alexa Acute effects of copper on superoxide dismutase, catalase and lipid peroxidation in the freshwater teleost fish, Esomus danricus
Agri and Aquaculture

Agri and Aquaculture

Journal of Marine Science: Research & Development

Author(s): Sesha Srinivas Vutukurua, J Venkateswara Rao, Y Anjaneyulu

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Static-renewal bioassays [Methods for acute toxicity tests with fish, macro-invertebrates and amphibians: USEPA, ERS, EPA 660/3 75-009 (1975)] were carried out on Esomus danricusexposed to sub-lethal (0.55 mg/l) and lethal (5.5 mg/l) concentrations of copper. The 96-h median lethal concentration (LC50) was 5.5 mg/l. Biochemical stress responses, such as visceral superoxide dismutase (SOD) and catalase (CAT) activities, were measured during this 96-h period. Malondialdehyde, a product of lipid peroxidation, was present at elevated levels in the visceral tissue of copper-exposed fish. Copper was found to be highly toxic to the fish and induced significant declines (p < 0.05–0.001) in all of the biochemical profiles studied, demonstrating a linear and positive correlation with both the concentration and duration of exposure to copper. In E. danricus, CAT appeared to be more sensitive to copper exposure (p < 0.001) than SOD at both lethal and sub-lethal levels. These results indicate that antioxidant responses can be employed as biomarkers of oxidative stress for this species in aquatic environments contaminated with copper.

This article was published in Fish Physiology and Biochemistry and referenced in Journal of Marine Science: Research & Development

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