Click production during breathing in a sperm whale (Physeter macrocephalus)
Left: Sperm whale click, with the pulses labelled p0, p1, p2, p3. Right: The anatomy of the sperm whale head and suggested path of the p0 and p1 pulses. , naris, , air sac, air sac, , naris, , muzzle, -nasalis muscle layer, -labialis muscle layer, muscles, naris, , sac, and at the entrance of the bony naris. Modified after Madsen et al. (2002b) and Møhl et al. (2003a), with permission from the Journal of Experimental Biology and the Journal of the Acoustical Society of America.
Interclick intervals of clicks recorded right before until right after seven breaths (labelled B1–B7) made by a sperm whale. Breaths occur at the value of 0 for each sequence.
Dissection of an adult male sperm whale showing the passage between the blowhole (Bl) and the monkey lips (Mo) through the distal air sac. P denotes posterior direction, D denotes dorsal direction.
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