Results 41 to 50 of about 268 (153)

Sex‐Specific Early Life Corticosterone Stress‐Coping Capacity Is Linked to Mitochondrial Content and Telomere Maintenance

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
ABSTRACT Glucocorticoids are upregulated during acute challenges, contributing to maintenance of energy balance. However, if this upregulation exceeds a threshold or becomes chronic, it can lead to harmful effects. Investigating the factors behind between‐individual variation in the magnitude of the response to acute stress and how effectively ...
Mauricio Guillen‐Parra, Alberto Velando, Bibiana Montoya, Roxana Torres   +3 more
wiley   +1 more source

Gastrointestinal Helminths of Suliformes Birds from the Southern Coast of São Paulo, Brazil

Parasitologia
Seabirds of the families Fregatidae, Phalacrocoracidae and Sulidae, common on the southeastern coast of Brazil, form colonies and play a bioindicator role in coastal ecosystems due to their ecological habits.
Beatriz Brener, Guilherme Sena, Magda Antonello, Júlia Piolla, Michelle Fonseca, Marcelo Knoff   +5 more
doaj   +1 more source

Convergent mutations underpin the repeated evolution of brown plumage in seabirds

Ibis, EarlyView.
Recent genetic data have provided crucial insights into the evolution of animal colour phenotypes, with the melanocortin‐1 receptor (MC1R) frequently implicated in dramatic colour shifts. However, the extent to which similar phenotypes are underpinned by convergent mutations at this locus remains unclear.
Shanshan Shen, Graham A. McCulloch, Tania M. King, Nicolas J. Rawlence, Martyn Kennedy, Jonathan M. Waters   +5 more
wiley   +1 more source

Exposure of Magnificent Frigatebird (Fregata magnificens) and Brown Booby (Sula leucogaster) to Metals and Selenium in Rio de Janeiro State (Brazil) Coastal Waters

Orbital: The Electronic Journal of Chemistry, 2018
This study used feathers of brown booby (Sula leucogaster) and magnificent frigatebird (Fregata magnificens) from Cagarras Archipelago, an area under strong anthropogenic influence, for evaluating the exposure of these seabirds to Cd, Sn, Mn, Cu and Se ...
Janeide de Assis Padilha, Larissa Schmauder Teixeira da Cunha, Rayane Moreira de Castro, Olaf Malm, Paulo Renato Dorneles   +4 more
doaj   +3 more sources

Feeding associations between Guiana dolphins, Sotalia guianensis (Van Bénèden, 1864) and seabirds in the Lagamar estuary, Brazil Associações de alimentação entre o boto-cinza (Sotalia guianensis) (Van Bénèden, 1864) e aves marinhas no estuário do Lagamar, Brasil

Brazilian Journal of Biology, 2010
The main objective of the present study was to describe the characteristics regarding interactions between Guiana dolphins, Sotalia guianensis and seabirds in feeding associations in two distinct areas of the Lagamar estuary, Brazil.
MCO. Santos, JEF. Oshima, ES. Pacífico, E. Silva   +3 more
doaj   +1 more source

Enriching historical biologging datasets on seabirds using deep neural networks: A transformer‐based approach to infer energy expenditure proxy from GPS and environmental data

Methods in Ecology and Evolution, Volume 17, Issue 8, Page 2408-2423, August 2026.
Abstract Recent advances in biologging have led to the widespread use of accelerometers, which generate high‐resolution movement data essential for understanding animal behaviour. Derived from tri‐axial accelerometry, Overall Dynamic Body Acceleration (ODBA) serves as a proxy for energy expenditure that is less invasive and more cost‐effective than ...
Noémie Muquet, Adrien Brunel, Christophe Barbraud, Leandro Bugoni, Karine Delord, Guilherme Tavares Nunes, Jean‐Daniel Zucker, Sophie Lanco   +7 more
wiley   +1 more source

Seed Floras in Seabird Nests and the Possibility of Adhesion to Seabird Feathers via Their Nests

Plant Species Biology, Volume 41, Issue 4, July 2026.
Nests are important links between seabirds and plants, and are thought to initiate epizoochory of seabirds. 24 seed species were found in pelagic seabird nests, and 16 species of them had the potential to adhere to seabirds. Our finding indicates an overlooked pathway for the long distance dispersal of plants; epizoochory mediated by nests.
Kanon Mizukoshi, Kazuto Kawakami, Takashi Kamijo   +2 more
wiley   +1 more source

Shifting Seas, Changing Diets: Evidence of Temporal Dietary Shifts in Marine Megafauna in Southern Brazil (2017–2023)

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.
ABSTRACT Understanding the dietary dynamics of marine megafauna is essential for interpreting ecological interactions and assessing environmental changes in marine ecosystems. We analysed temporal trends in the diets of eight megafaunal species, comprising marine mammals, seabirds, and sea turtles.
Joao Bosco Gusmao, Mario Roberto Castro Meira‐Filho, Camila Domit   +2 more
wiley   +1 more source

Meteorological influence on a population of Sula leucogaster (Aves, Sulidae) at an Archipelago in the southern of Brazil

Neotropical Biology and Conservation, 2017
The Moleques do Sul Archipelago has great importance for seabirds on the Brazilian coast as it houses breeding populations of various species. This archipelago represents the southern limit for the breeding colonies of the brown boobies ( Sula leucogaster ).
Daniela De Carvalho Melo, Alvino Pedrosa Ferreira, Mônica Camargo Campoe, Sergey Alex Araújo, Léo Lynce Valle de Lacerda, Joaquim Olinto Branco   +5 more
openaire   +2 more sources

Combining transient dynamics and logistic‐asymptotic growth to study the recovery of two seabird populations after rat eradication

Population Ecology, Volume 67, Issue 4, Page 310-335, October 2025.
This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier, Christophe Barbraud, Maxime Amy, Sabine Orlowski, Jean Hivert, Gabrielle Dicque, Matthieu Le Corre   +6 more
wiley   +1 more source