Results 161 to 170 of about 663 (179)
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A Demographic Study of the Arrau Turtle (Podocnemis expansa) in the Middle Orinoco River, Venezuela
Chelonian Conservation and Biology, 2010Abstract Podocnemis expansa (the giant South American or arrau turtle) is a freshwater turtle in critical risk of extinction, distributed along the Orinoco, Amazon, and Esequibo river basins. Protection of nesting beaches and headstarting of hatchlings has been in progress since 1989 on the Arrau Turtle Wildlife Refuge located in the Middle Orinoco ...
Guillermo R Barreto
exaly +2 more sources
NESTS CHARACTERIZATION AND SEXUAL IDENTIFICATION OF PODOCNEMIS EXPANSA, AMAZON TURTLE
2022As alterações climáticas e os impactos que o planeta vem sofrendo com as ações humanas, tornam os monitoramentos ecológicos e da biodiversidade imprescindíveis. Estudos sobre determinação sexual dependente da temperatura de incubação dos ovos, em quelônios, apresentam vários desafios, sendo um deles relacionado à identificação sexual dos filhotes.
Gonçalves Kagueiama, Ana Karla +5 more
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CONSTANT, SHIFT, AND NATURAL TEMPERATURE EFFECTS ON SEX DETERMINATION INPODOCNEMIS EXPANSATURTLES
Ecology, 2001Environmental sex determination may yield biased sex ratios, as is the case in many reptilian species with temperature-dependent sex determination (TSD). Determin- ing TSD thermal ecology is important to understanding sex ratio evolution in those species, as TSD systems may pose a challenge to Fisherian models that predict the production of 1:1 sex ...
Nicole Valenzuela
exaly +2 more sources
Research in Veterinary Science, 2012
The Arrau turtle (Podocnemis expansa) is an endangered species, as a result of long-lasting, unsustainable exploitation. To obtain reference haematological values from the wild Podocnemis expansa during post-laying, 20 turtles were captured in the Orinoco River. Blood was obtained from the dorsal cervical sinus in lithium heparin tubes. Red blood cells
M, Rossini +4 more
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The Arrau turtle (Podocnemis expansa) is an endangered species, as a result of long-lasting, unsustainable exploitation. To obtain reference haematological values from the wild Podocnemis expansa during post-laying, 20 turtles were captured in the Orinoco River. Blood was obtained from the dorsal cervical sinus in lithium heparin tubes. Red blood cells
M, Rossini +4 more
openaire +2 more sources
Journal of Morphology, 2011
AbstractWe address the chondrogenic formation of the limbs and the mesopodial ossification pattern of the Pleurodira Podocnemis expansa, to resolve the homology of these elements as well as the pattern of connection of the autopodial elements and the origin of the digital arch. Embryos and juveniles of P.
Lucélia Gonçalves, Vieira +3 more
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AbstractWe address the chondrogenic formation of the limbs and the mesopodial ossification pattern of the Pleurodira Podocnemis expansa, to resolve the homology of these elements as well as the pattern of connection of the autopodial elements and the origin of the digital arch. Embryos and juveniles of P.
Lucélia Gonçalves, Vieira +3 more
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Temperature-Dependent Sex Determination in Podocnemis expansa (Testudinata: Pelomedusidae)
Biotropica, 1985Cleber J. R. Alho +2 more
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Developmental heart morphology in the Amazon turtle Podocnemis expansa (Testudines: Podocnemidae)
Zoomorphology, 2023Emanuel Lucas Bezerra Rocha +8 more
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Biodiversity Record: A giant Amazon river turtle, Podocnemis expansa, at Punggol
Nature in Singapore, 17, 1 ...openaire +1 more source