Network analysis of social changes in a captive chimpanzee community following the successful integration of two adult groups

Anne Marijke Schel, Bruce Rawlings, Nicolas Claidiere, Claudia Wilke, Jen Wathan, Jo Richardson, Sophie Pearson, Elizabeth S. Herrelko, Andrew Whiten, Katie Slocombe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Chimpanzees are highly territorial and have the potential to be extremely aggressive toward unfamiliar individuals. In the wild, transfer between groups is almost exclusively completed by nulliparous females, yet in captivity there is often a need to introduce and integrate a range of individuals, including adult males. We describe the process of successfully integrating two groups of chimpanzees, each containing 11 individuals, in the Budongo Trail facility at the Royal Zoological Society of Scotland's Edinburgh Zoo. We use social network analysis to document changes in group dynamics within this population over the 16 months following integration. Aggression rates were low overall and members of the two original groups engaged in significantly fewer aggressive interactions over time. Association and grooming data indicate that relationships between members of the original groups became stronger and more affiliative with time. Despite these positive indicators the association data revealed the continued existence of two distinct subgroups, a year after integration. Our data show that when given complex space and freedom to exhibit natural fissionfusion groupings, in which the chimpanzees choose whom they wish to associate and interact with, the building of strong affiliative relationships with unfamiliar individuals is a very gradual process.

Original languageEnglish
Pages (from-to)254-266
Number of pages13
JournalAmerican Journal of Primatology
Issue number3
Early online date28 Nov 2012
Publication statusPublished - Mar 2013


  • Kibale National Park
  • Primate
  • Pan-troglodytes
  • Behaviour
  • Social relationships
  • Aggression
  • Social network analysis
  • Relocation
  • Chimpanzee
  • Participation
  • Uganda
  • Wild chimpanzees
  • integration
  • Numerical assessment


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