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  Beyond the group: How food, mates, and group size influence intergroup encounters in wild bonobos (advance online)

Lucchesi, S., Cheng, L., Janmaat, K., Mundry, R., Pisor, A., & Surbeck, M. (2020). Beyond the group: How food, mates, and group size influence intergroup encounters in wild bonobos (advance online). Behavioral Ecology. doi:10.1093/beheco/arz214.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9F62-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-9F63-9
Genre: Journal Article

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 Creators:
Lucchesi, Stefano, Author
Cheng, Leveda, Author
Janmaat, Karline1, 2, Author              
Mundry, Roger2, 3, Author              
Pisor, Anne4, Author              
Surbeck, Martin2, 4, 5, 6, Author              
Affiliations:
1Chimpanzees, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2149636              
2Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497674              
3Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497671              
4Department of Human Behavior Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2173689              
5Endocrinology Laboratory, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2025298              
6Bonobos, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_2149635              

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 Abstract: In social-living animals, interactions between groups are frequently agonistic, but they can also be tolerant and even cooperative. Intergroup tolerance and cooperation are regarded as a crucial step in the formation of highly structured multilevel societies. Behavioral ecological theory suggests that intergroup tolerance and cooperation can emerge either when the costs of hostility outweigh the benefits of exclusive resource access or when both groups gain fitness benefits through their interactions. However, the factors promoting intergroup tolerance are still unclear due to the paucity of data on intergroup interactions in tolerant species. Here, we examine how social and ecological factors affect the onset and termination of intercommunity encounters in two neighboring communities of wild bonobos, a species exhibiting flexible patterns of intergroup interactions, at Kokolopori Bonobo Reserve, Democratic Republic of the Congo. We recorded the timing and location of intercommunity encounters and measured fruit abundance and distribution, groups’ social characteristics, and space-use dynamics over a 19-month period. We found that intercommunity tolerance was facilitated by a decrease in feeding competition, with high fruit abundance increasing the likelihood of communities to encounter, and high clumpiness of fruit patches increasing the probability to terminate encounters likely due to increased contest. In addition, the possibility for extra-community mating, as well as the potential benefits of more efficient foraging in less familiar areas, reduced the probability that the communities terminated encounters. By investigating the factors involved in shaping relationships across groups, this study contributes to our understanding of how animal sociality can extend beyond the group level.

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Language(s): eng - English
 Dates: 2020-01-07
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/beheco/arz214
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Title: Behavioral Ecology
  Alternative Title : Behav Ecol
Source Genre: Journal
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Pages: 14 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISBN: 1045-2249