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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2014, Vol. 2, Issue 1, Part C

Effects of mercury on the activities of antioxidant defences in intestinal macrophages of fresh water teleost Channa punctatus (Bloch 1793)


Author(s): Moriom Begam, Mahuya Sengupta

Abstract: The present study aims to analyse the oxidative stress responses induced by sub-lethal concentrations of mercury and their effect on antioxidant defences in the intestinal macrophages of fresh water teleost Channa punctatus (Bloch 1793). The release of pollutants, especially heavy metals, into the aquatic environment is known to cause detrimental effects to the aquatic environment and to the organisms living therein as well as humans by entering the food chain. In the present study, samples of C. punctatus (Bloch 1793) were exposed to a sub-lethal concentration of mercury (0.3mg/L). After 4 days and 7 days of exposure, in the treated group, induction of oxidative stress in the intestine was evident from increased respiratory burst activity and lipid peroxidation levels. There were significant ultrastructural changes like fragmented epithelium, lesions in mucosal foldings, disoriented microvilli as evident from transmission electron micrographs. The antioxidants superoxide dismutase (SOD), catalase (CAT) and reduced glutathione (GSH) showed changes in a time dependent pattern, suggesting the use of these antioxidants as potential biomarkers of toxicity associated with exposure of freshwater fish to contaminants.



Pages: 172-179  |  787 Views  10 Downloads

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How to cite this article:
Moriom Begam, Mahuya Sengupta. Effects of mercury on the activities of antioxidant defences in intestinal macrophages of fresh water teleost Channa punctatus (Bloch 1793). Int J Fish Aquat Stud 2014;2(1):172-179.
International Journal of Fisheries and Aquatic Studies