Detection of a unique calling pattern during the respiratory cycle of blue whale pairs

Abstract: Although blue whales are known for their long (10–20 s) low-frequency (<20 Hz) vocalizations that occur in regularly patterned series, in coastal waters they produce short (1–4 s) higher-frequency (30–150 Hz) unpatterned calls just as often. Paul Thompson was among the group of scientists who first attributed these short calls to blue whales. They found the majority of these...

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