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Genotypic diversity and phylogeography of harmful raphidophyte Chattonella in Southeast Asia

Research Project

Project/Area Number 19H03027
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 40030:Aquatic bioproduction science-related
Research InstitutionThe University of Tokyo

Principal Investigator

Iwataki Mitsunori  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (50423645)

Co-Investigator(Kenkyū-buntansha) 高橋 和也  東京大学, 大学院農学生命科学研究科(農学部), 特任研究員 (00821109)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2019: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Keywords有害藻類 / 赤潮 / ラフィド藻 / シャットネラ / 系統分類 / 微細構造 / 分布 / 東南アジア / 増殖特性
Outline of Research at the Start

有害ラフィド藻シャットネラは世界の温帯・亜熱帯沿岸域に分布が知られるが,近年では熱帯の東南アジアでも本属赤潮による漁業被害が発生している。東南アジア沿岸域には日本等に分布する系統群,地中海等に分布する系統群に加え,未報告の新規系統群も複数混在することが予備調査より確認されたことから,本研究では,東南アジア沿岸域を網羅した情報収集と試料採集を行い,新規系統群を固有形質に基づいて記載し,個体群ごとの分布,シスト形成能,増殖特性を把握する。

Outline of Final Research Achievements

Occurrences and associated fisheries damages have been documented, and distribution of intrageneric phylotypes were analyzed for the marine harmful raphidophyte Chattonella in Southeast Asian coastal waters. In the Southeast Asian countries, only three cases have been recorded until 1989, and more than 30 cases including eight fisheries damages have been recorded until 2019. Molecular phylogeny inferred from ITS and LSU rDNA sequences showed the presence of C. marina phylotype in East Asia, while four phylotypes (C. marina, C. subsalsa and two new phylotypes) in Southeast Asia. In Southeast Asia, fisheries damages have been caused mainly by the C. subsalsa phylotype. Among the four Chattonella phylotypes found in Southeast Asia, the highest growth rate for higher temperature (>30.5℃) was obtained from a culture of C. subsalsa phylotype.

Academic Significance and Societal Importance of the Research Achievements

海産ラフィド藻Chattonellaは日本沿岸で大きな漁業被害を発生してきた有害藻類である。東南アジアでは出現情報も限られていたが,近年では本属による漁業被害が発生していた。本研究で明らかにした東南アジアにおける本属系統群の分布情報により,東アジアにはC. marina系統群のみが分布する一方,東南アジアにはこれを含む4系統群が混在し,中でもC. subsalsa系統群が高水温に対する耐性が高く,漁業被害にも関わってきたことが推察された。この識別技術により,日本沿岸にC. subsalsa系統群などが将来導入された際にも,出現が知られていたC. marina系統群との識別が可能となる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (29 results)

All 2021 2020 2019 Other

All Int'l Joint Research (18 results) Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Funded Workshop (2 results)

  • [Int'l Joint Research] マラヤ大学/マレーシア大学サラワク校(マレーシア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] フィリピン大学ディリマン校/フィリピン水産資源局/セントラルルソン州立大学(フィリピン)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] チュラロンコン大学(タイ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 海洋水産研究所/ベトナム海洋研究所(ベトナム)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] シンガポール大学(シンガポール)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] マラヤ大学/マレーシア大学サラワク校(マレーシア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] フィリピン大学ディリマン校/フィリピン水産資源局/セントラルルソン州立大学(フィリピン)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] チュラロンコン大学(タイ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] 海洋水産研究所/ベトナム海洋研究所(ベトナム)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] シンガポール大学(シンガポール)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] マラヤ大学/マレーシア大学サラワク校(マレーシア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] フィリピン大学ディリマン校/フィリピン水産資源局/フィリピン水産資源開発研究所(フィリピン)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] チュラロンコン大学(タイ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 海洋水産研究所/ベトナム海洋研究所(ベトナム)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] シンガポール大学(シンガポール)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2019 Annual Research Report
  • [Journal Article] The harmful raphidophyte Chattonella (Raphidophyceae) in Western Pacific: Its red tides and associated fisheries damage over the past 50 years (1969-2019)2021

