Study of concentration of organochlorine pesticides in Common carp (Cyprinus carpio) from Shadegan wetland

Increase of agricultural activity around the wetlands and use of Organochlorine pesticides in fields lead to widespread contamination of the wetlands. Pesticides are lipophilic compounds with high persistence in the environment and are accumulated in food chain. Aquatic organisms especially fishes are one of the important routes for entrance of these compounds to human bodies. Fish is also a suitable indicator for the organic pollution monitoring in aquatic environment. In this research, concentrations of organochlorine pesticides in common carp (Cyprinus carpio) collected in Autumn of 1386 from the Shadegan wetland, were assessed using gas chromatography (GC). HCHs (5.81 ng/g ww) had the highest and dieldrin (0.24 ng/g ww) had the lowest concentrations among pesticides. Among DDTs metabolites p,p/-DDE (2.59 ng/g ww), among HCHs isomers α-HCH (5.37 ng/g ww) and among Heptachlors isomers Heptachlor (1.40 ng/g ww) had the highest concentrations. The mean concentrations of pesticides in common carp were below the pesticides standard levels determined by various organizations.