Abstract # 13176 Poster # 106:

Scheduled for Thursday, August 9, 2018 06:00 PM-08:00 PM: (Chula Vista ) Poster Presentation


L. A. Young1, S. Moss1, B. Beisner2, M. Bloomsmith1, D. Hannibal2 and B. McCowan2
1Yerkes National Primate Research Center, 954 Gatewood Road NE, Atlanta, GA 30329, USA, 2California National Primate Research Center
     Performing impartial interventions or “policing” (i.e., impartial monitoring and attempted control of conflict among group members by third parties) by resident captive rhesus macaques (Macaca mulatta) may serve a function of combatting group-level instability by regulating fights among group members. Here we investigated whether policers are more likely to intervene in conflicts between female dyads who are related (if they were members of the same matriline), as compared to conflicts between unrelated female dyads. We hypothesized that policers should intervene between related dyads to positively affect group stability more often than would be expected by chance. We recorded the conflict behavior of three rhesus breeding groups (N= 80) for 488 hours across six months. Using event-sampling methods, we recorded bouts of aggression and included all participant dyads. We recorded 201 impartial interventions between female combatants. We used chi-squared tests to analyze whether the observed impartial interventions between related females matched the proportion of related dyads in the groups. Both males and females impartially intervened between conflicting females at rates expected by chance. While these results do not support our hypothesis that predicted greater rates of impartial interventions for related female dyads, there may be other types of dyads that are differentially intervened upon by policers.