The Silent Bared-Teeth Face and the Crest-Raise of the Mandrill (Mandrillus sphinx): a Contextual Analysis of Signal Function

Abstract

The functions of two visual signals of the mandrill [silent bared-teeth face (SBTF) and crest-raise (CR)] were investigated by quantifying the probability of each signal occurring across a set of distinct contexts. The motivation for the investigation was twofold: (1) SBTF had been interpreted in diverse and sometimes contradictory ways, and (2) CR had been… (More)

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