Vocal Cues in Cotton-top Tamarin Play Vocalizations1

Authors


  • 1

    Supported by the DFG IM 1/16-1

Freie Universität Berlin, Institut für Verhaltens-biologie, Haderslebener Str. 9, D-1000 Berlin 41

Universität Bielefeld, Fakultät für Biologie, Lehrstuhl für Verhaltensphysiologie, Postfach 8640, D-4800 Bielefeld 1.

Abstract

In cotton-top tamarins (Saguinus o. oedipus) one finds a significantly increased frequency of occurrence of playful wrestling, where the respective vocalizations are characterized by a high degree of instability in the contour of the fundamental frequency. Approximately 20 s after these instable pitched vocalizations, however, frequency of occurrence is significantly reduced. The ethometric methods and those for the detailed analysis of vocalizations are explained in this paper. It is hypothesized that instable pitch expresses some kind of emotion involved in playful interactions.

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