. de Almeida, R. Barthem, Anderson da Silva Viana, Patricia Charvet Almeida   +3 more
semanticscholar   +1 more source

RELAÇÃO ENTRE AS POPULAÇÕES NATURAIS DE ARRAIAS DE ÁGUA DOCE (MYLIOBATIFORMES: POTAMOTRYGONIDAE) E PESCADORES NO BAIXO RIO JURUÁ, ESTADO DO AMAZONAS, BRASIL

, 2015
The aim of this study was characterize the stingrays negative fishing freshwater in the municipality of Jurua, Amazonas. They were interviewed 50 registered fishermen in Cologne Jurua Fishermen, Z21.
A. T. de Oliveira, Erisilva Cunha de Lima, Lucilene da Silva Paes, S. M. dos Santos, R. Araújo, Jackson Pantoja-Lima, P. Aride   +6 more
semanticscholar   +1 more source

Preliminary data on the feeding habits of the freshwater stingrays Potamotrygon falkneri and Potamotrygon motoro (Potamotrygonidae) from the Upper Paran\ue1 River basin, Brazil [PDF]

, 2007
As raias da família Potamotrygonidae representam um grupo singular da ictiofauna Neotropical. Apesar de serem antigos os relatos sobre o grupo, ainda são muitas as questões que permanecem sem resposta, sobretudo no que diz respeito à biologia das ...
Silva,Thiago Buosi, Silva, Thiago Buosi, Uieda,Virgínia Sanches, Uieda, Virginia Sanches [UNESP], Silva, Thiago Buosi [UNESP], Uieda, Virginia Sanches, Spence, Magnus,   +6 more
core   +1 more source

Diversidad genética de potamotrygon motoro en las cuencas del Onrinóco y Amazonas colombiano [PDF]

, 2017
61 p. Recurso ElectrónicoLa falta de claridad frente a la taxonomía de Potamotrygon motoro y la ausencia de estudios previos de su diversidad genética, hace a la especie vulnerable al ser la segunda especie de raya de agua dulce más extraída y exportada ...
Renza Millán, Mariana
core   +1 more source

The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) [PDF]

, 2015
Synchronized bipedal movements of the pelvic fins provide propulsion (punting) during displacement on the substrate in batoids with benthic locomotion. In skates (Rajidae) this mechanism is mainly generated by the crural cartilages.
Marcelo R. de Carvalho, Carvalho, Marcelo Rodrigues de, Tanaka, Sho, Sho Tanaka, Carvalho, Marcelo R. de, Akemi Shibuya, Zuanon, Jansen, Shibuya, Akemi, Jansen Zuanon   +8 more
core   +1 more source