In the present study, we have exposed marine fishes, to two different doses (15 mg/L) of Cu-NPs and (2mg/L) dibutyltin for six days. The doses selected were eco-relevant considering the contamination levels of certain water resources. The results indicated that the activity oxidative stress enzymes reduced glutathione (GSH), acetylcholinesterase (AChE) and glutathione -S-transferase (GST) were significantly decreased in the liver, brain and gills of the treated groups when compared to control. Taken together, the results of suggest that short-term exposure of marine fish to Cu-NPs and dibutyltin causes oxidative stress and impart serious deleterious effects in the tissues which may affect fish growth and development and causes death. In the case of gills, liver and brain when exposed to both concentrations of CuO and dibutyltin (NPs), although activity of these enzymes showed an inhibition in the liver when exposed to both concentrations of NPs. The present study investigated that CuO NPs are more toxic than dibutyltin.

It has been suggested that the antifouling agents can cause aquatic pollution and subsequent accumulation in fish constitute a substantial risk to human health and to the environment. Therefore, our study purposed to further investigate the effects of copper-oxide nanoparticles (CuO-NPs) and dibutyltin on marine fish to compare CuO-NPs and dibutyltin bioaccumulation in the gills, liver, and brain. The present study aims to provide a comparative study between CuO and dibutyltin (NPs) at a concentration to declare their deleterious effects on oxidative biomarkers of marine fish and the measurement of oxidative stress.