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2006 Fiscal Year Final Research Report Summary

Coexistence and co-evolution of the great apes and humans in the African tropical forest

Research Project

Project/Area Number 16255008
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Anthropology
Research InstitutionKyoto University

Principal Investigator

YAMAGIWA Juichi  Kyoto University, Department of Zoology, Professor (60166600)

Co-Investigator(Kenkyū-buntansha) ICHIKAWA Mitsuo  Kyoto University, Graduate School of Asian and African Area Studies, Professor (50115789)
SUZUKI Sigeru  Ryukoku University, Faculty of Intercurtural Studies, Associate Professor (80324606)
YUMOTO Takakazu  Kyoto University, Professor (70192804)
SAWADA Masato  Kyoto Seika University, Faculty of Humanities, Professor (30211949)
TAKENOSHITA Yuji  Japan Monkey Centre, Research Fellow (40390778)
Project Period (FY) 2004 – 2006
KeywordsGorilla / Chimpanzee / Hunter-gatherer / Sympatry / Food / Ranging / Conflict / Sociality
Research Abstract

RESEARCH RESULTS
Our project aims to clarify the coexistence and social evolution of the great apes (gorillas and chimpanzees) and humans (hunter-gatherers), through comparative analysis of environmental factors influencing their sympatry in the tropical forests where the ancestral hominin evolved. We have monitored seasonal and annual changes in climate and food availability and conducted surveys on the apes and humans in the two study sites (Moukalaba-Doudou National Park, Gabon and Kahuzi-Biega National Park, DRC), both of which are regarded as refuge forests during the past glacial periods. Data on utilization of forests and ranging patterns of habituated or semi-habituated groups of gorillas and chimpanzees were collected and analyzed in relation to their diet and food conditions. Our results suggest that gorillas, chimpanzees and humans have developed different foraging strategies while keeping the similar food preference. Gorillas are distributed in different habitats at the simi … More lar density. Their diet is varied drastically with food availability, but range size is constant across habitats. By contrast, chimpanzees tend to change association patterns and range size according to fruit availability. Hunter-gatherers use the central foraging strategies based on food sharing system. Our recent findings suggest that the foraging strategy of gorillas inhabiting the lowland tropical forest is intermediate between chimpanzees and gorillas inhabiting the montane forest. They tend to reuse the particular areas for feeding and nesting possibly due to high diversity and abundance of fruits as frugivorous chimpanzees, while they periodically shift their range as folivorous gorillas. These observations strongly suggest that inter-and intra-specific conflicts on resources constitute major factors promoting hominin social evolution under the sympatric conditions. Based on this view point, we will start a new project entitled "Evolutionary anthropology on conflicts and resolution of the great apes and humans" as a Grand-in-Aid for Scientific Research (S) from 2007. Less

  • Research Products

    (19 results)

All 2007 2006 2005 2004 Other

All Journal Article (17 results) Book (2 results)

  • [Journal Article] Bed and bed-site reuse by western lowland gorillas(Gorilla gorilla gorilla)in moukalaba-Doudou National Park,Gabon2006

    • Author(s)
      Iwata, Y., Ando c.
    • Journal Title

      Primates 48

      Pages: 77-80

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Diet and seasonal changes in sympatric gorillas and chimpanzees at Kahuzi-Biega National Park2006

    • Author(s)
      Yamagiwa, J., Basabose, A. K.
    • Journal Title

      Primates 47(1)

      Pages: 74-90

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Sedentary lifestyle and social relationship among Babongo in Southern Gabon2006

    • Author(s)
      Matsuura, N
    • Journal Title

      African Study Monographs, Supplementary Issue 33

      Pages: 71-93

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effects of fruit scarcity on foraging strategies of sympatric gorillas and chimpanzees2006

    • Author(s)
      Yamagiwa, J., Basabose, A.K.
    • Journal Title

      Feeding Ecology in Apes and Other Primates:Ecological, Physiological and Behavioural Aspects, Hohmann, G., Robbins, M.M.and Boesch, C.'.), Cambridge University Press

      Pages: 73-96

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] コンゴ東北部イトゥリ地方における民族間対立と土地問題2006

