合成洗剤成分のヒメダカへの影響(3) : 光学顕微鏡観察による組織への影響を中心として

概要

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The acute toxicity test on the several kinds of synthetic detergents and LAS (Sodium linear-Dodecylbenzene-sulfonate Standard) was conducted. As a result, strong toxicity was admitted in all synthetic detergents and LAS. TLm 24 of detergent C to which the fish toxicity was the weakest was 37.84ppm. TLm 24 of LAS with the strongest fish toxicity was 5.75ppm. Moreover, influence on tissue of Himedaca was observed with the light microscope. As a result, abnormality was not admitted in Himedaca of contrast fish. Abnormality was admitted in the gill filament (secondary gill lamella), the epidermis (flat epithelial cell layer), and the muscle (muscle fiber) of Himedaca that had done the acute toxicity test. The club-shape was admitted in the second gill lamella, the desquamation was admitted in the flat epithelial cell layer, and the atrophy was admitted in the muscle fiber. It is necessary to investigate in the future because the LAS density in water environment has not necessarily decreased.