Results 71 to 80 of about 2,821 (239)

Disturbance by jet boating increases corticosterone concentrations in the black‐backed gull (Larus dominicanus)

New Zealand Journal of Zoology, Volume 52, Issue 5, Page 537-550, December 2025.
ABSTRACT Recreational activities such as jet boating have the potential to disturb native birds that rely on braided river habitats. To examine whether jet boating affects levels of glucocorticoid hormones, which can increase in animals under stress, we compared concentrations of corticosterone in the faeces of nesting black‐backed gulls (Larus ...
Sanaz Safavian, James V. Briskie, Elissa Cameron, Hazel Chapman   +3 more
wiley   +1 more source

Foraging movements of emperor penguins at Pointe Géologie, Antarctica. [PDF]

, 2008
International audienceThe foraging distributions of 20 breeding emperor penguins were investigated at Pointe Ge´ologie, Terre Ade´lie, Antarctica by using satellite telemetry in 2005 and 2006 during early and late winter, as well as during late spring ...
Ancel, A., Beaulieu, M., Gilbert, C., Plötz, Joachim, Wilson, R. P., Zimmer, Ilka   +5 more
core   +2 more sources

Patterns in tern trophic diversity in a region experiencing rapid climate change

Ecosphere, Volume 16, Issue 10, October 2025.
Abstract Foraging plasticity provides a mechanism for long‐lived species to adapt to rapidly changing environments. When shifts in food availability occur, individual variation in plasticity can lead to an increase in within‐species trophic diversity. We tested for drivers of trophic diversity in Arctic tern (Sterna paradisaea) and common tern (Sterna ...
Natasha J. Gownaris, Linda J. Welch, Jill E. Tengeres   +2 more
wiley   +1 more source

In depth studies of Magellanic foraging behavior: Can we estimate prey consumption by perturbations in the profile? [PDF]

, 2003
A new concept based on analysis of dive depth data was developed to help estimate prey consumption in ten free-ranging Magellanic penguins (Spheniscus magellanicus) that were brooding chicks.
Simeone, Alejandro, Wilson, Rory P.
core   +1 more source

Environmental and Evolutionary Forces Shaping Penguin Geographic Limits

Journal of Biogeography, Volume 52, Issue 9, September 2025.
ABSTRACT Aim Penguins are seabirds exclusively found in the Southern Hemisphere, with their existence dating back to the late Cretaceous. Despite their exceptional dispersal capabilities, which allow them to inhabit a wide range of environments—from polar regions to temperate zones, and even near the Equator—penguins are absent in the Northern ...
Amanda Mourão Santos, Ubirajara Oliveira   +1 more
wiley   +1 more source

Reconstructing the past using futuristic developments: Trends and perspectives using logger technology on penguins [PDF]

, 2004
Over the last two decades there has been remarkable progress in the development of sensory systems coupled with loggers that have been attached to free-living marine animals.
Wilson, Rory P.
core  

Is What Comes out the Same as What Goes in? A Preliminary Investigation of the Isotopic Impacts of Digestion by Red‐Tailed Hawks (Buteo jamaicensis) and Eurasian Eagle Owls (Bubo bubo)

Ecology and Evolution, Volume 15, Issue 5, May 2025.
Isotope analysis of predator feces and consumed prey remains can be used to non‐invasively track diet and reconstruct past environment and climate conditions. However, one must account for the isotopic difference between diet and feces, as well as the possible influence of digestion on consumed prey tissues.
Brooke Erin Crowley, Madison Laurel Greenwood, Rachel Elizabeth Brown Reid   +2 more
wiley   +1 more source

Fishermen´s perceptions of interactions between seabirds and artisanal fisheries in the Chonos archipelago, Chilean Patagonia [PDF]

, 2013
Interactions between seabirds and commercial fishing activities have been well documented but little information is available regarding the impacts of more traditional fishing practices on seabird populations.
Arriagada, Aldo M., Cabezas, Luis A., Ojeda, Jaime, Schlatter, Roberto P., Suazo, Cristián G.   +4 more
core   +1 more source

The relationship of telomere length to baseline corticosterone levels in nestlings of an altricial passerine bird in natural populations [PDF]

, 2015
Indexación: Web of Science; Scopus.Background: Environmental stressors increase the secretion of glucocorticoids that in turn can shorten telomeres via oxidative damage.
Guerrero, C.J., Krause, J.S., Quirici, V., Vásquez, R.A., Wingfield, J.C.   +4 more
core   +1 more source

Balancing ecotourism and wildlife management through a conservation behavior approach

Conservation Science and Practice, Volume 7, Issue 3, March 2025.
We surveyed ecologists, conservationists, and ecotourism professionals to investigate consequences of ecotourism on animal behavior. We highlight four main behavioral themes and solutions for engendering more sustainable ecotourism that mitigates behavioral impacts.
Rachel Y. Chock, Eduardo Bessa, Josue David Arteaga‐Torres, Liv Baker, Richard Buchholz, Barbara Clucas, Cassandra Nuñez, Gabriela M. Pinho, Bruce A. Schulte, Daniel T. Blumstein, Bernard Kitheka, Alexander G. Allison, J. Edgardo Arevalo, Debra A. Hamilton, Claudio M. Monteza‐Moreno, Laney H. Nute, Javier Rodríguez‐Fonseca, Luis Sandoval, Jessica Stamn, Jennifer L. Verdolin, Lynn Von Hagen, Jimmy W. Wehsener, Brett M. Seymoure   +22 more
wiley   +1 more source