中文摘要：

将牙鲆（Paralichthys olivaceus）置于不同浓度的Cu^2＋溶液中10d，测定其肌肉中过氧化氢酶（CAT）、谷胱甘肽过氧化物酶（GSH-PX）、超氧化物歧化酶（SOD）的活性。结果表明：随着Cu^2＋浓度的增高，CAT、SOD、GSH-PX的活性均表现为低浓度诱导，高浓度抑制；当处于低浓度Cu^2＋溶液中时，牙鲆肌肉中的SOD较CAT和GSH-PX敏感，因此其可作为水生生态系统中Cu^2＋低浓度暴露的一种生物检测指标。

英文摘要：

The experiment was to study the effect of Cu^2＋ on the antioxidative defence system in muscle of Paralichthys olivaceus, such as the activities of CAT, SOD and GSH-PX. After 10 days＇ exposure experiment, the results showed that the activities of CAT, SOD and GSH-PX were inducted in low concentration of Cu^2＋ and inhibited in high concentration of Cu^2＋ . These results also suggested SOD was more sensitive to low concentration of Cu^2＋ than the others, and it could be served as bio-monitoring index of low concentration Cu^2＋ exposure in aquatic ecosystem.