Results 31 to 40 of about 2,430 (247)
Ecological Applications, Volume 33, Issue 1, January 2023., 2023 Abstract Environmental DNA (eDNA) metabarcoding has shown promise as a tool for estimating biodiversity and early detection of invasive species. In aquatic systems, advantages of this method include the ability to concurrently monitor biodiversity and detect incipient invasions simply through the collection and analysis of water samples.
Andrew R. Mahon +2 more
wiley +1 more source
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
, 2017 Identification key for species of the Potamotrygon scobina complex 1a. Dorsal disc color with a reticulate, polygonal pattern, lacking ocelli; whitish blotches, when present, very small; tail with dorsal polygonal color pattern at base; dorsal tail thorns at base composed of 2 or 3 irregular rows................. P. limai. 1b.
João Pedro Fontenelle +1 more
openaire +4 more sources
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
Potamotrygon jabuti Carvalho 2016
, 2023 Published as part of Lima, Arthur De, Loboda, Thiago Silva, Gianeti, Michel Donato, Silva, João Paulo Capretz Batista Da & Pinna, Mario De, 2023, Type specimens of Elasmobranchii in the Museu de Zoologia da Universidade de São Paulo (MZUSP), pp. 301-332 in Zootaxa 5296 (3) on pages 315-316, DOI: 10.11646/zootaxa.5296.3.1, http://zenodo.org/record ...
Lima, Arthur De +4 more
openaire +2 more sources
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
Potamotrygon albimaculata Carvalho 2016
, 2023 Potamotrygon albimaculata Carvalho, 2016 Holotype: MZUSP 105016; adult female, 497 mm DW (approximately the same DW as cited in Carvalho, 2016a); (Fig. 9); Pousada Santa Rosa, left bank of Rio Teles Pires —tributary of Rio Tapajós, Mato Grosso state, Brazil; 8º46’45’’S, 57º27’55’’W; depth not listed; M. R. de Carvalho et al.; 06 Dec 2005.
Lima, Arthur De +4 more
openaire +2 more sources
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
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
Potamotrygon adamastor Fontenelle & Carvalho 2017
, 2023 Published as part of Lima, Arthur De, Loboda, Thiago Silva, Gianeti, Michel Donato, Silva, João Paulo Capretz Batista Da & Pinna, Mario De, 2023, Type specimens of Elasmobranchii in the Museu de Zoologia da Universidade de São Paulo (MZUSP), pp. 301-332 in Zootaxa 5296 (3) on pages 310-311, DOI: 10.11646/zootaxa.5296.3.1, http://zenodo.org/record ...
Lima, Arthur De +4 more
openaire +2 more sources