Energy expenditures, activity budgets, and prey harvest of breding common murres

We used doubly labeled water and electronic timers to measure field metabolic rates (FMRs) and activity budgets of Common Murres (Uriu anlge) breeding in eastern Newfoundland. Mean FMR (1789 ± 265 kJ.day-I) was about 50% higher than predictions for seabirds. The high FMR may be related to thermal costs in a cold ocean environment and to high locomotion costs associated with a wing structure that is a compromise between flying and diving...