Figure 2. Example of agonistic sounds produced by Amphiprion frenatus during interactions.

A) Oscillogram (top) and spectrogram (bottom) of submissive sounds produced by subordinate during head shaking movements. B) Oscillogram (top) and spectrogram (bottom) of aggressive sounds produced by dominant while displaying charge and chase. Note the differences in (1) pulse duration and (2) pulse period. The acoustic variable measured in (3) represents the sound duration in the case of submissive sounds, and the train duration in the case of aggressive sounds. The colour scale corresponds to the intensity associated with the different frequencies.