Results 51 to 60 of about 286 (141)

Anthropogenic impacts on yellow-spotted river turtle Podocnemis unifilis (Reptilia: Podocnemididae) from the Brazilian Amazon

Acta Biológica Colombiana, 2016
We investigated the influence of anthropogenic impacts on Podocnemis unifilis nesting on a stretch from Falsino river, with two forest reserves, and one urban area on the Araguari river, state of Amapá, eastern Amazon (Brazil).
Débora Regina Santos Arraes, Helenilza Ferreira Albuquerque Cunha, Marcos Tavares-Dias   +2 more
doaj   +1 more source

Nest Site Selection and Nesting Behavior of Reeves' Turtle (Mauremys reevesii) in Qichun County, Hubei Province, China

Ecology and Evolution, Volume 15, Issue 7, July 2025.
This study investigates the nest site selection and nesting behavior of Reeves' turtles (Mauremys reevesii) in Qichun County, China. Our findings indicate that slope, canopy cover, and distance from the water source significantly influence nest site selection.
Zihao Ye, Rongping Bu, Hai‐Tao Shi
wiley   +1 more source

Componentes alimenticios de podocnemis unifilis y p. Expansa (testudines: podocnemididae) en el resguardo curare-los ingleses, amazonas, colombia

Revista Colombiana de Ciencia Animal Recia, 2012
El estudio de los componentes alimenticios de los quelonios es importante para fundamentar planes de manejo y la preservación de sus hábitats. En este trabajo se reportan los ítems alimenticios de Podocnemis unifilis y P. expansa.
CAROLINA FIGUEROA F. ILBA, AUGUSTO FACHÍN-TERÁN, SANTIAGO R DUQUE   +2 more
doaj   +1 more source

Crescimento e eficiência alimentar de tracajás (Podocnemis unifilis) juvenis em cativeiro

DELOS: DESARROLLO LOCAL SOSTENIBLE, 2023
Dentre os quelônios da Amazônia, o tracajá, Podocnemis unifilis (Troschel, 1848), é uma das espécies mais capturadas para consumo na Amazônia brasileira, integrando a lista de animais vulneráveis à extinção. A espécie apresenta boa condição para criação em cativeiro, adaptando-se facilmente às condições impostas no manejo de criação, além de boa ...
Jamile da Costa Araújo, Yuri Ian Carvalho Furtado, Deybson dos Santos Oliveira, Willian Marques Ribamar, Paula Tais Cantuária Dos Santos   +4 more
openaire   +1 more source

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling

Molecular Ecology, Volume 34, Issue 11, June 2025.
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Camila Timana‐Mendoza, Alonso Reyes‐Calderón, Patrick Venail, Ricardo Britzke, Monica C. Santa‐Maria, Julio M. Araújo‐Flores, Miles Silman, Luis E. Fernandez   +7 more
wiley   +1 more source

Behavior of Rio Sao Francisco Piranhas in Response to Changes in Space and Density

Zoo Biology, Volume 44, Issue 3, Page 271-282, May/June 2025.
ABSTRACT Previous observations of Rio Sao Francisco piranhas (Pygocentrus piraya) at Cleveland Metroparks Zoo revealed frequent aggressive interactions, which were associated with the injury and death of some individuals. Fishes are known to increase aggressive behavior when available space is limited.
Ronald G. Oldfield, Josie E. Thal, Nick J. Zarlinga, Kristen E. Lukas, Jason D. Wark   +4 more
wiley   +1 more source

Simple radiography of the coelomic cavity in Podocnemis expansa and Podocnemis unifilis: proposal for an illustrative atlas as a diagnostic tool

Brazilian Journal of Animal and Environmental Research
Testudines are among the most popular reptiles chosen as exotic pets and, as a result, are referred more frequently for veterinary evaluation. However, it is difficult to investigate pathologies in these individuals due to their body conformation, which prevents a detailed physical examination.
Juliana Valentin Portela, Leandro Nassar Coutinho, Ellen Yasmin Eguchi Mesquita, Bármela da Silva   +3 more
openaire   +1 more source

Do Local Environmental Factors and Lunar Cycle Influence Timing and Synchrony of Oviposition of a Turtle with Strict Nocturnal Nesting?

Diversity, 2019
Timing of nesting affects fitness of oviparous animals living in seasonal environments, and females may cue on environmental factors for their nesting behavior, but these relationships are understudied in tropical turtles.
Tibisay Escalona, Nicole Valenzuela, Dean C. Adams   +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

Functional and Character Disparity Are Decoupled in Turtle Mandibles

Ecology and Evolution, Volume 14, Issue 11, November 2024.
Here, we compare functional disparity measured by biomechanical proxies and character disparity measured by discrete morphological characters in turtle jaws. Exploration of mandibular patterns reveals that several biomechanical configurations or character state combinations can lead to the same feeding type (i.e., convergence) or that high functional ...
Jasper Ponstein, Guilherme Hermanson, Merlin W. Jansen, Johan Renaudie, Jörg Fröbisch, Serjoscha W. Evers   +5 more
wiley   +1 more source