Results 221 to 230 of about 19,338 (301)

Peer Pressure: Do the Fitness Benefits of Animal Behavioral Traits Vary With Conspecific Density?

open access: yesEthology, EarlyView.
We show that the activity of juvenile North American red squirrels influenced their survival in a density‐dependent manner: more active individuals had higher survival under high conspecific density, whereas less active juveniles had higher survival under low densities. Juveniles who were both more active and aggressive were more likely to survive. Our
Deborah Ho   +5 more
wiley   +1 more source

The Company We Keep: Effects of Different Social Environments on Male Guinea Pig Behaviour and Hormones Over the Course of the Ontogeny

open access: yesEthology, EarlyView.
To examine how their behaviour and hormones change over different life phases, male guinea pigs experienced two different social environments from juvenility to adulthood. Only one environment contained social stimulation by unfamiliar conspecifics. Although no differences in testosterone and cortisol concentrations were found, it was interesting that ...
Maximilian Baldy, Sylvia Kaiser
wiley   +1 more source

From Social Experience to Social Behaviour: Hormonal and Behavioural Phenotypes During Adolescence in Male Guinea Pigs

open access: yesEthology, EarlyView.
To investigate how different social environments during adolescence influence hormones and behaviour, adolescent male guinea pigs were pair‐housed with a female either with or without additional social stimulation through repeated brief encounters with unfamiliar conspecifics.
Melanie Gleske   +3 more
wiley   +1 more source

Residency and Space Use of Endangered Smoothhound Sharks (Mustelus mustelus) in Relation to Marine Protection and Demersal Longline Fishing Along South Africa's South Coast

open access: yesFisheries Management and Ecology, EarlyView.
ABSTRACT Shark populations are declining globally and the effectiveness of marine protected areas (MPAs) as a conservation tool may vary by species and environmental context. This study assessed space use and residency of smoothhound sharks (Mustelus mustelus)—an endangered, yet highly exploited shark—in relation to spatial protection and fishing risk ...
Eugin Bornman   +3 more
wiley   +1 more source

Is Gillnet Prey Subsidizing Ontogenetic Diet Shifts and Early Weaning in Common Coastal Bottlenose Dolphins From the Southwestern Gulf of Mexico?

open access: yesFisheries Management and Ecology, EarlyView.
ABSTRACT Artisanal gillnet fisheries can concentrate prey and provide incidental food subsidies to marine predators, but their effects on early‐life foraging behavior and demography remain poorly resolved. The Alvarado bottlenose dolphin population that lives off the coast of Veracruz, Mexico, is well known for having chronic, frequent, and recurring ...
Eduardo Morteo   +5 more
wiley   +1 more source

Stable Isotope Analyses of Yellowfin and Blackfin Tuna Eye Lenses Reveal Life History Patterns

open access: yesFisheries Oceanography, EarlyView.
ABSTRACT Spatial geography, ontogenetic movement, and trophic patterns of mobile species are key elements of species life history, and knowledge of them is critical for effective marine resource management. For yellowfin tuna (Thunnus albacares; YFT) and blackfin tuna (Thunnus atlanticus; BLFT), residency durations and ontogenetic movements in the Gulf
Kylee M. Rullo   +3 more
wiley   +1 more source

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