Results 31 to 40 of about 2,829 (147)

Of all shapes and sizes: a theoretical framework for animal‐mediated terrestrial heterogeneity across scales

Ecography, Volume 2025, Issue 9, September 2025.
Animals redistribute elements throughout their lives by depositing wastes and carcasses. Growing evidence shows that these zoogeochemical processes enhance landscape diversity and heterogeneity worldwide. We provide a descriptive framework for understanding how direct animal depositions (i.e.
Kristy M. Ferraro, Janey R. Lienau
wiley   +1 more source

Food limitation reduces risk avoidance by prey, but does not increase kill rates in a simple predator–prey system

Ecosphere, 2023
Prey often induce antipredator behaviors when balancing food acquisition against safety. The starvation–predation hypothesis (SPH) posits that, during food shortages, the risk of starvation requires prey to forego antipredator behavior to increase ...
Francisco J. Molina, Justine A. Smith, Emiliano Donadio, Arthur D. Middleton, Jonathan N. Pauli, Jacob R. Goheen   +5 more
doaj   +1 more source

Helmintiasis en vicuñas (Vicugna vicugna) en el distrito de Contumaza (Cajamarca, Perú)

Revista de Investigaciones Veterinarias del Perú, 2022
El objetivo del estudio fue estimar las prevalencias y cargas de helmintos gastrointestinales en vicuñas en el distrito de Contumazá, Cajamarca, así como determinar su asociación con las variables edad y sexo e identificar los géneros parasitarios.
Joao Curay C., Amanda Chávez V., Rosa Pinedo V., Néstor Falcón P.   +3 more
openaire   +3 more sources

Same data, different results? Machine learning approaches in bioacoustics

Methods in Ecology and Evolution, Volume 16, Issue 8, Page 1574-1586, August 2025.
Abstract Automated acoustic analysis is increasingly used in behavioural ecology, and determining caller identity is a key element for many investigations. However, variability in feature extraction and classification methods limits the comparability of results across species and studies, constraining conclusions we can draw about the ecology and ...
Kaja Wierucka, Derek Murphy, Stuart K. Watson, Nikola Falk, Claudia Fichtel, Julian León, Stephan T. Leu, Peter M. Kappeler, Elodie F. Briefer, Marta B. Manser, Nikhil Phaniraj, Marina Scheumann, Judith M. Burkart   +12 more
wiley   +1 more source

VASCULARIZACION DEL PARENQUIMA TESTICULAR DE LA VICUÑA vicugna vicugna

Revista Investigaciones Altoandinas - Journal of High Andean Investigation, 2013
<p>Investigaciones sobre la vascularización del testículo de vicuñas aún no fueron estudiadas con técnicas de corrosión y formación de moldes vasculares para la comprensión de la fisiología reproductiva de esta especie. El objetivo del estudio detalló la organización vascular del parénquima testicular de la vicuña tanto arterial y venosa.
LUIS OLIVERA MAROCHO, CIRIACO ZUÑIGA ZUÑIGA, WASHINGTON CASTRO   +2 more
openaire   +1 more source

On the Lack of Domestic Dogs in Pre‐Columbian Lowland Amazonia and Their Deep History of Entanglements With Humans in South America

The Journal of Latin American and Caribbean Anthropology, Volume 30, Issue 2, June 2025.
ABSTRACT Data from archaeology, ethnography, and ethnohistory document entanglements of dogs among South American Indigenous societies during pre‐Columbian and colonial times. The prolific presence and uses of dogs in the Central Andes and in parts of the Paraná Basin, Patagonia, and Circum‐Caribbean regions contrast with the conspicuous lack of ...
Marcelo R. Sánchez‐Villagra, Cristiana Bertazoni, Felipe Vander Velden   +2 more
wiley   +1 more source

Utilización racional de la vicuña silvestre en Perú

Acta Zoológica Lilloana, 1979
Ningún otro mamífero silvestre de los Andes es tan conocido como la vicuña (Vicugna vicugna Molina 1782). Este esbelto, y llamativo animal siempre ha ocupado un lugar destacado tanto en las canciones, leyendas y narraciones populares, como en la ...
K. C. Otte, R. K. Hofmann
doaj  

Responses of a large herbivore to predation risk are modulated by intrinsic and extrinsic factors

Ecosphere, Volume 16, Issue 5, May 2025.
Abstract Prey species can perceive and respond to spatiotemporal variation in predation risk to increase survival. In addition to adjusting spatial and temporal activity patterns to avoid predation, prey employ other antipredator behaviors, such as vigilance and fleeing, and these behaviors can be further modulated by intrinsic, environmental, and ...
Michael S. Muthersbaugh, Elizabeth A. Saldo, Alex J. Jensen, Jay Cantrell, Charles Ruth, Beth E. Ross, John C. Kilgo, David S. Jachowski   +7 more
wiley   +1 more source

Comunidades locais, recursos naturais e mercado global

Desenvolvimento e Meio Ambiente, 2010
This paper addresses the interserction between public policies on biodiversity conservation, povertyreduction and husbandry production and the different agendas and perspectives from the social actorsinvolved from the international to the national level.
Gabriela Lichtenstein
doaj   +1 more source

Pharmacokinetics of Orally Administered Prednisolone in Alpacas

Frontiers in Veterinary Science, 2021
This study aimed to determine the pharmacokinetics of prednisolone following intravenous and oral administration in healthy adult alpacas. Healthy adult alpacas were given prednisolone (IV, n = 4), as well as orally (PO, n = 6).
Ricardo Videla, Carla Sommardahl, Joe Smith, Joe Smith, Deanna M. W. Schaefer, Sherry Cox   +5 more
doaj   +1 more source