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The function of Barbary macaque copulation calls

S Semple1

  • 1School of Biological Sciences, University of Sussex, Falmer, Brighton, UK.

Proceedings. Biological Sciences
|April 2, 1998
PubMed
Summary
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Female Barbary macaques

Area of Science:

  • Ethology
  • Behavioral Ecology
  • Primatology

Background:

  • Female animals often produce vocalizations during mating.
  • Copulation calls may incite male-male competition, influencing mating success.
  • Two hypotheses exist: indirect mate choice and sperm competition.

Purpose of the Study:

  • To experimentally test the function of female Barbary macaque copulation calls.
  • To investigate if calls mediate indirect mate choice or sperm competition.
  • To determine the role of calls in male reproductive behavior.

Main Methods:

  • Playback experiments using female Barbary macaque copulation calls.
  • Observation of male approach behavior to calls in different social contexts.
  • Measurement of mating intervals following call playback versus control stimuli.

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Main Results:

  • Male rank influenced approach behavior when pairs of males were present.
  • Higher-ranking males approached calls more readily in pairs.
  • Females were mated significantly sooner after copulation call playback.

Conclusions:

  • Female Barbary macaque copulation calls influence male reproductive behavior.
  • Calls facilitate both indirect mate choice and sperm competition.
  • These vocalizations offer fitness benefits by modulating male competition.