Evaluation of heavy metals (as and cd) contamination in the edible fish along karachi-makran coast

The aim of this paper is to measure the concentration levels of as and cd in edible fish from the area of karachi - makaran coast,pakistan. these two metals are very toxic with serious health effects. these metals are released directly through the industrial sewage into malir river and transferred to fish and then to human beings. it was observed that the high concentration of as in fish flesh samples were most probably due to the presence of significant amount of as in the industrial effluents discharged into the indus river. the fish of sporadic occurrence also exhibits variable cd concentrations in the flesh,which do not meet the standards of world health organizations. copyright 2013 zoological society of pakistan.