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    Abstract
2012 (Vol. 4, Issue: 07)
Article Information:

Long-Term Exposure to Industrial Effluent Induces Oxidative Stress and Affects Growth in Clarias gariepinus

Aina O. Adeogun, Ilelabayo M. Ogidan, Oju R. Ibor, Azubuike V. Chukwuka,
Corresponding Author:  Adeogun Aina 

Key words:  Clarias gariepinus , condition factor, industrial effluents, oxidative stress, pollution, ,
Vol. 4 , (07): 738-746
Submitted Accepted Published
May 30, 2012 June 29, 2012 July 25, 2012
Abstract:

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 27.101.05-31.002.30C, 5.960.09-7.160.02, 0.420.03-2.110.42 mg/L indicating low dissolved oxygen and slightly acidic pH. Exposed fish had poor condition factor (0.740.04) compared with control fish (1.250.03). 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.
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  Cite this Reference:
Aina O. Adeogun, Ilelabayo M. Ogidan, Oju R. Ibor, Azubuike V. Chukwuka,, 2012. Long-Term Exposure to Industrial Effluent Induces Oxidative Stress and Affects Growth in Clarias gariepinus .  Research Journal of Environmental and Earth Sciences, 4(07): 738-746.
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ISSN (Online):  2041-0492
ISSN (Print):   2041-0484
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