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Studies on the mechanism for bloom formation of the red tide causing flagellates Chattonella (Raphidophyceae)

Research Project

Project/Area Number 16K07823
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Aquatic bioproduction science
Research InstitutionMie University

Principal Investigator

Ishikawa Akira  三重大学, 生物資源学研究科, 教授 (00273350)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords有害赤潮ラフィド藻 / シャットネラ / シスト / 発芽 / 栄養細胞 / 英虞湾 / 有害赤潮 / 個体群形成
Outline of Final Research Achievements

Temporal changes in the in situ germination flux of cysts and the abundance of vegetative cells of Chattonella (Raphidophyceae) were investigated in Ago Bay, central Japan from June 2016 to January 2018. The in situ germination flux was measured using ‘plankton Emergence Trap Chambers (PET Chamber)’.
The cysts started to germinate in spring when the sediment temperature reached the value that of enables the cyst to germinate. The vegetative cells, in turn, built a large population in summer when the water temperature became favorable for their growth. From these, it was concluded that, although cysts play an important role as seeds in the initiation of vegetative growth, the vegetative population size cannot be determined by the extent of the germination flux but determined by that of the growth rate itself.

Academic Significance and Societal Importance of the Research Achievements

ラフィド藻類のシャットネラは国内外の各地で赤潮を起こし魚類の大量斃死を引き起こす有害鞭毛藻であるため、その個体群形成機構を解明することは水産学的に重要な課題である。本研究課題で取り組んだ研究手法により、栄養細胞群増殖のタネとなるシストの現場における発芽と栄養細胞の増殖において温度が大きく関わっていることを示し得た。このことは、各海域におけるシャットネラの個体群形成機構を解明するために重要な基礎的知見となるものであり、またシャットネラの増殖を予知する上でも大きく貢献するものである。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (18 results)

All 2018 2017 2016

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Int'l Joint Research: 5 results) Book (3 results)

  • [Journal Article] A simple technic for establishing axenic cultures of centric diatoms from resting cells in bottom sediments2018

    • Author(s)
      Ishii, K., Sawayama, S., Ishino, R., Liu, W., Fukusaki, K., Natsuike, M., Imai, I., Ishikawa, A.
    • Journal Title

      Phycologia

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] An effective method for detecting prey DNA from marine dinoflagellates belonging to the genera Dinophysis and Phalacroma using a combination of PCR and restriction digestion technique2018

    • Author(s)
      Nishitani, G., Kosaka, Y., Nagai, S., Takano, Y., Kim, Y.-O., Ishikawa, A.
    • Journal Title

      Plankton and Benthos Research

      Volume: 印刷中

    • NAID

      130006744039

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Germination fluctuation of toxic Alexandrium fundyense and A. pacificum cysts and the relationship with bloom occurrences in Kesennuma Bay, Japan2017

    • Author(s)
      Masafumi Natsuike, Katsuhide Yokoyama, Goh Nishitani, Yuichiro Yamada, Ikuo Yoshinaga, Akira Ishikawa
    • Journal Title

      Harmful Algae

      Volume: 62 Pages: 52-59

    • DOI

      10.1016/j.hal.2016.11.018

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Atmospheric aerosol deposition influences marine microbial communities in oligotrophic surface waters of the western Pacific Ocean2016

    • Author(s)
      Maki, T., A. Ishikawa, T. Matsunaga, S. B. Pointing, Y. Saito, T. Kasai, K. Watanabe, K. Aoki, A. Horiuchi, K. C. Lee, H. Hasegawa, and Y. Iwasaka
    • Journal Title

      Deep Sea Research Part I: Oceanographic Research Papers

      Volume: 118 Pages: 37-45

    • DOI

      10.1016/j.dsr.2016.10.002

    • NAID

      120005982995

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] アジア大陸期起源の越境エアロゾルが貧栄養海域微生物に及ぼす生態学的影響の解明:太平洋沖合の海水を用いた洋上培養実験2016

