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Establishing a method for estimating species numbers for each taxon in interstitial environment

Research Project

Project/Area Number 20K06780
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45030:Biodiversity and systematics-related
Research InstitutionHokkaido University

Principal Investigator

Kajihara Hiroshi  北海道大学, 理学研究院, 教授 (30360895)

Co-Investigator(Kenkyū-buntansha) 嶋田 大輔  日本大学, 経済学部, 専任講師 (30768445)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords扁形動物 / 紐形動物 / 間隙動物 / 間隙性 / 間隙性動物 / 線形動物 / 原順列類 / 分類学
Outline of Research at the Start

・間隙(かんげき)性動物は分散能力が低いと考えられているが、何らかの手段で長距離移動した系統的痕跡が見つかっており、それを説明する新たな学説の登場が待たれている。
・間隙性動物の分布に関する知見の不足を解消するため、日本沿岸の砂浜にはどんな間隙性動物が何種生息しているのかを、環境DNAメタバーコーディングの手法によって推定できるような技術体系を構築する。
・間隙性動物の分布様式を説明する思考の枠組みの変更(パラダイム・シフト)をもたらすような歴史生物地理学的研究を行うための基盤として、確実に同定された標本に由来する大量の塩基配列情報を複数の分類群にわたって生成・整備する。

Outline of Final Research Achievements

During this research period, two species of turbellarians and six species of ribbon worms were described as new. Mitochondrial genomes had been determined for turbellarians representing five of the 11 major free-living platyhelminth subtaxa. In this study, we were able to determine the mitochondrial genome for the first time for a representative of Proseriata, one of the remaining six major turbellarian subtaxa.

Academic Significance and Societal Importance of the Research Achievements

いわゆるバーコード配列を伴って2種の扁形動物と6種の紐形動物を新種として公表したことにより、日本及びその周辺に生息する間隙動物の種多様性に関する知見が増進し、塩基配列情報に基づいた多様性評価法の進展に寄与することが出来た。世界で初めて原順列類のミトコンドリアゲノム塩基配列を決定したことで、扁形動物門のミトコンドリアゲノム進化に関する知見の増大に寄与することが出来た。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2024 2023 2022

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

  • [Journal Article] Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific2024

    • Author(s)
      Abato Jamael C.、Chernyshev Alexei V.、Hookabe Natsumi、Tsuyuki Aoi、Kaushik Gauri、Kajihara Hiroshi
    • Journal Title

      Frontiers in Ecology and Evolution

      Volume: 12

    • DOI

      10.3389/fevo.2024.1356316

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Occurrence of an unidentified harrimaniid acorn worm in the genus Stereobalanus (Hemichordata: Enteropneusta) from the Japan Trench hadal zone2023

    • Author(s)
      Kajihara Hiroshi、Abato Jamael、Matsushita Maho
    • Journal Title

      Deep Sea Research Part I: Oceanographic Research Papers

      Volume: 198 Pages: 104075-104075

    • DOI

      10.1016/j.dsr.2023.104075

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] New Locality for the Deep-Sea Acorn Worm Quatuoralisia malakhovi (Hemichordata: Enteropneusta)2023

    • Author(s)
      Kajihara Hiroshi、Abato Jamael、Matsushita Maho
    • Journal Title

      Russian Journal of Marine Biology

      Volume: 49 Issue: 6 Pages: 522-527

    • DOI

      10.1134/s1063074023060111

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Diversity of interstitial nemerteans of the genus Ototyphlonemertes (Nemertea: Monostilifera: Ototyphlonemertidae) in the South China Sea, with a comment on the distribution pattern of the genus2022

    • Author(s)
      Liu Hai-Long、Kajihara Hiroshi、Sun Shi-Chun
    • Journal Title

      Frontiers in Marine Science

      Volume: 9 Pages: 1-24

    • DOI

      10.3389/fmars.2022.1009536

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 日本海溝の超深海帯から得られたギボシムシ(半索動物門腸鰓綱)の断片の正体2023

    • Author(s)
      柁原 宏・ジャマエル アバト・松下真穂
    • Organizer
      日本動物分類学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Systematic studies on ribbon worms (phylum Nemertea)2022

    • Author(s)
      Hiroshi Kajihara
    • Organizer
      39th Symposium on Systematic Biologists of the Philippines
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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