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Abstract
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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
Submitted: May 30, 2012
Accepted: June 29, 2012
Published: July 25, 2012 |
Abstract:
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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.
Key words: Clarias gariepinus , condition factor, industrial effluents, oxidative stress, pollution, ,
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Cite this Reference:
Aina O. Adeogun, Ilelabayo M. Ogidan, Oju R. Ibor, Azubuike V. Chukwuka,, . Long-Term Exposure to Industrial Effluent Induces Oxidative Stress and Affects Growth in Clarias gariepinus . Research Journal of Environmental and Earth Sciences, (07): 738-746.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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