Fig. 1. Representative sections of dive profiles from Ziphius cavirostris
(A) and Mesoplodon densirostris (B). Intervals with regular click
vocalizations are indicated by a thicker trace and times of buzzes are
indicated by small open circles. The depth of occurrence of buzzes heard in
the audio recording during the two dives is shown in the histogram on the
right-hand side of each panel. The bin size of the histogram was 50 m.