Results 51 to 60 of about 269 (143)

Effects of egg exposure to atrazine and/or glyphosate on bone development in Podocnemis unifilis (Testudines, Podocnemididae)

Ecotoxicology and Environmental Safety, 2019
This study was designed to investigate skeletal changes in Podocnemis unifilis embryos derived from artificially incubated eggs exposed to different concentrations of atrazine, glyphosate or atrazine and glyphosate mixture. Forty-two eggs were randomly allocated to one of seven trays containing vermiculite treated distilled water (control group) or the
Hirano, Líria Queiroz Luz, Alves, Letícia da Silva, Menezes-Reis, Lorena Tannús, Mendonça, Juliana dos Santos, Simões, Karina, Santos, André Luiz Quagliatto, Vieira, Lucélia Gonçalves   +6 more
openaire   +3 more sources

ASSESSMENT OF A COMMUNITY MANAGEMENT PROGRAM OF RIVER TURTLES (PODOCNEMIDIDAE: Podocnemis) IN ZÁBALO, ECUADORIAN AMAZON

Revista Latinoamericana de Herpetología, 2023
In Zábalo community within the Cuyabeno Fauna Production Reserve, a 26-year local initiative aimed at river turtle management was initiated following a significant decline in Podocnemis unifilis and P. expansa populations. Despite the program's lengthy history, weak monitoring and validation procedures prompted a comprehensive evaluation of management ...
Santiago Varela, Michelle Vela-Torres, Felipe Borman, Mario Yánez-Muñoz, Randy Borman, Rafael Yunda, Humberto Yiyoguaje, Vicente Criollo, Valerio Machoa, Leonel Yiyoguaje, Francisco Machoa, Braulio Criollo, Alfonso Yiyoguaje, Jéssica Pacheco   +13 more
openaire   +1 more source

Ontogeny of the cranial bones of the giant amazon river turtle Podocnemis expansa Schweigger, 1812 (Testudines, Podocnemididae) = Ontogenia dos ossos do crânio em tartaruga-da-amazônia Podocnemis expansa Schweigger, 1812 (Testudines, Podocnemididae)

Acta Scientiarum: Biological Sciences, 2010
In order to determine the normal stages of formation in the sequence of ossification of the cranium of Podocnemis expansa in its various stages of development, embryos were collected starting on the 18th day of natural incubation and were subjected to ...
Lucélia Gonçalves Vieira, André Luiz Quagliatto Santos, Fabiano Campos Lima   +2 more
doaj  

New records of digeneans from Podocnemis spp. (Testudines, Podocnemididae) from Iquitos, Peru

Revista Peruana de Biología, 2011
We obtained 8 digestive tract of the turtle Podocnemis expansa and 18 of P. unifilis from the Belen market (Iquitos, Peru). Only digeneans were studied and identified.
Manuel Tantaleán, Nofre Sánchez, Oscar Pineda Catalan   +2 more
doaj   +1 more source

A systematic comparative description of extant turtle humeri, with comments on humerus disparity and evolution based on fossil comparisons

The Anatomical Record, Volume 307, Issue 11, Page 3437-3505, November 2024.
Abstract The humerus is central for locomotion in turtles as quadrupedal animals. Osteological variation across testudine clades remains poorly documented. Here, we systematically describe the humerus anatomy for all major extant turtle clades based on 38 species representing the phylogenetic and ecological diversity of crown turtles.
Guilherme Hermanson, Fernando A. M. Arnal, Tomasz Szczygielski, Serjoscha W. Evers   +3 more
wiley   +1 more source

Estrutura populacional, tamanho e razão sexual de Podocnemis unifilis (Testudines, Podocnemididae) no rio Guaporé (RO), norte do Brasil [PDF]

Phyllomedusa: Journal of Herpetology, 2004
Population structure, size and sex ratio in Podocnemis unifilis (Testudines, Podocnemididae) in the Guaporé river (RO), northern Brazil.Population structure and sex ratio of Podocnemis unifilis was studied from June to November 1989 and from March to ...
Augusto Fachín-Terán, Richard C. Vogt
doaj  

The topological organization of the turtle cranium is constrained and conserved over long evolutionary timescales

The Anatomical Record, Volume 307, Issue 8, Page 2713-2748, August 2024.
Abstract The cranium of turtles (Testudines) is characterized by the secondary reduction of temporal fenestrae and loss of cranial joints (i.e., characteristics of anapsid, akinetic skulls). Evolution and ontogeny of the turtle cranium are associated with shape changes.
Eve Miller, Hiu Wai Lee, Arkhat Abzhanov, Serjoscha W. Evers   +3 more
wiley   +1 more source

GENETIC VARIABILITY IN THE MAGDALENA RIVER TURTLE, PODOCNEMIS LEWYANA (DUMÉRIL, 1852), IN THE MOMPOS DEPRESSION, COLOMBIA VARIABILIDAD GENÉTICA DE LA TORTUGA DEL RÍO MAGDALENA, PODOCNEMIS LEWYANA (DUMÉRIL, 1852), EN LA DEPRESIÓN MOMPOSINA, COLOMBIA

Actualidades Biológicas, 2008
Two populations of the endangered Magdalena River turtle, Podocnemis lewyana, separated by 55 km in the Mompos Depression were sampled to quantify levels of genetic variation and inspect for evidence of genetic structure.
Adriana Restrepo, Bock Brian C., Vivian P. Páez   +2 more
doaj  

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

Frontiers in Ecology and Evolution
IntroductionSpatial 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, Fernanda Michalski, Fernanda Michalski, Fernanda Michalski, Darren Norris, Darren Norris, Darren Norris   +6 more
doaj   +1 more source

Gastrointestinal parasites of taricaya, Podocnemis unifilis (Troschel, 1848) (Testudines: Podocnemididae) from Iquitos, Peru

Revista Peruana de Biología, 2006
Many Amazonian animals are a valuable food source, for the rural and urban people of the Peruvian forest. Their meat is called carne de monte, and is the third source of protein food in the region.
Nofre Sánchez, Manuel Tantaleán, Dilys Vela, Alfonso Méndez   +3 more
doaj   +1 more source