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Advantage of trichromatic color vision under dim-light condition

Research Project

Project/Area Number 16K21132
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Physical anthropology
Experimental psychology
Research InstitutionThe University of Tokyo (2018-2019)
Kyoto University (2016-2017)

Principal Investigator

Nishikawa Mari  東京大学, 大学院新領域創成科学研究科, 特別研究員 (50771680)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords色覚進化 / 霊長類 / 広鼻猿類 / 昼行性 / オプシン遺伝子 / 薄明視 / 採食行動 / 果実食 / 色覚 / 3色型色覚 / 果実 / 採食効率 / 色覚多型 / 遺伝子 / 広鼻猿 / 薄明環境 / 新世界ザル
Outline of Final Research Achievements

This study examined the adaptive significance of trichromatic color vision in primates in fruit foraging under dim-light conditions. The study was conducted on wild white-faced capuchin monkeys in Sector Santa Rosa, Area de Conservacion Guanacaste, Costs Rica. We observed and recorded foraging behavior of monkeys under dim-light conditions (before and after of sunrise and sunset). We calculated the foraging efficiency of each color vision. We compared the foraging efficiency between trichromatic indivisuals and dichromatic individuals divided by the color of fruits eaten by monkeys (conspicuous and cryptic). I am currently in the process of conducting a detailed data analysis.

Academic Significance and Societal Importance of the Research Achievements

哺乳類の色覚は2色型色覚が一般的であるが、我々ヒトを含めた霊長類は進化の過程で3色型色覚を獲得した稀有な存在である。3色型色覚がどのような状況で適応的であるのかはっきりしていないが、近年、原始的な霊長類である曲鼻猿類における色覚の系統解析によって、霊長類の3色型色覚は、進化の過程で活動の場を日中へ移行する以前に既に獲得されていた可能性が指摘された。本研究が着目した薄明環境での3色型色覚の優位性の検証は、霊長類の3色型色覚の獲得が必ずしも日中の明るい環境光への適応ではない可能性を検討するうえで重要な知見を与える。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2017 2016

All Presentation (5 results) (of which Int'l Joint Research: 1 results) Book (2 results)

  • [Presentation] Test of dichromat advantage in detection of camouflaged predator2020

    • Author(s)
      Mari Nishikawa, Chigusa Tanaka, Yumi Tsujiuchi, Takashi Funahashi, Amanda Melin, Shoji Kawamura
    • Organizer
      第67回日本生態学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Advantage of trichromatic color vision under long-distance detection2019

    • Author(s)
      Mari Nishikawa, Takashi Hayakawa, Akinori Dosho, Ryosuke Ichihara, Kei Nemoto, Amanda Melin, Shoji Kawamura
    • Organizer
      第35日本霊長類学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Genetic polymorhism of color vision type of Bolivian squirrel monkeys in Japan Monkey Centre2019

    • Author(s)
      Mari Nishikawa, Takashi Hayakawa, Akinori Dosho, Ryosuke Ichihara, Kei Nemoto, Aamanda Melin, Shoji Kawamura
    • Organizer
      第63回プリマーテス研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] Home range shifts and changes in group size wild Japanese macaques of Yakushima Island, Japan2017

    • Author(s)
      Mari Nishikawa
    • Organizer
      Behaviour 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 屋久島のニホンザルの群れの行動圏の変化と個体数の減少2016

    • Author(s)
      西川真理
    • Organizer
      日本霊長類学会
    • Place of Presentation
      鹿児島市
    • Year and Date
      2016-07-15
    • Related Report
      2016 Research-status Report
  • [Book] 日本のサル2017

    • Author(s)
      西川真理
    • Total Pages
      336
    • Publisher
      東京大学出版会
    • ISBN
      9784130602334
    • Related Report
      2017 Research-status Report
  • [Book] 日本のサル 哺乳類学としてのニホンザル研究2017

    • Author(s)
      西川真理
    • Total Pages
      300
    • Publisher
      東京大学出版会
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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