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Ecological studies on food conditions and cognitive ability of Japanese macaques over food

Research Project

Project/Area Number 07640841
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

YAMAGIWA Juichi  Kyoto University, Faculty of Science, Associate Professor, 大学院・理学研究科, 助教授 (60166600)

Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
KeywordsJapanese macaque / cognitive ability ove food / goal-oriented foraging / opportunistic foraging / social recognition / 社会構造 / 生態 / 食物選択 / 活動リズム / 食物分布
Research Abstract

This project aims to clarify how individual Japanese macaque recognize the distribution of foods in the wild and how each individual uses these knowledge as foraging strategies. Field studies have been conducted on the well habituated (non-provisioned) Japanese macaques inhabiting the warm-temperate forest at Yakushima Island, Japan. Data were collected by focal-sampling and scan-sampling methods on activity rhythm, feeding time budget, individual day range, travel route, choice of food patch, duration of visit, and inter-individual relationships in each season (Spring, Summer, Autumn and Winter) . These data were analyzed in relation to phenology of fruit measured by the line-transect methods. The results suggest that the wild Japanese macaques (Macaca fuscata yakui) use two foraging patterns (Goal-oriented and Opportunistic) according to the availability of high-quality foods (fruits or insects) . The goal-oriented foraging is observed frequently during the fruiting period (Autum-winter) , when macaques form a cohesive group, travel long distance and continuously visit the particular fruiting trees. The opportunistic foraging is usually observed during the non-fruiting season (winter-spring) , when they disperse to forage diversed food items individually.Not only food conditions but also sex, age or social status of each individual influence the choice of foraging strategies. Individual foraging patterns reflect life history and social recognition of Japanese macaques. The goal-oriented foraging may have evolved as an optimal strategy between feeding and reproduction, which are strongly influenced by individual social recognition.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 山極 壽一: "ホミニゼーションと共生" 霊長類研究. 13. 117-120 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yamagiwa, J., Izawa, K.& Maruhashi、T.: "Long-term studies on wild Japanese macagues in natural habitats at kinkazan and Yakushima." Primates. 39(3). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yamagiwa, J.& Hill, D.A.: "Intraspecific variations in social organization of Japanese macagues。" Primates. 39(3). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 山極 壽一: "父という余分なもの" 親書館, 269 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yamagiwa, J.: "Hominization and the concept of symbiosis." Primate Research. 13. 117-20 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yamagiwa, J., Izawa, K.& Maruhashi, T.: "Long-term studies on wild Japanese macaques in natural habitats at Kinkazan and Yakushima" Primates. 39(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yamagiwa, J.& Hill, D.A.: "Intraspecific variations in social organization of Japanese macaques." Primates. 39(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 山極寿一: "ホミニゼーションと共生" 霊長類研究. 13. 117-120 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamagiwa,J., Izawa,K. & Maruhashi,T.: "Long-ferm studies on wild Japanese macagues in naturae habitats at kinkazan and yakushima." Primates. 39(3). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamagiwa,J. & Hill,p.: "Intraspecific variations in social organization of Japanese macagues." Primates. 39(3). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 山極寿一: "父という余分なもの" 新書館, 269 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamagiwa,J & Hill,D.A.: "Intraspecific variation in socinl organization of Japanese macaques." Primates. (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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