Language
English
Publication Date
1-1-2024
Journal
PLoS One
DOI
10.1371/journal.pone.0307975
PMID
39167568
PMCID
PMC11338468
PubMedCentral® Posted Date
8-21-2024
PubMedCentral® Full Text Version
Post-print
Abstract
In a number of species, including humans, perceived outgroup threat can promote ingroup cohesion. However, the distribution and selection history of this association across species with varied intergroup relations remains unclear. Using a sample of 8 captive groups (N = 43 individuals), we here tested whether bonobos, like chimpanzees, show more affiliative ingroup behaviour following perception of outgroup cues (unfamiliar male long-distance vocalisations). We used comparable methods to our previous study of captive chimpanzees, and found that, although weaker, there was an association for more frequent social grooming in response to the outgroup condition than the control condition, alongside more alert posture and increased self-directed behaviour. This provides preliminary evidence for an ancestral origin to the proximate association between outgroup cues and ingroup cohesion, at least prior to the Pan-Homo split, and suggests the presence of intergroup competition in our last common ancestor.
Keywords
Animals, Pan paniscus, Male, Cues, Female, Social Behavior, Behavior, Animal, Vocalization, Animal
Published Open-Access
yes
Recommended Citation
Brooks, James; van Heijst, Karlijn; Epping, Amanda; et al., "Increased Alertness and Moderate Ingroup Cohesion in Bonobos’ Response to Outgroup Cues" (2024). Faculty, Staff and Students Publications. 8729.
https://digitalcommons.library.tmc.edu/baylor_docs/8729