Fig. 5. Frequency distribution of dive durations for all turtles in relation to calculated aerobic dive limits (cADLs). Approximately 43% of all dives were 5 min long, and 25% of all dives exceeded the lower limit of the cADLs (11.7 min) that we calculated from field metabolic rates for free-swimming, internesting leatherbacks. Only one dive duration exceeded the upper limit (44.3 min) of cADLs.