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Figure 4


Fig. 4. Kinematics of foraging dives. Swimming strokes (acceleration), speed and pitch angle are shown for a foraging dive (whale MnA). Foraging dives consisted of a gliding descent and an ascent powered by steady swimming. Lunges at the bottom of each dive are marked by speed maxima and bouts of fluking. Each lunge is identified by a red arrow and highlights how the deceleration phase of each lunge occurs during continued swimming, which is a defining characteristic of a lunge. The vertical blue line marks a speed maximum that is not considered a lunge because it is associated with the tag breaking the sea surface. Also note how each lunge occurs when the body is approximately horizontal (dashed line).





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