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Fig. 4. Recovery oxygen consumption of feeding (post-prandial) and fasting
(post-absorptive) dives in free-ranging Weddell seals. Each point represents a
feeding dive paired with a fasting dive of equal distance traveled (within
6.8±1.7%) and duration (within 8.3±1.7%) for two male seals of
identical body mass (398 kg). The diagonal line through the origin represents
the line of equality for the cost of feeding and fasting dives. The short line
denotes the least-squares linear regression through the data points, as
described in the text.