The Unitgroup of Wild Bonobos: By Instances of Inter-Unitgroup Encounters
-
- IDANI Gen’ichi
- Great Ape Research Institute, Hayashibara Biochemical Laboratories, Inc.
Bibliographic Information
- Other Title
-
- ボノボの単位集団 : 集団間の遭遇事例から
- ボノボ ノ タンイ シュウダン シュウダン カン ノ ソウグウ ジレイ カラ
Search this article
Abstract
The social structure of unitgroup in wild bonobos (Pan paniscus) at Wamba, D.R. Congo is described. Fifty-nine instances of the inter-unitgroup encounter that were recorded from 1978 to 1991 were analyzed. Of these, the spatial fusion between two groups was observed in over 60%. During such encounters various affinitive behaviors, such as copulation, genito-genital rubbing and grooming e.g. were observed between members of different groups. In the inter-group encounters, females actively formed peaceful relations. Males interacted with members of the other group much less frequently than females. However, appeasement or assurance behaviors such as mounting and rump-rump contact merely occurred between males of different groups. Bonobos of two unitgroups coexisted peacefully in a mixed grouping, which eventually split into the original groups. The inter-group encounters may be an opportunity when young nulliparous females transfer to the other group. It is considered that the unitgroup of bonobos forms a stable structure of 30-50 members, and the fissions and fusions are repeated frequently among neighboring groups. These analyses suggest that bonobos have a regional society above the unitgroup level.
Journal
-
- Primate Research
-
Primate Research 19 (1), 23-31, 2003
Primate Society of Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001205166483840
-
- NII Article ID
- 10011061951
-
- NII Book ID
- AN10080557
-
- ISSN
- 18802117
- 09124047
-
- NDL BIB ID
- 6602319
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed