Results 191 to 200 of about 4,111 (235)

Anthropogenic threats increase vulnerability of Podocnemis unifilis nesting areas in the most protected Brazilian Amazon State

Frontiers in Ecology and Evolution
Spatial prioritization is essential for conservation strategies seeking to reverse population losses among Amazonian freshwater turtles, including the yellow-spotted river turtle (Podocnemis unifilis).
Luã Aleff de Paula Silva, F. Michalski, D. Norris   +2 more
semanticscholar   +1 more source

THE IMPORTANCE OF NIDIFICATION ENVIRONMENT IN THE PODOCNEMIS EXPANSA AND PODOCNEMIS UNIFILIS PHENOTYPES (TESTUDINES: PODOCNEMIDIDAE)

South American Journal of Herpetology, 2007
Abstract This work analyses the influence that nest site characteristics have over natural incubation in freshwater turtles Podocnemis expansa and Podocnemis unifilis. Results indicate that neither carapace size nor weight of P. expansa hatchlings depends on environmental characteristics.
Paulo D. Ferreira Júnior, Ariadne Z. Castro, Paulo T. A. Castro   +2 more
openaire   +1 more source

Eggshell composition of Amazon turtle (Podocnemis expansa) is altered after incubation in substrates containing glyphosate and fipronil formulations.

Science of the Total Environment, 2023
Besides its crucial role during embryo development, eggshells are an essential bioindicator of environmental contaminants. However, the effects of contaminant exposure during incubation on the eggshell composition remain poorly known for freshwater ...
Juliana dos Santos Mendonça, L. G. Vieira, L. Hirano, G. Qualhato, J. C. D. de Almeida, A. L. Santos, Evandro de Abreu Fernandes, G. Malafaia, D. Andrade   +8 more
semanticscholar   +1 more source

Aproximación a aspectos poblacionales y de uso de hábitat de la tortuga terecay Podocnemis unifilis en la Reserva ProAves El Jaguar, Mapiripán, Meta

Revista Conservación Colombiana
Se realizó un estudio en la Reserva ProAves El Jaguar (municipio de Mapiripán, Meta, Colombia) para reconocer algunos aspectos de la ecología poblacional de la tortuga terecay Podocnemis unifilis en tres hábitats acuáticos (río, laguna y caño) durante la
Viviana Pinilla-Ortigoza, Abelardo Rodríguez Bolaños   +1 more
semanticscholar   +1 more source

Growth, feed efficiency and carcass yield of female yellow-spotted amazon river turtles (Podocnemis unifilis) subjected to different stocking densities

REVISTA DELOS
The yellow-spotted amazon river turtle, Podocnemis unifilis, is one of the most consumed species in the Amazon region. However, the basic zootechnical parameters of its production in captivity are not yet fully established to support a sustainable ...
Jamile da Costa Araújo, Yuri Ian Carvalho Furtado, Paula Tais Cantuária Santos, D. D. S. Oliveira, William Ribamar Marques   +4 more
semanticscholar   +1 more source

Thermal Environment Characteristics of Podocnemis expansa and Podocnemis unifilis Nesting Areas on the Javaés River, Tocantins, Brazil

Chelonian Conservation and Biology, 2006
ABSTRACT Subsurface temperature variation suggests that the thermal environment of giant Amazon river turtle (Podocnemis expansa) nests is influenced by the proximity of the water table and by the nest depth. The difference between vertical temperature gradients along fluvial beaches indicates that nest placement can exert a significant influence on ...
Paulo Dias Ferreira Júnior, Paulo de Tarso Amorim Castro   +1 more
openaire   +1 more source

Primer registro para la Tortuga del río Magdalena (Podocnemis lewyana Duméril, 1852), con evidencia de depredación antrópica en la Ciénaga de Mallorquín, Barranquilla, Colombia

Revista Colombiana de Ciencia Animal Recia
En esta nota se realiza el primer registro de la tortuga de río Magdalena (P. lewyana), para la ciénaga de Mallorquín en Barranquilla, Atlántico, Colombia. Este primer registro se basa en los restos óseos (plastrón) de un individuo que presenta evidencia
J. S. Mendoza-Roldán
semanticscholar   +1 more source

Enterobacteriaceae Associated with Eggs of Podocnemis expansa and Podocnemis unifilis (Testudines: Chelonia) in Nonpolluted Sites of National Park of Araguaia Plains, Brazil

Journal of Zoo and Wildlife Medicine, 2010
Fertile eggs of Podocnemis expansa and Podocnemis unifilis were investigated for the presence of enterobacteria, as these two endangered species have the potential for conservation measures that include egg transfer. Knowledge of normal microflora associated with turtles and turtle eggs would help effectively manage the transfer of these eggs among ...
Paula Benevides, de Morais, Kleverson Wessel, de Oliveira, Adriana, Malvásio, Adson Gomes, de Ataíde, Raphael Sanzio, Pimenta   +4 more
openaire   +2 more sources

Pneumoatractis podocnemis n. gen., n. sp. (Nematoda: Atractidae) from the Yellow-Spotted Amazon River Turtle, Podocnemis unifilis (Testudines: Pelomedusidae)

Comparative Parasitology, 2009
Nematodes collected at postmortem examination from the lungs of a yellow-spotted Amazon River turtle, Podocnemis unifilis, are described and assigned to a new genus, Pneumoatractis, the twenty-first genus of the superfamily Cosmocercoidea, family Atractidae.
Charles R. Bursey, Drury Reavill, Ellis Greiner   +2 more
openaire   +1 more source

Blood biochemistry and relations among Podocnemis turtles (pleurodira, pelomedusidae)

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1978
Agglutination, precipitation and electrophoresis of hemoglobin and serum point to a core of five Podocnemis species (P. erythrocephala, P. expansa, P. lewyana, P. unifilis and P. vogli), with a sixth species (P. sextuberculata) fringing this cluster. 1. 2. In addition, the data indicate that P. dumeriliana and P.
Wayne Frair, Russell A. Mittermeier, Anders G.J. Rhodin   +2 more
openaire   +1 more source