    • Author(s)
      W.M. Lum, G. Benico, H. Doan-Nhu, E. Furio, C.P. Leaw, S. Leong, P.T. Lim, W.A. Lim, T. Lirdwitayaprasit, S. Lu, M. Awan, N.V. Nguyen, T. Orlova, A. Rachman, S. Sakamoto, K. Takahashi, S.T. Teng, H. Thoha, P. Wang, A.T. Yniguez, K. Wakita, M. Iwataki
    • Journal Title

      Harmful Algae

      Volume: 107 Pages: 102070-102070

    • DOI

      10.1016/j.hal.2021.102070

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts2021

    • Author(s)
      G.M. Hallegraeff, D.M. Anderson, C. Belin, M.-Y.D. Bottein, E. Bresnan, M. Chinain, H. Enevoldsen, M. Iwataki, B. Karlson, C.H. McKenzie, I. Sunesen, G.C. Pitcher, P. Provoost, A. Richardson, L. Schweibold, P.A. Tester, C.L. Trainer, A.T. Yniguez, A. Zingone
    • Journal Title

      Communications Earth & Environment

      Volume: 2 Issue: 1 Pages: 117-117

    • DOI

      10.1038/s43247-021-00178-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Over 30 years of HABs in Southeast Asia: what have we learned from records in the Philippines and Malaysia?2020

    • Author(s)
      A.T. Yniguez, P.T. Lim, C.P. Leaw, S.J. Jipanin, M. Iwataki, G. Benico and R.V. Azanza
    • Journal Title

      Harmful Algae

      Volume: - Pages: 101776-101776

    • DOI

      10.1016/j.hal.2020.101776

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Harmful algal blooms and associated fisheries damage in East Asia: current status and trends in China, Japan, Korea and Russia2020

    • Author(s)
      S. Sakamoto, W.A. Lim, D. Lu, X. Dai, T. Orlova and M. Iwataki
    • Journal Title

      Harmful Algae

      Volume: - Pages: 101787-101787

    • DOI

      10.1016/j.hal.2020.101787

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Morphology and molecular phylogeny of the harmful raphidophyte Chattonella subsalsa isolated from Bolinao, Philippines2019

    • Author(s)
      W.M. Lum, G. Benico, R. Azanza, E. Furio, P.T. Lim, H.C. Lim, K. Takahashi and M. Iwataki
    • Journal Title

      Philippine Journal of Natural Sciences

      Volume: 24 Pages: 50-56

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Are harmful marine microalgal blooms and their societal impacts increasing? A 30 year global data analysis2021

    • Author(s)
      M. Hallegraeff, D.M. Anderson, C. Belin, M.-Y.D. Bottein, E. Bresnan, M. Chinain, H. Enevoldsen, M. Iwataki, B. Karlson, C.H. McKenzie, I. Sunesen, G.C. Pitcher, P. Provoost, A. Richardson, L. Schweibold, P.A. Tester, C.L. Trainer, A.T. Yniguez, A. Zingone
    • Organizer
      19th International Conference on Harmful Algae
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Phylogeny and distribution of Chattonella marina complex and C. subsalsa in Southeast Asia2021

    • Author(s)
      W.M. Lum, G. Benico, C.P. Leaw, S.C.Y. Leong, P.T. Lim, Muawanah, A. Rachman, K. Takahashi, S.T. Teng, H. Thoha, A.T. Yniguez, M. Iwataki
    • Organizer
      日本藻類学会第45回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Taxonomy and molecular characterization of fish-killing algae2019

    • Author(s)
      M. Iwataki
    • Organizer
      Advanced International Colloquium and Technical Workshop on Fish-Killing Marine Algae and Their Effects
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ultrastructure of Chattonella subsalsa (Raphidophyceae) found in Philippine water2019

    • Author(s)
      W.M. Lum, G. Benico, K. Takahashi, R. Azanza, E. Furio, M. Iwataki
    • Organizer
      11th EASTHAB Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Funded Workshop] WESTPAC-HAB国際ワークショップ2021

    • Related Report
      2020 Annual Research Report
  • [Funded Workshop] WESTPAC-HAB国際ワークショップ2019

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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