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Fig. 4. Mean stomach temperature (± s.e.m.) of double-crested cormorants
during HIF trials at air temperatures within their thermoneutral zone
(N=5 birds, n=12 trials). The temperature drop at 0 min is
caused by the ingestion of a 100 g herring. Note that temperature reaches
pre-ingestion levels within
40 min of eating the fish, after which
temperature remains stable throughout the remainder of the trial.