FOOD SEASONALITY AND SOCIOECOLOGY IN PAN: ARE WEST AFRICAN CHIMPANZEES ANOTHER BONOBO?

• YAMAKOSHI Gen

  Graduate School of Asian and African Area Studies, Kyoto University, Japan

抄録

Comparative feeding ecology of African apes has recently been intensively investigated principally for testing the THV (terrestrial herbaceous vegetation) hypothesis. The hypothesis argues that peaceful behavioral nature observed in bonobo (Pan paniscus) compared to chimpanzee (P. troglodytes) is derived from presence of suffi cient THV as fallback foods during lean periods, resulting from habitat segregation from more herbivorous gorillas. There was some supportive evidence for the hypothesis such as presence of feeding competition for fi brous foods between chimpanzees and gorillas in sympatry. However, many cast doubt on the function of THV to maintain female cohesiveness. Overall, the ecological and social causality theorized in the THV hypothesis appears sound, but THV itself unlikely plays a major role, although critical data, bonobo ecology in particular, are still missing. Observed behavioral variation among chimpanzee subspecies suggests that West African chimpanzees are behaviorally more peaceful than East African subspecies. Intensive comparison of some socio-ecological parameters between Bossou and Kibale chimpanzees supported this idea. Data suggested that, also in this case, THV consumption is unlikely a key factor. Because West African chimpanzees, like bonobos, have probably been segregated from gorilla habitat for considerable amount of time in their evolutionary history, collective infl uence from coexisting with gorillas, not a competition over a single food source, must be responsible for socio-ecological differentiation observed among bonobo, Western chimpanzees, and Eastern chimpanzees.

収録刊行物

• African Study Monographs

  African Study Monographs 25 (1), 45-60, 2004-03

  京都大学アフリカ地域研究資料センター

キーワード

• THV
• Gorilla
• Feeding ecology
• Fallback foods
• Violence

詳細情報

• CRID: 1390853649764873856
• NII論文ID: 110001018699
• NII書誌ID: AA10626444
• DOI: 10.14989/68227
• HANDLE: 2433/68227
• ISSN: 02851601
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
  • KAKEN
  • Crossref
• 抄録ライセンスフラグ: 使用可