... to assign a behaviour to each time step, and then calculates energy expenditure based on activity-specific metabolic rates assigned to each behaviour. Here, we used GPS-accelerometry in breeding black-legged kittiwakes ( Rissa tridactyla , n =80) to calculate DBA and time–energy budgets derived from simple...

... time scales. Here, we developed a novel method for comparing active and resting costs in 66 pre-breeding and breeding seabirds (black-legged kittiwakes, Rissa tridactyla ) by combining accelerometry and triiodothyronine (T3) as proxies for active and resting costs, respectively. Active energy costs...

... for correspondence ( [email protected] ) 18 2 2011 © 2011. 2011 arctic seabird fitness Rissa tridactyla stress hormones timing of breeding Breeding at the right time is one of the most important factors for successful reproduction in a fluctuating environment (e.g. Lack...

... 2010. 2010 DLW single sample behavioural effect nest attendance field metabolic rate Rissa tridactyla The doubly labelled water (DLW) method ( Lifson and McClintock, 1966 ; Nagy, 1980 ; Speakman, 1997 ) is the current standard technique to estimate the energy expenditure of free...