The present paper intends to introduce the experimental results of ours on the effects of Cu2+ and Cd2+ on Na+-K+-ATPase activity of gills and superoxid dismutase activity of the liver in Miichthys miiuy.In our experiments,we have adopted early cultivated juvenile Miichthys miiuy with their average weight between 10.0-11.2 g and average length of about 9.5-10.0 cm.As a rule,it took usually 8 days to domesticate the fish before the experiments began.The results of our experiments indicate that Cu2+(0.01 mg/L...