Results 61 to 70 of about 1,538 (201)

Serum chemistry, thyroxine concentration, and blood cell morphology of wild, young Blackchin Guitarfish Glaucostegus cemiculus sampled on the eastern Mediterranean coastline

open access: yesJournal of Aquatic Animal Health, Volume 36, Issue 3, Page 281-299, September 2024.
Abstract Objective The Blackchin Guitarfish Glaucostegus cemiculus is endemic to the Mediterranean Sea and is critically endangered, but relevant routine laboratory data are unavailable. Our objectives were to determine the packed cell volume (PCV), comprehensive serum chemistry analytes, and serum total thyroxine (sTT4) concentration; compare serum ...
Nevo Schwartz   +5 more
wiley   +1 more source

Potamotrygon boesemani (Chondrichthyes: Myliobatiformes: Potamotrygonidae), a new species of Neotropical freshwater stingray from Surinam

open access: yesNeotropical Ichthyology
Potamotrygon boesemani, new species, is described from the Corantijn river drainage in Surinam. The species has a diagnostic dorsal color pattern formed by deep orange to red ocellated spots of irregular form, encircled by relatively broad black rings ...
Ricardo S. Rosa   +2 more
doaj   +1 more source

Diversidad gen?tica de potamotrygon motoro en las cuencas del Onrin?co y Amazonas colombiano [PDF]

open access: yes, 2017
61 p. Recurso Electr?nicoLa falta de claridad frente a la taxonom?a de Potamotrygon motoro y la ausencia de estudios previos de su diversidad gen?tica, hace a la especie vulnerable al ser la segunda especie de raya de agua dulce m?s extra?da y exportada ...
Renza Mill?n, Mariana
core  

Traumas e envenenamentos por animais aquáticos em pescadores de Coxim e Corumbá, estado de Mato Grosso do Sul, Brasil : identificação de agentes causadores, aspectos clínicos e medidas de primeiros socorros [PDF]

open access: yes, 2010
The fishes of continental Brazil have socioeconomic importance due to their potential for sport fishing and commercial and subsistence uses, as seen in the Upper Paraguay River Basin, particularly in the municipalities of the Pantanal region, where it is
Alho, Cleber José Rodrigues   +4 more
core   +4 more sources

Taxonomía, biología reproductiva y usos de rayas de agua dulce (Myliobatiformes: Potamotrygonidae) en el río Amazonas colombiano [PDF]

open access: yes, 2020
From the revision of 116 specimens of the Potamotrygonidae family collected in the Colombian Amazon River, the four genera described for the family are registered for the study area, with the species Heliotrygon gomesi, Plesiotrygon iwamae ...
Acosta Santos, Astrid Alexia
core   +1 more source

Sexual dimorphism of the pelvic fins in Potamotrygon motoro (Batoid: Potamotrigonidae)

open access: yesRevista de Investigaciones Veterinarias del Perú, 2023
Claspers in chondrichthyans are specialized elongations on the posterior side of the pelvic fins of males that are used for sperm transfer during copulation. The aim of this study was the description and characterization of the external morphology and skeletal components of the pelvic fin clasper of Potamotrygon motoro (Batoidea: Potamotrygonidae). The
Pérez, Dante   +4 more
openaire   +1 more source

Morfometria de raias continentais (Chondrichthyes, Potamotrygonidae) do alto rio Paraná, Brasil = Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae)

open access: yesActa Scientiarum: Biological Sciences, 2007
Potamotrygonidae constitui o único grupo recente de Chondrichthyes cujo habitat está restrito, exclusivamente, a águas continentais. Na planície de inundação do Alto rio Paraná, espécies desta família estabeleceram-se após o fechamento das comportas da ...
Antonio Guilherme Cândido da Silva   +1 more
doaj  

Ecological and Phenotypic Diversification after a Continental Invasion in Neotropical Freshwater Stingrays [PDF]

open access: yes, 2022
Habitat transitions are key potential explanations for why some lineages have diversified and others have not—from Anolis lizards to Darwin\u27s finches.
Dean, Mason N   +5 more
core   +1 more source

Parâmetros sanguíneos da arraia de água doce Potamotrygon orbignyi Castelnau, 1855 (Potamotrygonidae) da Bacia do Rio Negro, Amazonas, Brasil. [PDF]

open access: yes, 2017
A região Amazônica apresenta a maior diversidade de espécies de potamotrigonídeos, algumas com distribuição ampla como as arraias Paratrygon aiereba, Potamotrygon motoro e Potamotrygon orbignyi, sendo essa última encontrada nas bacias dos rios Amazonas ...
DIAS, M. T.   +5 more
core  

Condrictios de la Argentina y Uruguay: lista de trabajo [PDF]

open access: yes, 2007
Presentamos aquí una lista actualizada de los condrictios (tiburones, rayas, quimeras y pez elefante) que han sido citados de la Argentina y Uruguay, incluyendo las especies de agua dulce de la familia Potamotrygonidae.
Lucifora, Luis O., Menni, Roberto C.
core  

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