    • Author(s)
      澤田 昌人
    • Journal Title

      立命館言語文化研究 17巻3号

      Pages: 55-67

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Bed and bed-site reuse by western lowland gorillas(Gorilla gorilla gorilla) in moukalaba-Doudou National Park, Gabon2006

    • Author(s)
      Iwata, Y., Ando, C.
    • Journal Title

      Primates 48

      Pages: 77-80

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Sedentary lifestyle and social relationship mong Babongo in Southern Gabon.2006

    • Author(s)
      Matsuura, N.
    • Journal Title

      African Study Monographs, Supplementary Issue 33

      Pages: 71-93

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effects of fruit scarcity on foraging strategies of sympatric gorillas and chimpanzees.2006

    • Author(s)
      Yamagiwa, J., Basabose, A. K.
    • Journal Title

      Feeding Ecology in Apes and Other Primates : Ecological, Physiological and Behavioural Aspects, Hohmann, G., Robbins, M. M. and Boesch, C., Cambridge University Press, Cambridge

      Pages: 73-96

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Diet of Grauer's gorillas in the montane forest of Kahuzi,Democratic Republic of Congo2005

    • Author(s)
      Yamagiwa, J., Basabose, AK, Kaleme, K., Yumoto, T
    • Journal Title

      International Journal of Primatology 26(6)

      Pages: 1345-1373

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Species and sex identification of western lowland gorillas(Gorilla gorilla gorilla),eastern lowland gorillas(Gorilla beringei graueri)and humans2005

    • Author(s)
      Matsubara M, Basabose AK, Omari I, Kaleme K, Kizungu B, Sikubwabo K, Kahindo M, Yamagiwa J, Takenaka O
    • Journal Title

      Primates 46

      Pages: 199-202

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Food Sharing and Ownership among the Central African Hunter-gatherers:An Evolutionary Perspective2005

    • Author(s)
      Ichikawa, M.
    • Journal Title

      Property and Equality, Widlok, T.and W.Tadasse(eds.), Oxford:Berghahn

      Pages: 151-164

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Diet of Grauer's gorillas in the montane forest of Kahuzi, Democratic Republic of Congo.2005

    • Author(s)
      Yamagiwa J, Basabose A. K, Kaleme K, Yumoto T.
    • Journal Title

      International Journal of Primatology 26(6)

      Pages: 1345-1373

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Species and sex identification of western lowland gorillas(Gorilla gorilla gorilla), eastern lowland gorillas(Gorilla beringei Rrauen) and humans.2005

    • Author(s)
      Matsubara M, Basabose A K, Oman I, Kaleme K, Kizungu B, Sikubwabo K, Kahindo M, Yamagiwa J, Takenaka O
    • Journal Title

      Primates 46

      Pages: 199-202

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Food Sharing and Ownership among the Central African Huntergathniers : An Evolutionary Perspective.2005

    • Author(s)
      Ichikawa, M.
    • Journal Title

      Property and Equality, Widlok, T. and W. Tadasse(eds.), Oxford : Berghahn

      Pages: 151-164

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Diet and foraging of the great apes:ecological constraints on their social organizations and implications for their divergence2004

    • Author(s)
      Yamagiwa, J.
    • Journal Title

      The Evolution of Thought:Evolutionary Origins of Great Ape Intelligence, A.E.Russon&D.R.Begun(eds.), Cambridge University Press

      Pages: 210-233

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Diet and foraging of the great apes : ecological constraints on their social organizations and implications for their divergence.2004

    • Author(s)
      Yamagiwa, J.
    • Journal Title

      The Evolution of Thought : Evolutionary Origins of Great Ape Intelligence, A. E. Russon & D. R. Begun(eds.), Cambridge University Press, Cambridge

      Pages: 210-233

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The ethnic conflict and land issues in the Ituri district in North-Eastern Democratic Republic of Congo.

    • Author(s)
      Sawada, M.
    • Journal Title

      Language and Culture Studies Ritsumeikan University 17(3)

      Pages: 55-67

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] ヒトはどのようにしてつくられたか2007

    • Author(s)
      山極 寿一
    • Total Pages
      232
    • Publisher
      岩波書店
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] How human has been created?2007

    • Author(s)
      Yamagiwa, J.
    • Publisher
      Iwanami Shoten
    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2010-02-04  

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