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Evolutionary genetic basis of divergence in androgen-dependent male mating strategy of threespine stickleback

Research Project

Project/Area Number 15K07195
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biodiversity/Systematics
Research InstitutionFukui Prefectural University

Principal Investigator

Kokita Tomoyuki  福井県立大学, 海洋生物資源学部, 准教授 (60372835)

Project Period (FY) 2015-10-21 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords生態ゲノミクス / 行動生態学 / 配偶戦略 / 雄性ホルモン / 魚類 / アンドロゲン / 繁殖戦略 / 相関進化 / 遺伝基盤 / 適応進化 / 繁殖コスト / 行動生態 / 進化遺伝 / 進化内分泌 / ゲノム編集 / 繁殖行動 / ホルモン合成能
Outline of Final Research Achievements

Sex steroid hormone is an important mediator of many social and sexual behaviors in vertebrates and its circulating levels can influence fitness via hormone-mediated phenotypes. The previous studies strongly suggested that male androgen levels are under strong direct selection, and that males with high levels of androgen enjoy a selective advantage in terms of increased reproductive success. To address this prediction, I used natural variation in androgen-mediated traits between different ecotype populations of the Japanese threespined stickleback as a model system. In this study, I elucidated that there is adaptive population divergence of male androgen production in relation to mating system in nature and the presence of androgen-dependent reproductive cost may constrain evolution of high androgen levels and drive evolutionary divergence in androgen levels in relation to breeding system.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (6 results)

All 2018 2017 2015

All Journal Article (2 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] 「魚類における適応・種分化の進化遺伝機構:研究最前線と今後の展望」の開催報告2015

    • Author(s)
      小北智之・渡辺勝敏
    • Journal Title

      魚類学雑誌

      Volume: 62 Pages: 93-96

    • NAID

      120006826641

    • Related Report
      2015 Research-status Report
  • [Journal Article] 8th International Conference on Stickleback Behavior and Evolution参加記2015

    • Author(s)
      小北智之
    • Journal Title

      魚類学雑誌

      Volume: 62 Pages: 206-208

    • Related Report
      2015 Research-status Report
  • [Presentation] Ecotypic variation in androgen-dependent reproductive cost of male threespine stickleback inferred from telomere dynamics2018

    • Author(s)
      Kana Harada, Seiichi Mori, Tomoyuki Kokita
    • Organizer
      9th International Conference on Stickleback Behavior and Evolution
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 生活史戦略が異なるハリヨ集団間におけるテロメア動態の変異2017

    • Author(s)
      原田佳奈,森誠一,小北智之
    • Organizer
      2017年度日本魚類学会年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 雄性ホルモンレベルと攻撃性における雌雄間の相関した進化2017

    • Author(s)
      小北智之・武田 稔・森 誠一
    • Organizer
      日本生態学会第64回全国大会
    • Place of Presentation
      早稲田大学(東京都)
    • Related Report
      2016 Research-status Report
  • [Presentation] 繁殖システムに依存した性ホルモンレベルの適応進化2015

    • Author(s)
      小北智之・石川麻乃・北野 潤・森 誠一
    • Organizer
      2015年度日本動物行動学会大会
    • Place of Presentation
      東京海洋大学、東京
    • Year and Date
      2015-11-21
    • Related Report
      2015 Research-status Report

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Published: 2015-10-21   Modified: 2019-03-29  

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