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Fig. 2. Data from 141 trials of 18 individual Terrapene ornata walking on
the level showing (A) rate of oxygen consumption versus speed for all
trials, (B) cost of transport (COT) versus speed for all trials, and
(C) minimum COT (COTmin) for up to 10 trials for each individual
versus speed. Dashed line indicates the expected COT based on mass
(Full, 1989). Average resting
O2 (±1
s.d.) is shown as a filled circle at 0 m s–1.