Determination of Hg, Pb, Zn, Cu in muscle and liver of tissue of European Perch (Perca fluviatilis) in areas of Abkenar and Sheyjan of Anzali Lagoon in spring

Anzali Lagoon is one of the most important aquatic ecosystems of Iran located in south-west of the Caspian Sea. This Lagoon is a habitat for valuable fishes and aquatic animals which have an important role in life cycle of this ecosystem.
In this study, sampling from European perch (Perca fluviatilis) was conducted in two areas of Abkenar (from western basin of the Anzali Lagoon) and Sheyjan (from eastern basin) in spring 2008. The aim of this investigation was to determination of heavy metals (Hg, Pb, Zn, Cu) in muscle and liver of Perch.
9 specimens of perch (1- +2 years) were sampled and transferred to laboratory for relevant analyses. During this investigation, the results in these areas were compared. The results showed that in muscle and liver of samples in Abkenar Cu determination 1.74 and 10.43 µg per gr wet weight, respectively, Pb determination was 0.68 and 1.82 µg per gr wet weight, Zn determination was 6.84 and 25.27 µg per gr wet weight and Hg determination was 0.013 and 0.024 µg per gr wet weight.
Also in muscle and liver of samples in Sheyjan Cu determination was 1.23 and 8.72 µg per gr wet weight, respectively, Pb determination was 0.43 and 1.24 µg per gr wet weight, Zn determination was 5.32 and 21.36 µg per gr wet weight and Hg determination was 0.024 and 0.031 µg per gr wet weight. Results revealed significant difference using t-test between determination of heavy metals ( Hg, Pb, Zn & Cu) in muscle and liver tissue samples of the two areas(p<0.05).