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Studies on the circadian and circalunar system in the lunar-synchornized spawner

Research Project

Project/Area Number 19H03053
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 40040:Aquatic life science-related
Research InstitutionUniversity of the Ryukyus

Principal Investigator

Takemura Akihiro  琉球大学, 理学部, 教授 (40222103)

Co-Investigator(Kenkyū-buntansha) 武方 宏樹  琉球大学, 戦略的研究プロジェクトセンター, 特命助教 (60814192)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Keywords月周性 / 時計遺伝子 / ヤイトハタ / マスタークロック / 脳下垂体 / 松果体 / ハタ / 視交叉上核
Outline of Research at the Start

本研究課題の核心をなす学術的な「問い」を「月周性を示す魚類の主時計は脳のどこに存在するのか」と「魚類の月周性は主時計によって制御されているのか、それとも主時計から独立して制御されているのか」とし、ハタ科魚類の概日時計の主時計の局在を明らかにするとともに、産卵月相が逆位相になっている近縁ハタ類を人為夜間光条件下で飼育することで、概月性を司るタイマー型砂時計の実体と主時計との関連を明らかにする。

Outline of Final Research Achievements

It is not known how tropical fish with lunar synchrony utilize cues from the moon and transduce them into internal signals. The present study aimed to clarify the location of master clock in the brain of the Malabar grouper, which repeat spawning around the new moon period. Whole mount in-situ hybridization revealed that a day-high and night-low rhythm of Per2 appeared in the pineal gland of 90-h embryos. Under light-dark conditions, expressions of Per2 in the pineal and pituitary glands of immature fish showed daily variation with an increase during daytime. Daily variation of Per2 in the pituitary gland and pineal gland disappeared under constant dark conditions It is concluded that the master clock of this fish exists in the pineal gland.

Academic Significance and Societal Importance of the Research Achievements

哺乳類では主時計が視交叉上核にあることはよく知られているが、魚類では主時計が松果体か視交叉上核にあるかについては議論が分かれる。本研究では、月周性産卵を示すハタ科魚類の主時計の存在部位をあきらかにすることができた。この結果は、海産スズキ目の阪における主時計の存在を示した点で時間生物学的な観点でインパクトがある。また、ハタ科魚類の産卵の時刻合わせを光(もしくは月光)で制御することへの道筋を開いたことから、水産学的観点で応用的な価値も持っている。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (22 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] KIOST(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] KIOST(韓国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 6.Hyeon JY, Byun JH, Kim ES, Heo YS, Fukunaga K, Kim SK, Imamura Kim SJ, Takemura A, Hur SP (2021) Testis development in the Japanese eel is affected by photic signals through melatonin secretion.2021

    • Author(s)
      6.Hyeon JY, Byun JH, Kim ES, Heo YS, Fukunaga K, Kim SK, Imamura Kim SJ, Takemura A, Hur SP
    • Journal Title

      PeerJ

      Volume: 9 Pages: e12289-e12289

    • DOI

      10.7717/peerj.12289

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Food availability alters expression profiles of genes in relation to reproduction and nutrition in the females of tropical damselfish (Chrysiptera cyanea)2020

    • Author(s)
      Mahardini A, Rizki D, Byun JH, Yamauchi C, Takeuchi Y, Takemura A
    • Journal Title

      Jounral of Experimental Zoology

      Volume: 333 Issue: 9 Pages: 619-628

    • DOI

      10.1002/jez.2409

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of long-afterglow-phosphorescent pigments on growth stimulation in spinefoot juveniles2020

    • Author(s)
      Yamauchi C, Takeuchi Y, Takemura A
    • Journal Title

      Aquaculture Studies

      Volume: 20 Issue: 1 Pages: 157-164

    • DOI

      10.4194/2618-6381-v20_1_02

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Daily expression of a clock gene in the brain and pituitary of the Malabar grouper (Epinephelus malabaricus)2019

    • Author(s)
      Yamashina Fumika、Takeuchi Yuki、Fukunaga Kodai、Udagawa Shingo、Tan Ee Suan、Byun Junhwan、Yamauchi Chihiro、Takemura Akihiro
    • Journal Title

      General and Comparative Endocrinology

      Volume: 印刷中 Pages: 9-14

    • DOI

      10.1016/j.ygcen.2019.03.019

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 農水一体型完全陸上養殖の取組み2022

    • Author(s)
      竹村明洋
    • Organizer
      令和3年度アグリ技術シーズセミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 沖縄で開始する農水一体型サステイナブル陸上養殖プロジェクト2022

    • Author(s)
      竹村明洋
    • Organizer
      第6回「農水産業支援技術展」沖縄
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 沖縄県農産物の素材の事業における活用法開発の検討2021

    • Author(s)
      竹村明洋
    • Organizer
      琉球大学・オリオンビール株式会社共同研究報告会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 熱帯性ハタ科魚類カンモンハタにおける月周性産卵機構の解明2021

    • Author(s)
      福永耕大・山科芙美香・山内千裕・武方宏樹・竹内悠記・竹村明洋
    • Organizer
      沖縄生物学会第58回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 人工的な月光条件が与える月周性産卵魚カンモンハタの産卵への影響2021

    • Author(s)
      福永耕大・山科芙美香・山内千裕・竹内悠記・竹村明洋
    • Organizer
      日本動物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 熱帯性魚類の産卵と月光2021

    • Author(s)
      竹村明洋・福永耕大・竹内悠記
    • Organizer
      第28回時間生物学会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 月齢に合わせた魚類産卵リズムと月の光~月夜の時間生物学~.2021

    • Author(s)
      福永耕大・山科芙美香・山内千裕・竹内悠記・竹村明洋
    • Organizer
      第28回時間生物学会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 月光が操るサンゴ礁生物のリズム2021

    • Author(s)
      竹村明洋
    • Organizer
      第42回日本光医学・光生物学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 光が拓く新たな養殖業2021

    • Author(s)
      竹村明洋
    • Organizer
      第5回「農水産業支援技術展」沖縄
    • Related Report
      2020 Annual Research Report
  • [Presentation] JST共創の場プロジェクト2021

    • Author(s)
      竹村明洋
    • Organizer
      琉大SDGsシンポジウム2020 ~研究から広がるSDGs~
    • Related Report
      2020 Annual Research Report
  • [Presentation] 資源循環型共生社会実現に向けた農水一体型サステイナブル陸上養殖プロジェクト2021

    • Author(s)
      竹村明洋
    • Organizer
      サステイナブル陸上養殖技術シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Effect of light and salinity on growth of the malabar grouper Epinephelus malabaricus2020

    • Author(s)
      Zhu, Y., Morita, N., Negishi, R., Maruyama, S., Kaneko, J., Shimabukuro, A., Takemura, A
    • Organizer
      The 6th International Conference on Tropical and Coastal Region Eco Development 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] サンゴ礁から学ぶこと2020

    • Author(s)
      竹村明洋
    • Organizer
      生物リズム若手の集い2020
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] カンモンハタにおける生殖関連遺伝子の月周性変動とメラトニンの月光情報伝達因子としての役割2019

    • Author(s)
      1.福永耕大・山科芙美香・竹村明洋・太田菜月・竹内悠記
    • Organizer
      日本動物学会第90回大会
    • Related Report
      2019 Annual Research Report
  • [Book] スマート水産業入門2022

    • Author(s)
      和田 雅昭
    • Total Pages
      224
    • Publisher
      緑書房
    • ISBN
      9784895317818
    • Related Report
      2021 Annual Research Report
  • [Remarks] http://www.takemura-lab.jp

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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