, Volume 25, Issue 3, pp 295–307 | Cite as

Preliminary report on the grouping of mandrills (Mandrillus sphinx) in Cameroon

  • Jiro Hoshino
  • Akio Mori
  • Hiroko Kudo
  • Masao Kawai


A field study of mandrill was carried out from 1979 to 1983 in Cameroon for 27 months. Group size of mandrills ranged from 15 to 95 and composition was estimated by direct and indirect observations. The ratio of group size to one adult male was 13.9, larger than other baboon species except the drill. Solitary males were seen. The mandrill may have two types of groups: one-male and multi-male. The multi-male group was observed to split into subgroups, one of which was sometimes a one-male group. The multi-male subgroup was assumed to be composed of several one-male groups. The home range area of mandrills was estimated to be at least 5 km5 to 28 km2. Their large home range size could be related to their characteristic feeding pattern in the forest.


Range Size Field Study Group Size Home Range Adult Male 
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Copyright information

© Japan Monkey Centre 1984

Authors and Affiliations

  • Jiro Hoshino
    • 1
  • Akio Mori
    • 1
  • Hiroko Kudo
    • 1
  • Masao Kawai
    • 1
  1. 1.Primate Research InstituteKyoto UniversityInuyama, AichiJapan

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