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Related Experiment Videos

Local variation in Barbary macaque shrill barks

Fischer1, Hammerschmidt, Todt

  • 1Institut für Verhaltensbiologie, Freie Universität Berlin

Animal Behaviour
|December 16, 1998
PubMed
Summary

Barbary macaques (Macaca sylvanus) vocalizations differed between French and German populations. Playback experiments showed macaques discriminated calls from different origins, suggesting vocal plasticity.

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Area of Science:

  • Ethology
  • Bioacoustics
  • Primate Behavior

Background:

  • Vocal communication is crucial for social interactions in many species.
  • Understanding population-specific variations in vocalizations can reveal insights into social structure and adaptation.
  • Barbary macaques (Macaca sylvanus) exhibit complex social behaviors and vocal repertoires.

Purpose of the Study:

  • To investigate acoustic differences in Barbary macaque vocalizations between two distinct populations.
  • To determine the perceptual salience of these acoustic differences through playback experiments.
  • To explore evidence for vocal plasticity in this primate species.

Main Methods:

  • Recording and acoustic analysis of macaque vocalizations in response to a dog in France and Germany.
  • Conducting playback experiments using calls from both local and foreign populations.
  • Analyzing macaque behavioral responses to auditory stimuli.

Main Results:

  • Significant acoustic differences were found in calls between the Rocamadour (France) and Salem (Germany) macaque populations.
  • Macaques showed a slightly, but significantly longer response duration to calls from the other population.
  • While general response patterns were similar, macaques could discriminate between calls from different origins.

Conclusions:

  • Barbary macaques exhibit a degree of vocal plasticity, with subtle but detectable differences in call production between populations.
  • These findings suggest that while call function is primary, macaques can perceive and react to population-specific acoustic variations.
  • The study highlights the potential for localized adaptation in primate vocal communication.

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