, Volume 29, Issue 2, pp 147–161 | Cite as

Association partners of young chimpanzees in the Mahale Mountains National Park, Tanzania

  • Hitoshige Hayaki


Association partners of young chimpanzees at the Mahale Mountains National Park were analyzed. Juvenile and adolescent chimpanzees associated frequently with their mothers, although mother-offspring association decreased as the offspring grew up. Males tended to leave their mothers and associate with adult males, while females remained frequently associating with their mothers in early adolescence. In late adolescence and young adulthood, males usually associated with adult males and cycling adult females. Females may transfer into neighboring unit-groups in this stage. Although an immigrant female tended to be alone when her estrous cycle stopped, she associated with many individuals, in particular with adult males, when she resumed cycling. Some orphans were observed to associate frequently with particular adults. The findings were discussed in relation to the unique characteristics of chimpanzee social system.

Key Words

Pan troglodytes schweinfurthii Social behaviour Association Juvenile Adolescent 


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Copyright information

© Japan Monkey Centre 1988

Authors and Affiliations

  • Hitoshige Hayaki
    • 1
  1. 1.Laboratory of Human Evolution Studies, Faculty of ScienceKyoto UniversityKyotoJapan

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