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Triadic interactions in captive Barbary macaques (Macaca sylvanus, Linnaeus, 1758): "Agonistic buffering"?

E O Smith1, P G Peffer-Smith2

  • 1Yerkes Regional Primate Research Center, and Department of Anthropology, Emory University, Atlanta, Georgia.

American Journal of Primatology
|March 22, 2020
PubMed
Summary
This summary is machine-generated.

Male Barbary macaques engage in triadic interactions, previously thought to be solely for agonistic buffering. This study found these interactions are context-dependent, not solely explained by aggression inhibition.

Keywords:
Barbary macaquesMacaca sylvanusagonistic bufferingtriadic interactions

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Area of Science:

  • Primate behavior
  • Ethology
  • Social dynamics in mammals

Background:

  • Triadic interactions in male primates have been hypothesized to function as agonistic buffering.
  • Agonistic buffering suggests that these interactions inhibit or modify aggressive behaviors.

Purpose of the Study:

  • To investigate the expression of male-immature triadic interactions in a captive group of Macaca sylvanus.
  • To test the agonistic buffering hypothesis by examining dominance ranks, preceding/following events, and infant presence in triadic encounters.

Main Methods:

  • Observational study of a captive Macaca sylvanus group.
  • Analysis of triadic interactions, focusing on dominance hierarchies.
  • Examination of behavioral sequences before and after triadic interactions.
  • Assessment of infant presence during nonagonistic encounters between males of varying ages.

Main Results:

  • Dominance rank, preceding/following events, and infant presence did not consistently support agonistic buffering as the sole explanation.
  • Triadic interactions showed significant contextual variability in their expression.
  • The presence of an infant influenced nonagonistic encounters between males.

Conclusions:

  • The agonistic buffering hypothesis alone does not fully explain male-immature triadic interactions in Macaca sylvanus.
  • Contextual factors play a crucial role in shaping the expression and function of these social interactions.
  • Further research is needed to understand the multifaceted nature of primate social behavior.