Copper and Zinc Toxicity Estimates for Juvenile Chinese Sturgeon Acipenser sinensis in the Yangtze River Estuary

文献类型： 外文期刊

第一作者： Feng, Guangpeng

作者： Feng, Guangpeng;Yao, Zhifeng;Zhang, Longzhen;Zhuang, Ping;Shi, Xiaotao;Feng, Guangpeng;Yao, Zhifeng

作者机构：

关键词： Toxicity estimation; Antioxidant enzyme; Chinese sturgeon; Yangtze river estuary

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2017 年 19 卷 3 期

页码：

收录情况： SCI

摘要： Acute toxicity estimates of copper (Cu) and zinc (Zn) in juvenile Chinese sturgeon were studied in the Yangtze River estuary and using the static test method to assess Cu and Zn toxicity. The results showed that Cu was more severely toxic to Chinese sturgeon than Zn. The Cu LC50 after 24-, 48-, 72- and 96-h exposures to Chinese sturgeon were 0.0606, 0.0414, 0.0289 and 0.0217 mg.L-1, respectively, whereas these values were 3.590, 2.514, 1.759 and 1.200 mg.L-1 for Zn, respectively. Estimated safe concentrations of Cu and Zn were 0.00217 and 0.1200 mg.L-1, respectively. However, the Cu and Zn standards for fisheries water quality in China are 0.01 and 0.10 mg.L-1, respectively. The liver was the major accumulation site for Cu. Cu content in the liver of juveniles in the control group (no Cu) was the highest, followed by the gills, whereas the lowest content was detected in cartilage. The fastest accumulator of Cu was the liver, followed by the stomach, and cartilage and skin had the lowest contents. Superoxide dismutase (SOD) and catalase (CAT) activities in the liver tissues of juveniles were relatively low for the first 24 h, but the activities recovered gradually from 24 to 48 h and decreased after 48 h to levels lower than the control group. These changes in SOD and CAT activities indicate that juvenile Chinese sturgeon were severely affected by Cu. These data show that Chinese sturgeon juveniles face the threat of Cu contamination and this alerts officials to the dangerous situation. (C) 2017 Friends Science Publishers

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