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Trophic relationships among Antarctic fulmarine petrels : insights into dietary overlap and chick provisioning strategies inferred from stable-isotope (δ15N and δ13C) analyses
We used stable-isotope analysis (SIA) to evaluate trophic relationships in an Antarctic seabird community. We determined natural abundances of stable-nitrogen (δ 15 N) and stable-carbon (δ 13 C)Expand
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T he Endangered Species Act (ESA) is arguably the most important legislation passed by the United States Congress to protect species and their habitats (the use of the term "species" covers species,Expand
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Thermal Ecology and Ecological Energetics of California Spotted Owls
Abstract In this study, we used open-circuit respirometry and the doubly labeled water technique (DLW) to examine the thermal ecology and ecological energetics of California Spotted Owls (StrixExpand
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Polygyny and male parental care in Savannah sparrows: effects on female fitness
SummaryTo determine the effects of male mating status on female fitness, we compared the reproductive success, survival, and future fecundity of female Savannah sparrows (Passerculus sandwichensis)Expand
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Thermoregulation in Antarctic fulmarine petrels
Abstract We measured resting metabolic rates at air temperatures between ca. −5 and 30 °C in snow petrels (Pagodroma nivea), cape petrels (Daption capense), Antarctic petrels (ThalassoicaExpand
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Breeding biology of high-latitude Antarctic fulmarine petrels (Procellariidae)
This paper provides basic information about the breeding biology of four species of Antarctic fulmarine petrels breeding in the Rauer Islands, East Antarctica: Antarctic fulmar Fulmarus glacialoides,Expand
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Is the energy cost of begging by nestling passerines surprisingly low
McCarty (1996) reported that oxygen consumption rates (402) of resting and begging nestlings of five passerine species were little different and often equivalent. From this he concluded that beggingExpand
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Energy expenditure and food requirement of Cassin's Auklets provisioning nestlings
We used the doubly-labeled water technique to measure the field metabolic rate (FMR) of free-ranging adult Cassin's Auklets (Ptychoramphus aleuticus) that were provisioning half-grown nestlings. FMRExpand
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Energetics of nestling growth and parental effort in Antarctic fulmarine petrels
SUMMARY Antarctic fulmarine petrels breed in some of the coldest conditions encountered by any bird and their young grow twice as fast as predicted allometrically. To examine the energeticExpand
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Predator behavior favors clumped nesting in an oceanic seabird
Most seabird and numerous landbird species nest colonially. Nesting near conspecifics can confer protection from predators, an effect that is frequently mentioned as a selective agent favoring colonyExpand
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