Abstract
Summary Brown, C. R. 1988. Energy expenditure during incubation in four species of sub-Antarctic burrowing petrels. Ostrich 59:67-70. Energy expenditures of incubating Whitechinned Procellaria aequinoctialis, Greatwinged Pterodroma macroptera, Kerguelen Lugensa brevirostris and Blue Petrels Halobaena caerulea were measured from rates of oxygen consumption and compared to those of resting, non-breeding birds. Incubating metabolic rates tended to be lower than basal metabolic rates but not significantly so. The maintenance of metabolic rates at basal levels during incubation may allow petrels to conserve energy during the long incubation shift while the partner is away foraging at sea.
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