Effect Of Sublethal Chromium On Biochemical Constituents And Bio Accumulation In The Post Larvae Of Penaeus Monodon.

Abstract

Heavy metals occur naturally in the ecosystem with large variations in concentration. Living organisms require varying amounts of some heavy metals. Small amounts of these elements are common in our environment and diet and are actually necessary for good health, but large amounts of any one of them may cause acute or chronic toxicity. For some heavy metals, toxic levels the background concentrations naturally found in nature. Therefore, it is important to elucidate their impact on organisms and take protective measures against excessive exposure. As the coastal waters are frequently used by aqua farms coastal districts, it is proposed to undertake the present investigation on postlarvae of Penaeus monodon exposed to chromium. The objective of this study was to determine the effect of sublethal chromium concentrations on biochemical constituents and metal accumulation when subjected to sublethal chromium i.e. 1/5 ^th of LC₅₀[1.2056ppm]. The present investigation also reveals the marginal levels of safety for chromium i.e., 60.28 g/L using the PL of P. monodon and this is very much essential for future monitoring studies of metal contamination.