Intergroup encounters in wild moor macaques (Macaca maurus)

Kyoko Okamoto*, Shuichi Matsumura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We studied intergroup encounters among moor macaques at the Karaenta Nature Reserve, South Sulawesi, Indonesia. Group B has been observed on the basis of individual identification since 1988. We analyzed 85 encounters between members of Group B and members of neighboring groups from September 1990 to November 1998. The average frequency of intergroup encounters was 0.035/hour. Neither the presence of females in estrus nor rainfall had an effect on encounter frequency. Behaviors of moor macaques during intergroup encounters differed from those of Japanese macaques. In moor macaques, no intergroup interactions with body contact were observed during encounters, and females never directed aggresion toward members of different groups. The present study did not confirm the prediction of the model of VAN SCHAIK (1989). Extension of the existing models is required to explain the difference in female dominance styles among macaques by socioecological factors.

Original languageEnglish
Pages (from-to)119-125
Number of pages7
Issue number2
Publication statusPublished - 2002
Externally publishedYes


  • Between-group competition
  • Intergroup encounter
  • Macaca maurus
  • Moor macaques

ASJC Scopus subject areas

  • Animal Science and Zoology


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