Acute Toxicity Of Heavy Metals (Cadmium Chloride, Chromium Trioxide And Lead Nitrate) And Their Effects On The Freshwater Prawn Macrobrachium Rosenbergii

摘要: The post larvae (PL) of Macrobrachium rosenbergii (2.5 cm and 0.15g) were subjected to static renewal type acute toxicity tests against cadmium chloride (CdCl2), chromium trioxide (CrO3) lead nitrate (Pb(NO3)2). 96 h LC50 values calculated be 58.93 +g/L, 2.08 mg/L 25.97 for CdCl2, CrO3 Pb(NO3)2 respectively. PL exposed the concentrations these heavy metals a period study their impacts on whole body basic biochemical constituents, such as total carbohydrate, lipid, protein amino acids, activities metabolic enzymes, glutamate–oxaloacetate transaminase (GOT) glutamate–pyruvate (GPT) activity enzymatic antioxidant, catalase. levels constituents found significantly (P<0.102 2 0.00) decreased in test prawns when compared with control. Among recorded impact contents was severe that had been followed by CrO3. These results indicated fact energy utilized mitigate toxic stress induced through metals. utilization percentage higher lipid carbohydrate protein. GOT GPT (P<0.020 decrease two more than GOT. presence disturbances prawn due metal toxicity. catalase elevated Such an elevation CdCl2 Therefore, elimination oxidative operation overall result this exposure lethal indicates under tried eliminate stress.