Activity patterns of wintering Great SkuasStercorarius skua
نویسندگان
چکیده
منابع مشابه
Immune challenge affects basal metabolic activity in wintering great tits.
The costs of exploiting an organism's immune function are expected to form the basis of many life-history trade-offs. However, there has been debate about whether such costs can be paid in energetic and nutritional terms. We addressed this question in a study of wintering, free-living, male great tits by injecting them with a novel, non-pathogenic antigen (sheep red blood cells) and measuring t...
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Environmental conditions encountered by migratory seabirds in their wintering areas can shape their fitness. However, the underlying physiological mechanisms remain largely unknown as birds are relatively inaccessible during winter. To assess physiological condition during this period, we measured corticosterone concentrations in winter-grown primary feathers of female great skuas (Stercorarius...
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The diet of the brown skua (Catharacta skua loÈnnbergi) was studied at Mayes Island, Kerguelen archipelago, by collection of prey remains on 11 territories during the complete breeding cycle of the species there. In nine territories, collections were daily or every two days for a quantitative investigation of the diet. The blue petrel (Halobaena caerulea) and thin-billed prion (Pachyptila belch...
متن کاملDucks change wintering patterns due to changing climate in the important wintering waters of the Odra River Estuary
Some species of birds react to climate change by reducing the distance they travel during migration. The Odra River Estuary in the Baltic Sea is important for wintering waterfowl and is where we investigated how waterbirds respond to freezing surface waters. The most abundant birds here comprise two ecological groups: bottom-feeders and piscivores. Numbers of all bottom-feeders, but not piscivo...
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ژورنال
عنوان ژورنال: Bird Study
سال: 2014
ISSN: 0006-3657,1944-6705
DOI: 10.1080/00063657.2014.940839