Fig. 2. Respirometry trace (A) and stomach temperature (B) of a European shag during a dive trial (post-absorptive). Arrows indicate when the bird entered and left the respirometry set-up. The trial lasted 32 min in water of 10.1°C. Note, the trace in A does not represent instantaneous metabolic rate but gives an indication of metabolic rate during a dive trial. See Materials and methods for details on how diving metabolic rate was calculated.