Sex differences in behavioural responses of wild Barbary macaques to simulated out-group threat

Majolo, Bonaventura and Campbell, Elizabeth and Elfassi Fihri, Selma and Tkaczynski, Patrick J. and Radford, Andrew N. (2018) Sex differences in behavioural responses of wild Barbary macaques to simulated out-group threat. [Dataset]

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In social species, groups often come into conflict with conspecific outsiders over resources, with potential behavioural and fitness consequences. There has been little experimental testing of how out-group contests, and their threat, affect within-group behaviour and whether all group members respond similarly. We experimentally simulated an out-group threat (using playbacks of aggressive calls) to examine the responses of wild Barbary macaques (Macaca sylvanus) of different sex and dominance status. We found sex-specific, but not dominance-specific, differences in both the initial response and in subsequent changes in intra-group social behaviour. Males, but not females, increased their immediate vigilance in response to the simulated threat. In the aftermath, it was females who exhibited an increase in affiliation, particular with other female groupmates. Simulated outgroup threat did not increase affiliation in males nor within-group aggression in either sex. Our study shows that there is significant inter-individual variation in behavioural responses to out-group threats that may be linked to the different costs and benefits of between-group contest competition for group members.

Keywords:affiliation, aggression, between-group conflict, collective action problem, competition, grooming
Subjects:C Biological Sciences > C800 Psychology
Divisions:College of Social Science > School of Psychology
ID Code:31713
Deposited On:17 Apr 2018 12:06

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