Chattonella marina赤潮除去剤の検討--特に過酸化水素と高度不飽和脂肪酸から発生するフリ-ラジカルの除去能

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In twelve substances expected as removal agents of a red tide plankton Chattonella marina, their destructive abilities to the plankton cells, resolvabilities in water, and influences to a fish were examined in order to evaluate their practical availabilities in the removal of the red tide plankton. Hydrogen peroxide seemed to be the most prospective agent, because it destroyed the plankton above 15mg/l and scarcely injured the cultured fish below 50mg/l. In the exposure of the yellowtail to C. marina 5, 300 cells/ml, the addition of the 50mg/l hydrogen peroxide made the fish survive over an extra 3h.Regarding the destruction of the plankton cells, eicosapentaenoic acid, an allelopathic substance of algae, and hydrogen peroxide executed the intense abilities. However, the plankton cells were not destroyed by saturated fatty acid and polyunsaturated fatty acid methyl esters. In the hydrogen peroxide, formic acid, a scavenger of free radicals, disturbed the destructive ability, whereas the ability was amplified by Fe2+ probably because of Fenton reaction. Therefore, free radical derived from these chemicals seems to be responsible for the destruction of the plankton cells.
日本水産學會の論文