Results 21 to 30 of about 972 (148)
Physiological parameters of freshwater stingrays from the Uatumã River Basin, Amazon, Brazil [PDF]
Anais da Academia Brasileira de CiênciasKnowledge of freshwater stingrays’ physiological parameters is essential for conserving elasmobranch diversity. This study aims to characterize the erythrogram and plasma biochemistry of freshwater stingrays from the Uatumã River basin for the first time.
MARIA FERNANDA S. GOMES +8 more
doaj +1 more source
Morphology and morphometry of blood cells of two species of freshwater stingrays (Chondrichthyes: Potamotrygoninae) from the lower Solimões river, Amazon [PDF]
Anais da Academia Brasileira de CiênciasCytomorphological evaluation of peripheral blood provides information about the health status of animals, in addition to being indicators of environmental contamination.
MARCIO QUARA DE C. SANTOS +3 more
doaj +1 more source
Ocorrência de hemoglobinas de efeito Root em peixes amazônicos [PDF]
Acta Amazonica, 1978 Resumo O efeito Root foi medido em hemolisados de representantes de 56 gêneros de peixes amazônicos. Hemolisados de várias espécies de peixes de respiração aérea apresentaram efeito Root, contrariamente às hipóteses publicadas.
Martha Farmer +3 more
doaj +1 more source
Proposal of a non-lethal visual census method to estimate freshwater stingray abundance
Universitas Scientiarum, 2016 There is not a current method to estimate South American freshwater stingray’s abundance. Therefore we designed a census method and tested it in the field.
Mónica Andrea Morales-Betancourt +1 more
doaj +1 more source
Acta Scientiarum: Biological Sciences, 2008 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 +1 more source
Does hemoparasite infection affect the hematological and plasma biochemical profile of free-living Potamotrygon motoro and Potamotrygon orbignyi? [PDF]
Anais da Academia Brasileira de CiênciasThis study aimed to evaluate the occurrence of hemoparasites and their effects on hematological and plasma biochemical parameters in stingrays from the lower Solimões River region, Amazonas.
MARCIO QUARA DE C. SANTOS +3 more
doaj +2 more sources
Biota Colombiana, 2018 Se registra por primera vez para Colombia (cuenca del Orinoco), cuatro especies de crustáceos ectoparásitos en rayas de agua dulce (Potamotrygonidae), género Potamotrygon.
Carlos Andrés Lasso +3 more
doaj +5 more sources
Neotropical IchthyologyA taxonomic revision of two nominal species of freshwater stingrays of the genus Potamotrygon previously considered valid, Potamotrygon falkneri Castex & Maciel, 1963 and Potamotrygon castexi Castello & Yagolkowski, 1969, was conducted based on a ...
João Paulo C. B. da Silva +1 more
doaj +1 more source
Analysis and cryopreservation of semen from stingrays of the genus Potamotrygon
, 2022 Os estudos sobre reprodução de raias do gênero Potamotrygon em ambiente natural são muito dificultados pelo habitat e hábitos de vida destes animais.
Ramos, Sofia Dressel
core +1 more source
Neotropical IchthyologyPotamotrygon 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