Results 61 to 70 of about 532 (174)
Acta Biológica Colombiana, 1992 The histological and organogenical development of the turtle Podocnemis unifilis are presented. This study covers 28 chronological steps which were defined in a period of 95 days.
Nory Astrid Guzman Ballesteros +1 more
doaj
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 +6 more
openaire +3 more sources
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 +2 more
doaj +1 more source
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 +2 more
doaj +1 more source
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 +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 +4 more
wiley +1 more source
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 +2 more
doaj +1 more source
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 +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 +5 more
wiley +1 more source
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 +3 more
wiley +1 more source