Fig. 2. Changes in plasma lactate concentration (A), recovery oxygen consumed (B) and post-dive oxygen consumption rate (C) in relation to dive duration for nine adult Weddell seals. Measurements were taken during the recovery period immediately following each dive. Points represent individual dives for an animal. The dashed vertical line denotes the change from aerobic to anaerobic dives, as indicated by the increase in plasma [lactate] above resting levels. Equations for statistical relationships are provided in the text.