We measured oxygen consumption rate (O2) and body temperatures in 10 king penguins in air and water. O2 was measured during rest and at submaximal and maximal exercise before (fed) and after (fasted) an average fasting duration of 14.4 ± 2.3 days (mean ± 1 SD, range 10–19 days) in air and water. Concurrently, we […]