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competition using information among males in fish

Research Project

Project/Area Number 18K06427
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45040:Ecology and environment-related
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2018-2021)

Principal Investigator

Ota Kazutaka  大阪公立大学, 大学院理学研究科, 客員研究員 (50527900)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords代替繁殖戦術 / なわばり雄 / スニーカー / 意思決定 / 繁殖 / 移動生態学 / 捕食 / 探索 / 情報利用 / 学習 / スニーキング / 魚類
Outline of Final Research Achievements

I investigated the reproductive strategies of sneakers and territorial males of the small marine fish, triplefin blenny (Enneapterygius etheostoma). Sneakers intensively observed the behaviour of territorial males and approached the spawning pair using pause-travel locomotion, to start the sneaking rush towards them at a closer position. They repeatedly try sneaking at a spawning site, and movements during a series of sneaking attempts were explained by Brownian locomotion. I also observed that sneakers consecutively used the same locations after succeeding in sneaking (i.e. learning) and changed the location after failing the attempts, which indicates a trial-and-error search pattern. Territorial males did not spend much time scanning the surroundings but attacked when they detected the sneaker's movements, suggesting that they took passive strategies against sneakers. Altogether, how both sneakers and territorial males move to succeed in fertilization influenced each other.

Academic Significance and Societal Importance of the Research Achievements

代替繁殖戦術はダーウィンの時代から知られる現象で、多くの分類群で観察される普遍的な生命現象です。本研究は、スニーカーが繁殖(スニーキング)に用いる行動や意思決定が捕食者や被食者に似るということを見出しました。これは、捕食・被食行動が代替繁殖戦術の進化の前適応になっているという可能性を指摘するものです。なぜ代替繁殖戦術が幅広い分類群で見つかるのか?という問いの一つの答えがこの前適応にあるのかもしれません。このような指摘はこれまで皆無であり、学術的に意義のある成果を得たと考えます。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2018

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] Sneakers take a predation risk to gain sneaking opportunities2020

    • Author(s)
      Ota Kazutaka
    • Journal Title

      Animal Behaviour

      Volume: 167 Pages: 255-262

    • DOI

      10.1016/j.anbehav.2020.07.020

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamics of sibling aggression of a cichlid fish in Lake Tanganyika2019

    • Author(s)
      Shun Satoh, Kazutaka Ota, Satoshi Awata, Masanori Kohda
    • Journal Title

      Hydrobiologia

      Volume: 832 Issue: 1 Pages: 201-213

    • DOI

      10.1007/s10750-018-3768-8

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Do Scales of the Cichlid Altolamprologus compressiceps in Lake Tanganyika Function as a Morphological Defense Against Scale-Eating?2019

    • Author(s)
      Deo C. Mushagalusa, Satoshi Awata, Shun Satoh, Kazutaka Ota, Michio Hori, Muderhwa Nshombo, Masanori Kohda
    • Journal Title

      Zoological Science

      Volume: 36 Issue: 2 Pages: 147-153

    • DOI

      10.2108/zs180130

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Pause and travel: how sneakers approach closer to spawning sites under territorial vigilance2019

    • Author(s)
      Kazutaka Ota
    • Journal Title

      Animal Behaviour

      Volume: 152 Pages: 1-10

    • DOI

      10.1016/j.anbehav.2019.04.001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] ランダム・ウォーキング・スニーカー2019

    • Author(s)
      太田和孝
    • Organizer
      日本動物行動学会 第38回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 薄情な夫?:配偶中,雌より早く逃げる雄2018

    • Author(s)
      太田和孝
    • Organizer
      日本動物行動学会 第37回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] ゼブラガニ雄による宿主(ラッパウニ)の操作:夏の夜,雄は雌の家まで車を走らせる2018

    • Author(s)
      幸田正典,野崎龍彦,神田橋由久,太田和孝,平田智法,安房田智司
    • Organizer
      日本動物行動学会 第37回大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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