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Predation and antipredator tactics of nesting black brant and lesser snow geese
Coloniality and nest defence were examined in black brant Branta bernicla nigricans and lesser snow geese Chen caerulescens caerulescens. Increased nest density had no effect on nest survival, egg survival, or likelihood ...
Digestion and body composition in muskoxen
Muskoxen (Ovibos moschatus) are relatively large herbivores living in an arctic environment where forage is sparse and its availability during long winters is often much reduced by snow and ice. Muskoxen cope by obtaining ...
Effects of forest fragmentation on the demography of ovenbirds (Seiurus aurocapillus) in the boreal forest
The demography of ovenbirds (Seiurus aurocapillus) was compared in landscapes highly fragmented by agriculture, moderately fragmented by commercial harvesting, and in contiguous boreal forest of Saskatchewan. Various ...
Ecophysiological studies of body composition, body size and reproduction in polar bears
For the polar bear (Ursus maritimus), a terrestrial carnivore on the highest trophic level in the Arctic marine ecosystem, periods of nutritional restriction or fasting are a characteristic feature of an annual cycle. ...