    • Author(s)
      朝日裕也、牧輝弥、石川輝、松永智樹、渡辺幸一、青木一真、堀内周、長谷川浩、岩坂泰信
    • Journal Title

      日本海水学会誌

      Volume: 70 Pages: 28-40

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] 伊勢湾および三河湾の海底泥表層におけるSkeletonema属休眠細胞の現存量と種組成2018

    • Author(s)
      石川輝、舟橋花奈、奥村順哉、西谷豪
    • Organizer
      日本プランクトン・日本ベントス学会合同大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 伊勢湾奥部海底堆積物中における渦鞭毛藻シストとChaetoceros属休眠胞子の鉛直分布2018

    • Author(s)
      宮嶋優里、松岡數充、石井健一郎、石川輝
    • Organizer
      日本プランクトン・日本ベントス学会合同大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] An effective method for detecting prey DNA from the genera Dinophysis and Phalacroma by using two specific primer sets2018

    • Author(s)
      Nishitani, G., Ishikawa, A.
    • Organizer
      The 18th International Conference on Harmful Algae
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 渦鞭毛藻Scrippsiella trochoideaのシストを利用した内湾の貧酸素環境評価の試み2017

    • Author(s)
      石川 輝、若林大晃、田口和典、山本圭吾、Hyeon Ho Shin、Young-Ok Kim
    • Organizer
      日本プランクトン学会・日本ベントス学会合同大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 伊勢湾におけるミドリムシの出現動態2017

    • Author(s)
      胡 静、西谷 豪、石川 輝
    • Organizer
      日本プランクトン学会・日本ベントス学会合同大会
    • Related Report
      2017 Research-status Report
  • [Presentation] A molecular tool for detecting prey items of a heterotrophic marine dinoflagellate, Dinophysis rotundata2017

    • Author(s)
      Nishitani, G., Takagi, N., Takano, Y., Nagai, S., Kim, Y.-O., Ishikawa, A.
    • Organizer
      日本水産学会国際シンポジウム
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of new primer sets to detect prey DNA from marine dinoflagelalte, Dinophysis spp.2017

    • Author(s)
      Nishitani, G., Takagi, N., Takano, Y., Nagai, S., Kim, Y.-O., Kosaka, Y., Ishikawa, A.
    • Organizer
      10th EASTHAB Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Horizontal distribution of diatom resting cells and dinoflagellate cysts in surface sediments of Osaka Bay, West Japan2017

    • Author(s)
      Ishii, K., Ishikawa, A., Imai, I., Matsuoka, K.
    • Organizer
      10th EASTHAB Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 黄砂鉱物粒子が外洋の植物プランクトン群集の動態に及ぼす影響2016

    • Author(s)
      石川輝、笠井智顕、牧輝弥
    • Organizer
      日本プランクトン学会・日本ベントス学会合同大会
    • Place of Presentation
      熊本県立大学(熊本県・熊本市)
    • Year and Date
      2016-09-09
    • Related Report
      2016 Research-status Report
  • [Presentation] Pelagic protists feeding on pico-cyanobacteria and their chlorophyll catabolisms2016

    • Author(s)
      Shihongi, A., Kinoshita, Y., Ishikawa, A., Tamiaki, H., Kashiyama, Y.
    • Organizer
      Protist-2016 (International Society of Protistlogists)
    • Place of Presentation
      Moscow (Russia)
    • Year and Date
      2016-06-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Book] 有害有毒プランクトンの科学2016

    • Author(s)
      石川輝、石井健一郎
    • Total Pages
      340
    • Publisher
      恒星社厚生閣
    • Related Report
      2016 Research-status Report
  • [Book] 有害有毒プランクトンの科学2016

    • Author(s)
      石井健一郎、石川輝、今井一郎
    • Total Pages
      340
    • Publisher
      恒星社厚生閣
    • Related Report
      2016 Research-status Report
  • [Book] 有害有毒プランクトンの科学2016

    • Author(s)
      西谷豪、石川輝、高坂祐樹、今井一郎
    • Total Pages
      340
    • Publisher
      恒星社厚生閣
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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