養殖ブリ幼魚の水銀とセレンの蓄積

概要

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The accumulation of mercury and selenium in different tissues were followed by using commercially cultured young yellowtail, Seriola quinqueradiata. The levels of mercury increased significantly with growth in dorsal muscle of the fish fed mainly with sardines (mean mercury level is 0.05μg/g) and these concentrations were at similar levels to those of wild fish. On the other hand, the mercury levels in dorsal muscle of yellowtail fed with mackerel (mean mercury level is 0.09μg/g) alone were higher than those fed with sardines. The mercury level of liver was lower than that of dorsal muscle and independent of the latter. Heart tissue contained the highest amount of mercury among the organs analyzed. The mean ratios of methylmercury to total mercury of dorsal and dark muscle were about 65 and 85%, respectively. The correlation between the level of selenium and that of total mercury was significant in dorsal muscle. The mean molar ratios of selenium to mercury in dorsal, dark, and abdominal muscle were 19, 28, and 19, respectively.
日本水産學會の論文