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Fig. 7. Archival tag record demonstrating fasting and feeding in a wild Pacific
bluefin tuna (
16 kg). Depth (black), peritoneal cavity temperature
(Tb, red), and ambient temperature
(Ta, blue) are shown. Day and night are represented as
light and dark bars, respectively. In (A) regular feeding events are indicated
by a rise in peritoneal cavity temperature resulting from digestion. In (B) a
stable Tb elevated only slightly relative to
Ta indicates the absence of feeding events for four days,
followed by the resumption of feeding.
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