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Author Notes:

Correspondence: Zanna Clay; Email: zannaclay@emory.edu

Authors' Contributions: Conceived and designed the experiments: ZC and FDW.

Performed the experiments: ZC.

Analyzed the data: ZC.

Contributed reagents/materials/analysis tools: FDW.

Wrote the paper: ZC and FDW.

Acknowledgments: We thank Pitshou Nsele Kayanga for assistance in data collection.

We are grateful to Claudine André, Fanny Mehl, Dominique Morel, Valery Dhanani and Pierrot Mbonzo for their collaboration and to the Ministry of Research and the Ministry of Environment in the Democratic Republic of Congo for supporting our research (research permit: MIN.RS/SG/004/2009).

We thank all the staff of Lola ya Bonobo for their support, particularly to Stany Mokando, Jean-Claude Nzumbi and Philippe Kunaka.

We thank Brian Hare for his ongoing support and Tim Eppley for valuable practical assistance.

We are grateful to Noah Snyder-Mackler for statistical assistance.

We thank Kim Bard, Philippe Rochat and Malini Suchak for insightful comments; Robert O'Reilly and Nigel Lo for their support in data management, and two anonymous reviewers for their valuable comments.

Disclosures: The authors have declared that no competing interests exist.

Subject:

Research Funding:

Funding for the study has come from the Living Links Center, part of the Yerkes National Primate Research Center, and Emory's College for Arts & Sciences.

This article published with support from Emory Libraries' Open Access Publishing Fund.

Keywords:

  • bonobos
  • apes
  • animal social relationships

Bonobos Respond to Distress in Others: Consolation across the Age Spectrum

Journal Title:

PLoS ONE

Volume:

Volume 8, Number 1

Publisher:

Type of Work:

Article | Final Publisher PDF

Abstract:

How animals respond to conflict provides key insights into the evolution of socio-cognitive and emotional capacities. Evidence from apes has shown that, after social conflicts, bystanders approach victims of aggression to offer stress-alleviating contact behavior, a phenomenon known as consolation. This other-orientated behavior depends on sensitivity to the other’s emotional state, whereby the consoler acts to ameliorate the other’s situation. We examined post-conflict interactions in bonobos (Pan paniscus) to identify the determinants of consolation and reconciliation. Thirty-six semi-free bonobos of all ages were observed at the Lola ya Bonobo Sanctuary, DR Congo, using standardized Post-conflict/Matched Control methods. Across age and sex classes, bonobos consoled victims and reconciled after conflicts using a suite of affiliative and socio-sexual behaviors including embracing, touching, and mounting. Juveniles were more likely to console than adults, challenging the assumption that comfort-giving rests on advanced cognitive mechanisms that emerge onlywith age. Mother-reared individuals were more likely to console than orphans, highlighting the role of rearing in emotional development. Consistent with previous studies, bystanders were more likely to console relatives or closely bonded partners. Effects of kinship, affiliation and rearing were similarly indicated in patterns of reconciliation. Nearby bystanders were significantly more likely to contact victims than more distal ones, and consolation was more likely in non-food contexts than during feeding. The results did not provide convincing evidence that bystander contacts served for self-protection or as substitutes for reconciliation. Overall, results indicate that a suite of social, developmental and contextual factors underlie consolation and reconciliation in bonobos and that a sensitivity to the emotions of others and the ability to provide appropriate consolatory behaviors emerges early in development.

Copyright information:

© 2013 Clay, de Waal

This is an Open Access work distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/).
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