Results 11 to 20 of about 20,807 (310)

Passive Acoustic Monitoring as a Tool to Investigate the Spatial Distribution of Invasive Alien Species

open access: yesRemote Sensing, 2022
Invasive alien species (IAS) are a threat to biodiversity and ecosystem function worldwide. Unfortunately, researchers, agencies, and other management groups face the unresolved challenge of effectively detecting and monitoring IAS at large spatial and ...
José W. Ribeiro   +5 more
doaj   +1 more source

Geographic Variation in Organ Size in a Toad (Duttaphrynus melanostictus)

open access: yesAnimals, 2023
Adaptive evolution is the process by which organisms change their morphological, physiological and biochemical characteristics to adapt to different environments during long-term natural selection.
Weiye Deng   +4 more
doaj   +1 more source

Testing the Role of Natural and Sexual Selection on Testes Size Asymmetry in Anurans

open access: yesBiology, 2023
Directional asymmetry in testes size is commonly documented in vertebrates. The degree of testes size asymmetry has been confirmed to be associated with natural and sexual selection. However, the role of natural and sexual selection driving variations in
Shengnan Chen   +3 more
doaj   +1 more source

Sex Determination in Two Species of Anuran Amphibians by Magnetic Resonance Imaging and Ultrasound Techniques

open access: yesAnimals, 2020
The objective of the present study was to evaluate whether gender determination in two amphibian species (Kaloula pulchra and Xenopus laevis) can be reliably carried out by means of magnetic resonance imaging (benchtop magnetic resonance imaging; BT-MRI)
María José Ruiz-Fernández   +9 more
doaj   +1 more source

Immunoendocrinology and Ecoimmunology in Brazilian Anurans

open access: yesIntegrative and Comparative Biology, 2022
AbstractThis paper reviews several aspects of immunoendocrinology and ecoimmunology in Brazilian species of anurans under investigation for more than a decade, including (1) patterns of annual covariation of circulating steroids, calling behavior and innate immunity, (2) endocrine and immune correlates of calling performance, (3) behavioral and ...
Fernando Ribeiro, Gomes   +4 more
openaire   +2 more sources

CALL BROADCASTING AND AUTOMATED RECORDERS AS TOOLS FOR ANURAN SURVEYS IN A SUBARCTIC TUNDRA LANDSCAPE [PDF]

open access: yes, 2014
Relatively little is known about population ecology of anurans in arctic and subarctic tundra regions, in part because it is difficult to survey anurans in these landscapes.
Andersen, David E.   +3 more
core   +2 more sources

WETLAND OCCUPANCY OF POND-BREEDING AMPHIBIANS IN YOSEMITE NATIONAL PARK, USA [PDF]

open access: yes, 2015
We estimated wetland occupancy and population trends for three species of pond-breeding anurans in Yosemite National Park from 2007 – 2011. We used a double survey technique in which two observers independently surveyed each site on the same day.
Fellers, Gary M.   +2 more
core   +2 more sources

Trade in wild anurans vectors the urodelan pathogen Batrachochytrium salamandrivorans into Europe [PDF]

open access: yes, 2017
Pathogen pollution has caused dramatic losses of amphibian diversity on a global scale. The recently emerged chytrid fungus Batrachochytrium salamandrivorans (Bsal) has been hypothesized to have its origin in Asian urodelan populations, from which it may
Martel, An   +4 more
core   +2 more sources

Evolutionary insights into umami, sweet, and bitter taste receptors in amphibians

open access: yesEcology and Evolution, 2021
Umami and sweet sensations provide animals with important dietary information for detecting and consuming nutrients, whereas bitter sensation helps animals avoid potentially toxic or harmful substances. Enormous progress has been made toward animal sweet/
Huaming Zhong   +3 more
doaj   +1 more source

The high diversity and phylogenetic signal of antipredator mechanisms of the horned frog species of Proceratophrys Miranda-Ribeiro, 1920 (Amphibia: Anura: Odontophrynidae)

open access: yesActa Herpetologica, 2022
Phylogenetic signals indicate the phenotypic similarity of antipredator mechanisms among related species. Herein, we assessed the antipredator mechanisms of the horned frog Proceratophrys laticeps, compiled a database including closely phylogenetically ...
Cássio Zocca   +3 more
doaj   +1 more source

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