Monitor the Median Lethal Concentration (96 Hours) of Cadmium and Lead in Meretrix casta

Metals are essential for animal life and physiological functions. Some metals are essential elements required by humans, and most metals are used in electrical and electric equipment, cars and catalysts. The heavy metals can enter the bodies to a small extent via food, drinking water and air. The excess quantities of heavy metals are detrimental as these destabilize the ecosystems because of their bioaccumulation in organisms, and elicit toxic effects on biota and even death in most living organisms In the present study was done to find out the impact of cadmium and lead in M. casta within a short period. In the present investigation LC50 value of cadmium is higher than that of lead. It is suggested that the toxicity response may vary from species to species.