Bioaccumulation and Biochemical Response of Liza parsia to Copper

The test organism Liza parsia exposed to copper concentrations in static bioassay was evaluated to study toxicity, bioaccumulation rate and oxidative stress responses. The 96-hour LC50 was found to be 1.25 mg/l (0.883-1.672) in static renewal bioassay. The bioaccumulation study revealed significant increase (Pless than0.05) in the accumulation of copper in L. parsia with increase in the ambient concentration. L. parsia accumulated 3.38, 16.45, 27.10, 48.85, 86.18 and 175.62 �g/g dry weight of copper in 0.5, 1, 2, 4 and 8 mg/l of exposed copper concentrations. Significant (Pless than0.05) decrease in concentration of protein and acetylcholinesterase activity, and significant (Pless than0.001) increases in lipid peroxidation content and catalase activity was recorded. Lipid peroxidation and catalase were found to be the promising biomarkers in heavy metal pollution with special reference to copper.