| Project/Area Number |
23580285
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fisheries chemistry
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| Research Institution | Kitasato University |
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Principal Investigator |
KOTAKI Yuichi 北里大学, 海洋生命科学部, 准教授 (30113278)
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| Co-Investigator(Kenkyū-buntansha) |
KOBIYAMA Atsushi 北里大学, 海洋生命科学部, 准教授 (60337988)
YASUMOTO Ko 北里大学, 海洋生命科学部, 講師 (00448200)
TERADA Ryuta 鹿児島大学, 水産学部, 准教授 (70336329)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 記憶喪失性貝毒 / ドウモイ酸 / イソドウモイ酸 / Pseudo-nitzschia / Nitzschia / navis-varingica / ハナヤナギ / 黒潮 / 細菌 / 分布特性 / 珪藻 / multiseries |
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| Research Abstract |
Distribution, ASP toxin production characteristics and the dynamics of these toxins were surveyed for the toxin producing diatom, Pseudo-nitszchia multiseries, Nitzschia navis-varingica and red alga Chondria armata. It was hypothesized that N. navis-varingica is a tropical species and expanded its distribution to eastern Japan along the warm water current "Kuroshio" which flows from the east coast of the Philippines to Japan. The characteristics of growth and the geographical comparison in the toxin profiles and genetic markers in N. navis-varingica strains along the "Kuroshio" supported the above hypothesis. N. navis-varingica shows the toxin profiles composed of domoic acid and isodomoic acids A and B. Factors controlling the toxin profiles were searched, resulting in finding the important roles of genetic difference and environmental bacteria. Bacterial effect on the toxin production seemed to be the most obvious in P. multiseries culture than in other organisms cultures.
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