Results 51 to 60 of about 1,823 (231)

A test of the utility of DNA barcoding in the radiation of the freshwater stingray genus Potamotrygon (Potamotrygonidae, Myliobatiformes)

open access: yesGenetics and Molecular Biology, 2008
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.
Daniel Toffoli   +5 more
doaj   +1 more source

Arraias em rios da região Sudeste do Brasil: locais de ocorrência e impactos sobre a população Stingrays in rivers in southeastern Brazil: occurrence localities and impact on the population

open access: yesRevista da Sociedade Brasileira de Medicina Tropical, 2010
INTRODUÇÃO: No presente trabalho objetivamos descrever o processo de colonização da Bacia do Alto Paraná, Sudeste do Brasil, por arraias, demonstrando sua atual situação e provável tendência, os impactos gerados e discutindo algumas ações de manejo e ...
Domingos Garrone Neto   +1 more
doaj   +1 more source

Record of the freshwater stingrays Potamotrygon brachyura and P. motoro (Chondrichthyes, Potamotrygonidae) in the lower Uruguay river, South America Registro das raias de água doce Potamotrygon brachyura e P. motoro (Potamotrygonidae) no baixo rio Uruguai, America do Sul

open access: yesActa Amazonica, 2012
Freshwater stingrays, or potamotrygonids, are restricted to Neotropical river drainages. These elasmobranchs are well adapted to freshwater environments and the number of described species gradually increases as further research is carried out.
María Cristina Oddone   +2 more
doaj   +1 more source

TRAFFICKING OF ORNAMENTAL FISH IN THE BRAZILIAN AMAZON

open access: yesBoletim do Instituto de Pesca, 2021
The trafficking of ornamental fish is growing on a yearly basis in the Brazilian Amazon. This represents a serious threat to the biodiversity of the region.
Hélio BELTRÃO   +3 more
doaj   +3 more sources

Proposal of a non-lethal visual census method to estimate freshwater stingray abundance

open access: yesUniversitas 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

Ornamental fishing in the region of Barcelos, Amazonas: socioeconomic description and scenario of activity in the view of “piabeiros” [PDF]

open access: yesBrazilian Journal of Biology, 2019
The Negro river basin is considered the largest area of extractive of ornamental fish in Brazil. This area has fundamental importance for the populations from the Amazon.
D. S. Ladislau   +9 more
doaj   +1 more source

Trends in Medicinal Uses of Edible Wild Vertebrates in Brazil

open access: yesEvidence-Based Complementary and Alternative Medicine, Volume 2017, Issue 1, 2017., 2017
The use of food medicines is a widespread practice worldwide. In Brazil, such use is often associated with wild animals, mostly focusing on vertebrate species. Here we assessed taxonomic and ecological trends in traditional uses of wild edible vertebrates in the country, through an extensive ethnobiological database analysis. Our results showed that at
Rômulo Romeu Nóbrega Alves   +3 more
wiley   +1 more source

Rhinebothrium jaimei sp. n. (Eucestoda: Rhinebothriidea: Rhinebothriidae): a new species from Neotropical freshwater stingrays (Potamotrygonidae) [PDF]

open access: yesFolia Parasitologica, 2015
Neotropical freshwater stingrays (Batoidea: Potamotrygonidae) host a diversity of parasites, including some, like their hosts, that are marine-derived. Among the parasites of potamotrygonids, the cestode fauna is the most diverse, with multiple genera having been reported, including genera endemic to the freshwaters of the Neotropics and genera that ...
Fernando P L, Marques, Florian B, Reyda
openaire   +2 more sources

Bioecología de la raya de agua dulce Potamotrygon magdalenae (Duméril, 1865) (Myliobatiformes) en la Ciénaga de Sabayo, Guaymaral, Colombia

open access: yesRevista 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   +1 more
doaj   +1 more source

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