Cadmium accumulation in organs of the scallop Mizuhopecten yessoensis--I. Activities of phosphatases and composition and amount of lipids.

Maintenance of Mizuhopecten yessoensis in water with 0.5 mg Cd/l for 60 days increased Cd concentration in the mantle and ovaries about 200 times, in gills 70 times and hepatopancreas 20 times. Alkaline phosphatase activity was inhibited in all organs except the hepatopancreas after a 1-month exposure to Cd and became equal to the control in all the organs after 2 months exposure. Molluscs transferred to flowing water showed a considerable decrease in the activity of alkaline and acid phosphatases. The activity of both acid phosphatase and Mg2+-ATPase decreased in all the organs of experimental molluscs after exposure to Cd. The amount of phospholipids and cholesterol in the organs of control and experimental molluscs did not essentially differ.