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标题：Long-Term Exposure to Industrial Effluent Induces Oxidative Stress and Affects Growth in Clarias gariepinus
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作者：Aina O. Adeogun ; Ilelabayo M. Ogidan ; Oju R. Ibor 等
期刊名称：Research Journal of Environmental and Earth Sciences
印刷版ISSN：2041-0484
电子版ISSN：2041-0492
出版年度：2012
卷号：4
期号：7
页码：738-746
出版社：Maxwell Science Publications
摘要：The study investigated the effects of chronic exposures to binary mixtures of industrial effluents on growth and biomarkers of oxidative stress in Clarias gariepinus. Concentrations 7.67, 3.83, 2.56 and 1.92% which were fractions of a preliminary 96 h LC₅₀ and control were used in the static/renewal bioassay. Physicochemical parameters (Temperature, pH, DO) of the test media were measured and the activities of Superoxide Dismutase (SOD), Catalase (CAT), Glutathione (GSH) and Malondialdehyde (MDA) formation in the various tissues (kidney, liver and gills) of fish were evaluated. Physicochemical parameters of exposure concentrations ranged from 27.10±1.05-31.00±2.30°C, 5.96±0.09-7.16±0.02, 0.42±0.03-2.11±0.42 mg/L indicating low dissolved oxygen and slightly acidic pH. Exposed fish had poor condition factor (0.74±0.04) compared with control fish (1.25±0.03). Significant increases (p<0.05) from control fish were recorded in the activities SOD and CAT in the liver and gills, while the kidney showed no significant increase across all exposure concentrations. Glutathione activity (GSH) increased significantly (p<0.05) from control fish in the liver, while the kidney and gills showed no significant increase across all exposure concentrations. Malondialdehyde (MDA) levels were significantly elevated (p<0.05) in the kidney of exposed fish, while the gills and liver showed no significant increase across exposure all concentrations. Our results indicated that exposure of fish to industrial effluents induced oxidative stress and were reflected in significant reduction of body weight and poor CF of exposed fish; ultimately these may have significant effects on the sustainability of fish population in polluted aquatic systems.
关键词：Clarias gariepinus ; condition factor; industrial effluents; oxidative stress; pollution; ;