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Population estimation of an endangered horseshoe crab using environmental DNA analysis and remote sensing technique

Research Project

Project/Area Number 18K14482
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 39060:Conservation of biological resources-related
Research InstitutionKumamoto University

Principal Investigator

Koyama Akihiko  熊本大学, 大学院先端科学研究部(工), 特別研究員(SPD・PD・RPD) (50814662)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords干潟 / 砂浜 / カブトガニ / 汽水域 / 保全 / 絶滅危惧種 / 鋏脚類
Outline of Final Research Achievements

In the present study, I attempted to estimate the suitable habitat area of juvenile horseshoe crabs, one of the most endangered species in Japan, by remote sensing technology of aerial photographs, and to estimate the spawning condition of the adults by environmental DNA analysis. By taking aerial photographs of the tidal flats using a small drone, the suitable habitat areas for the juvenile were able to be estimated. Furthermore, environmental DNA analysis of water samples from spawning grounds of the species suggested the possibility of estimating the presence/absence of spawning events of the species or the number of spawning pairs.

Academic Significance and Societal Importance of the Research Achievements

カブトガニは幼体の成育場,および産卵場ともに人為的な改変が顕著であり,それらの保全と再生が求められている.本成果は,従来の調査手法よりも低コストかつ非侵襲的に該当の環境を評価できる点で,将来的にはアセスメント調査方法の改善が期待できる.また,空撮画像を用いた生息適地面積の推定技術は,減少傾向にある干潟性の水産有用種にも応用できる点で,資源保全学や水産学,生態学など複数領域への学術的貢献が期待できる.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] Habitat suitability maps for juvenile tri-spine horseshoe crabs in Japanese intertidal zones: A model approach using unmanned aerial vehicles and the Structure from Motion technique2020

    • Author(s)
      Koyama Akihiko、Hirata Taiga、Kawahara Yuki、Iyooka Hiroki、Kubozono Haruka、Onikura Norio、Itaya Shinji、Minagawa Tomoko
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 12 Pages: e0244494-e0244494

    • DOI

      10.1371/journal.pone.0244494

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] カブトガニ幼体の生息適地となる干潟の推定~福岡県の生息地を対象として~2020

    • Author(s)
      小山彰彦・平田大雅・川原優紀・伊豫岡宏樹・久保園 遥・板谷晋嗣・鬼倉徳雄・皆川朋子
    • Organizer
      応用生態工学会福岡
    • Related Report
      2020 Annual Research Report
  • [Presentation] UAV写真測量技術を用いた干潟生物の生息適地面積の推定2019

    • Author(s)
      小山彰彦・伊豫岡宏樹・平田大雅・川原優紀・久保園 遥・板谷晋嗣・秀野真理・鬼倉徳雄・皆川朋子
    • Organizer
      2019年日本ベントス学会・日本プランクトン学会
    • Related Report
      2019 Research-status Report
  • [Presentation] 津屋崎入江におけるカブトガニの生息適地面積の推定2019

    • Author(s)
      小山彰彦・平田大雅・伊豫岡宏樹・久保園 遥・若林瑞希・鬼倉徳雄・皆川朋子
    • Organizer
      平成31年度日本水産学会春季大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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