Grant-in-Aid for International Scientific Research.
|Research Institution||The University of Tokyo|
FUKUYO Yasuwo The University of Tokyo, Asian Natural Environmental Science Center, Associate Professor, アジア生物資源環境研究センター, 助教授 (10165318)
WISESSANG Su タイ, チュラロンコン大学・理学部, 助教授
HOI Nguven C ヴェトナム, ハイフォン海洋研究所, 所長
NOOR Normawa マレーシア農科大学, 科学環境学部, 助手
ANTON Ann マレーシア, サバ大学・科学技術学部, 助教授
MARASIGAN Ar フィリピン大学, 水産学部養殖研究所, 助教授
WIADNYANA Ng インドネシア国立海洋研究所, 研究官
FURIO Elsa フィリピン水産資源局, 主任研究官
岡本 研 東京大学, 農学部, 助手 (20160715)
岩槻 幸雄 宮崎大学, 農学部, 助教授 (60213302)
OGATA Takehiko Kitasato University, School of Fisheries Sciences Associate Prof., 水産学部, 助教授 (00104521)
石丸 隆 東京水産大学, 教授 (90114371)
MATSUOKA Kazumi Nagasaki University, Faculty of Fisheries Professor, 水産学部, 教授 (00047416)
KODAMA Masaaki Kitasato University, School of Fisheries Sciences Professor, 水産学部, 教授 (40050588)
OCHI Tadashi Kagawa University, Faculty of Agriculture Associate Professor, 農学部, 助教授 (00035990)
堀 繁 東京大学, アジア生物資源環境研究センター, 教授 (90143403)
田中 學 東京大学, 大学院・農学生命科学研究科, 教授 (70012028)
FURUYA Ken Graduate School of Agricultural Life Science Associate Prof., 大学院・農学生命科学研究科, 助教授 (30143548)
|Project Fiscal Year
1996 – 1998
Completed(Fiscal Year 1998)
|Budget Amount *help
¥17,700,000 (Direct Cost : ¥17,700,000)
Fiscal Year 1998 : ¥3,600,000 (Direct Cost : ¥3,600,000)
Fiscal Year 1997 : ¥8,300,000 (Direct Cost : ¥8,300,000)
Fiscal Year 1996 : ¥5,800,000 (Direct Cost : ¥5,800,000)
|Keywords||Harmful Plankton / Harmful Red Tide / Toxic Dinoflagellates / Paralytic Shellfish Toxin / Southeast Asia / Vietnam / Philippines / Malaysia / 有害プランクトン / 有害赤潮 / 有害渦鞭毛藻 / 麻痺性貝毒 / 東南アジア / ヴェトナム / フィリピン / マレーシア / 有毒渦鞭毛藻 / 赤潮 / インドネシア / タイ|
Cooperative research among scientists in Japan and western Pacific countries, especially Southeast Asia, was conducted in order to clarify the current situation of distribution of toxic plankton, which caused toxin contamination in fish and shellfish, with emphasis on elucidation of mechanism of their geographical expansion. The research result revealed that causative organisms responsible for paralytic shellfish poisoning (PSP), Pyrodinium bahamense, Gymnodinium catenatum, and Alexandrium spp. occurred widely in tropical waters. Two dinoflagellates possibly responsible for diarrhetic poisoning (DSP), Dinophysis caudata and D.miles were also found commonly in tropical waters. A diatoms responsible for amnesic poisoning (ASP) Pseudo-nitzschia spp. were also distributed widely, but any toxin contamination had not been confirmed yet. Distribution of these toxic species looks wider and wider, as research was conducted in new area, although it was not clear whether the species invaded from other place recently or stayed the same area for a long time.
In the Philippines, where damage caused by PSP is most serious in the world, the distribution of P.bahamense was expanding to south to Mindanao Island. The same species was found in Saba, Malaysia where water current reach from Mindanao. Other PSP species, G.catenatum and Alexandrium sp. were also found in the Philippine waters. Using plankton samples collected from Panay Island, DSP toxin productivity of D.caudata and D.miles was confirmed for the first time in tropical dinoflagellates.
In Vietnam, where the occurrence of toxic plankton was denied before the present research, four Alexandrium species (A.andersonii, A.insuetwn, A.minutum, A.tamiyavanichii) were found in coastal waters and shrimp culture ponds. PSP toxin productivity of A.minutum was confirmed using an unialgal culture. ASP toxicity was found in benthic diatom, Nitzschia sp, isolated from shrimp culture pond.