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Behavioral Ecology and Sociobiology

, Volume 20, Issue 4, pp 257–263 | Cite as

Kin and non-kin interventions in the aggressive disputes of vervet monkeys

  • W. Hunte
  • J. A. Horrocks
Article

Summary

Interventions in aggressive disputes were investigated in a free-living troop of vervets (Cercopithecus aethiops sabaeus) in Barbados. Interventions on behalf of kin were more frequent than on behalf of non-kin. Both types of interventions were more likely when the intervening animal outranked the opponent; presumably because retaliation probability, and hence cost of intervening, is low against low ranking opponents. The number of interventions given on behalf of both kin and non-kin increased with the number of disputes in which they were involved. In contrast to kin interventions, the number of interventions given on behalf of non-kin was correlated with that received by non-kin, suggesting that reciprocation is a necessary component of non-kin interventions. Non-kin interventions were more likely when the recipient outranked the opponent, presumably because reciprocation probability is high. Pairs of non-kin form structured reciprocal relationships based on the proportion of interventions allocated to each other, and most non-kin interventions flowed through these relationships. Males intervened on behalf of non-kin more frequently than did females. The implications of the results for the evolution of kin and reciprocal altruism were discussed.

Keywords

Reciprocal Relationship Vervet Monkey Reciprocal Altruism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • W. Hunte
    • 1
    • 2
  • J. A. Horrocks
    • 1
    • 2
  1. 1.Bellairs Research Institute of McGill UniversitySt. James
  2. 2.Department of BiologyUniversity of the West IndiesBarbados

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