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Elucidation of food resources for the conservation of endangered freshwater bivalves (Unionoida)

Research Project

Project/Area Number 25290084
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Conservation of biological resources
Research InstitutionCenter for Environmental Science in Saitama

Principal Investigator

Tanaka Hitoshi  埼玉県環境科学国際センター, 水環境担当, 担当部長 (40415378)

Co-Investigator(Kenkyū-buntansha) 田中 大祐  富山大学, 理工学研究部(理学), 教授 (40360804)
酒徳 昭宏  富山大学, 理工学研究部(理学), 助教 (20713142)
Co-Investigator(Renkei-kenkyūsha) NISHIMURA OSAMU  東北大学, 大学院工学研究科, 教授 (80208214)
FUJIBAYASHI MEGUMU  秋田県立大学, 生物資源科学部, 助教 (70552397)
KAWACHI MASABOBU  国立環境研究所, 生物・生態系環境研究センター, 室長 (80311322)
Research Collaborator NISHIO MASAKI  氷見市教育委員会, 主任学芸員
Project Period (FY) 2013-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywordsイシガイ類 / 希少淡水二枚貝 / 餌資源 / 遺伝子解析 / 必須脂肪酸 / 生息環境 / タナゴ類 / 人工飼料 / イシガイ類保護 / 餌源 / 市販藻類 / 生態系修復・整備 / 淡水二枚貝イシガイ類 / 珪藻 / 緑藻 / PCR-DGGE / 真核生物遺伝子 / 希少種保護 / イシガイ科二枚貝 / 餌藻類培養 / PCR-DGGE / 生息河川水質 / 藻類 / 細菌 / クロロフィルa
Outline of Final Research Achievements

Freshwater bivalves (Unionoida) help maintain river ecosystems by acting as host shells for Japanese bitterlings and purifying water by removing suspended matter. Habitats and populations of bivalves have decreased throughout Japan, making protection measures urgent.
Surveys of rivers with high densities of Unio douglasiae nipponensis showed that the microalgae they feed on were in sufficient supply during the warm water period, which marks the bivalve growing season. Analysis of essential fatty acids, that cannot be synthesized in the body and originate from the natural diet, showed that U. douglasiae nipponensis assimilate green algae and diatoms as well as bacteria. Based on these results, we conducted feeding experiments on U. douglasiae nipponensis using cultured and commercial algae, and achieved successful long-term breeding.

Report

(5 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (10 results)

All 2017 2016 2015 2014 2013

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (9 results)

  • [Journal Article] EVALUATION OF FOOD SOURCES ASSIMILATED BY UNIONID MUSSELS USING FATTY2016

    • Author(s)
      MEGUMU FUJIBAYASHI, OSAMU NISHIMURA and HITOSHI TANAKA
    • Journal Title

      Journal of Shellfish Research

      Volume: 35 Issue: 4 Pages: 857-863

    • DOI

      10.2983/035.035.0414

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 実験水槽を用いた市販藻類による淡水二枚貝イシガイの飼育系確立の検討2017

    • Author(s)
      田中仁志, 田中大祐, 酒徳昭宏, 西尾正輝, 河地正伸, 藤林恵, 西村修
    • Organizer
      日本水環境学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2017-03-09
    • Related Report
      2016 Annual Research Report
  • [Presentation] 淡水二枚貝イシガイの保護を目的とした実験水槽を用いた培養藻類の給餌実験2016

    • Author(s)
      田中仁志ほか
    • Organizer
      第50回日本水環境学会年会
    • Place of Presentation
      アスティとくしま(徳島市)
    • Year and Date
      2016-03-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] イタセンパラとイシガイ科二枚貝が生息する富山県下の小河川における真核微生物群集構造の解析2016

    • Author(s)
      田中大祐ほか
    • Organizer
      第50回日本水環境学会年会
    • Place of Presentation
      アスティとくしま(徳島市)
    • Year and Date
      2016-03-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 脂肪酸バイオマーカーを用いたイシガイ科二枚貝類の同化餌源の推定2015

    • Author(s)
      藤林恵、西村修、西尾正輝、田中仁志
    • Organizer
      日本陸水学会第80回大会
    • Place of Presentation
      北海道大学函館キャンパス
    • Year and Date
      2015-09-28
    • Related Report
      2015 Annual Research Report
  • [Presentation] 富山県氷見市におけるイタセンパラとイシガイ類が生息する小河川の水質調査2015

    • Author(s)
      田中仁志
    • Organizer
      日本水環境学会
    • Place of Presentation
      金沢大学(金沢市)
    • Year and Date
      2015-03-18 – 2015-03-19
    • Related Report
      2014 Annual Research Report
  • [Presentation] 希少二枚貝イシガイ科の保護を目的とした生息個体密度が異なる水路における水質の比較2014

    • Author(s)
      田中仁志
    • Organizer
      第41回環境保全・公害防止研究発表会
    • Place of Presentation
      パレス神戸(神戸市)
    • Year and Date
      2014-12-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] An evaluation of habitats for freshwater bivalve unionid mussels in terms of water qualities in brooklets running through rice paddy fields in the central part of Himi City, Japan2014

    • Author(s)
      Hitoshi Tanaka
    • Organizer
      the 16th International Symposium on River and Lake Environment (ISRLE)
    • Place of Presentation
      Chuncyon, Korea
    • Year and Date
      2014-08-24 – 2014-08-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] イタセンパラとイシガイ科二枚貝が生息する富山県下の小河川における微生物群集構造の解析2014

    • Author(s)
      田中大祐
    • Organizer
      第48回日本水環境学会年会
    • Place of Presentation
      東北大学(仙台市)
    • Related Report
      2013 Annual Research Report
  • [Presentation] Environmental Investigation on the Habitat for Conservation of Endangered Freshwater Unionoid Mussels in Saitama Prefecture, Japan2013

    • Author(s)
      Htoshi Tanaka
    • Organizer
      The 9th Korea-Japan Environment Symposium
    • Place of Presentation
      Jeju Univercity, Jeju-do, Korea
    • Related Report
      2013 Annual Research Report

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Published: 2013-05-21   Modified: 2019-07-29  

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