Metabolic rate and body composition of harbour seals, Phoca vitulina, during starvation and refeeding

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Abstract
The metabolic rate of normally fed harbour seals (Phoca vitulina) was measured during starvation and the subsequent refeeding period. Resting metabolic rate was calculated from the y-intercept of the metabolic rate versus swimming speed curves and was 20% lower during the starvation period than during normal feeding. During starvation, about 50% of mass loss was fat, i.e., 77% of the energy was obtained from fat. Metabolic rate returned to the initial value about 1 week after the onset of refeeding.

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