Determination of heavy metals level in Mugil cephalus and Clarias lazera fishes

Abstract

Market fish samples revealed that the percent of samples exceeded the permissible limits for Hg, Pb and Cd that established by ESQC (2010) were 35, 20, 20% and 65, 55 and 60% for Mugil cephalus and Clarias lazera respectively. Even though, fish samples were collected from captures showed that the percent of samples exceeded the safe permissible limits were 30, 20, 20% and 50, 40 and 60% for Hg, Pb and Cd residues of Mugil cephalus and Clarias lazera respectively. The results also showed that the percent of farmed fish samples exceeded the safe permissible were 30, 0, 10% and 70, 40 and 60% for Hg, Pb and Cd residues of Mugil cephalus and Clarias lazera respectively. Determination of Zn concentration in different fish samples were collected from different sources revealed that all fish