Walruses produce intense impulse sounds by clap-induced cavitation during breeding displays

Colleen Reichmuth & Ole Næsbye Larsen
Male walruses produce the longest continuous reproductive displays known in the animal kingdom to convey their individual fitness to potential rivals, and possibly to potential mates. Here we document the ability of a captive walrus to produce intense, rhythmic sounds through a non-vocal pathway involving deliberate, regular collision of the fore flippers. High-speed videography linked to an acoustic onset marker revealed sound production through cavitation, with the acoustic impulse generated by each forceful clap exceeding...
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