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Effect of herbicides derived from land on competition between marine diatoms and flagellates: Do the herbicides trigger the flagellates blooms?

Research Project

Project/Area Number 26850120
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Aquatic bioproduction science
Research InstitutionJapan Fisheries Research and Education Agency

Principal Investigator

Onduka Toshimitsu  国立研究開発法人水産総合研究センター, その他部局等, 研究員 (00371972)

Co-Investigator(Renkei-kenkyūsha) NAKAYAMA NATSUKO  国立研究開発法人水産総合研究センター, 瀬戸内海区水産研究所, 主任研究員 (20612675)
ITO KATSUTOSHI (ITO MANA)  国立研究開発法人水産総合研究センター, 瀬戸内海区水産研究所, 主任研究員 (80450782)
MOCHIDA KAZUHIKO  国立研究開発法人水産総合研究センター, 瀬戸内海区水産研究所, 有害物質グループ長 (00371964)
Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords珪藻 / 鞭毛藻 / プランクトン遷移 / 福山港 / 藻類競合関係
Outline of Final Research Achievements

Ten kind of herbicides were identified in environmental water in Hukuyama Port and the mouth of the Ashida River where flagellate blooms were generated in recent years. Bromobutide, cyanazine, bromacil, and pretilachlor were detected at relatively high frequency, these concentration was relatively high from June to August. Flagellate cells were identified in that same period.
The acute toxicities of these herbicides to a diatom Chaetoceros sp. and a flagellate Heterosigma akashiwo were assessed, Chaetoceros sp. was more sensitive to cyanazine, bromacil, and pretilachlor than H. akashiwo. The growth rate of the diatom was decreased with these herbicides, and the growth rate of the flagellate faster than that of the diatom in the toxicity tests. Herbicides may therefore influence generation of flagellate blooms.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (4 results)

All 2015 2014

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

  • [Presentation] 防汚物質ポリカーバメートが藻類競合関係に及ぼす影響:生長速度を指標にして2015

    • Author(s)
      隠塚俊満,中山奈津子,大久保信幸,持田和彦
    • Organizer
      第21回日本環境毒性学会研究発表会
    • Place of Presentation
      東洋大学白山キャンパス(東京都・文京区)
    • Year and Date
      2015-09-02
    • Related Report
      2015 Annual Research Report
  • [Presentation] Effect of the antifouling biocide polycarbamate on competition between marine diatoms and flagellates at different nutrient levels2015

    • Author(s)
      Onduka Toshimitsu,Nakayama Natsuko, Ohkubo Nobuyuki, Mochida Kazuhiko
    • Organizer
      17th International Symposium on Toxicity Assessment
    • Place of Presentation
      Bellingham (USA)
    • Year and Date
      2015-08-08
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 福山港海水中で検出した除草剤に対する珪藻および鞭毛藻の感受性比較2015

    • Author(s)
      隠塚俊満、中山奈津子、伊藤克敏、持田和彦
    • Organizer
      平成27年度日本水産学会春季大会
    • Place of Presentation
      東京海洋大学品川キャンパス(東京都、港区)
    • Year and Date
      2015-03-27 – 2015-03-31
    • Related Report
      2014 Research-status Report
  • [Presentation] 防汚物質としても使用されている農薬2種の海産生物に及ぼす影響2014

    • Author(s)
      隠塚俊満
    • Organizer
      平成26年度漁場環境保全関係研究開発推進会議有害物質部会 シンポジウム「沿岸生態系に及ぼす農薬の影響を考える」
    • Place of Presentation
      ホテルチューリッピ東方2001(広島県、広島市)
    • Year and Date
      2014-11-19
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2017-05-10  

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