シロザメおよびホシザメの水銀およびセレンレベル

概要

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In 29 individuals of two species of sharks Mustelus griseus and Mustelus manazo levels of total mercury (T-Hg), methyl mercury (MeHg) and selenium (Se) in muscle tissue were determined. The range of T-Hg, MeHg and Se were as follows: 0.13-0.70, 0.11-0.68 and 0.17-0.27μg/g wet weight in Mustelus griseus, respectively: and 0.13-0.98, 0.12-0.88 and 0.21-0.46μg/g wet weight in Mustelus manazo, respectively. The correlation coefficient between T-Hg and length was positive and statistically significant in both species, while for Se insignificant correlation was observed. In Mustelus manzo, T-Hg depended closely on the age of the fish. The correlation coefficient between Se/Hg in molar basis and T-Hg was negative and statistically highly significant in both species. In embryo, both mercury levels were considerably low, while Se was nearly the same in comparison with those of the mother.
日本水産學會の論文