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Gender, Age, and Identity in the Isolation Calls of Antillean Manatees (Trichechus manatus manatus)

Abstract

Empirical evidence of individual vocal recognition has been reported for the Amazonian manatee (Trichechus inunguis) and the West Indian manatee (T. manatus). Underwater vocalizations of 15 Antillean manatees (T. m. manatus) were recorded to verify if this subspecies also conveys individual information through their calls. The isolation calls selected for analysis were digitized to measure eight different variables. Individual vocal patterns were analyzed within two age classes (calves and others) and between sexes. Discriminant function analysis for each age class grouped vocalizations by individual, based on variables related to the fundamental frequency and call duration. Female ...

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