Comparative Acute Toxicity Of Chlorpyrifos-Ethyl (Organophosphate) And Lambda-Cyhalothrin (Pyrethroid) To The African Catfish (C. gariepinus) Using Some Biochemical Parameters

Abstract

The impact of short-term exposure to waterborne chlorpyrifos-ethyl and lambda-cyhalothrin on Clarias gariepinus was evaluated through changes of selected biochemical parameters. Fish was exposed to 0.64 mg/l, 0.80 mg/l, 0.96 mg/l, 1.12 mg/l, 1.28 mg/l of chlorpyrifos-ethyl, and 0.008mg/l, 0.009mg/l, 0.010mg/l, 0.011mg/l, 0.012mg/l of lambda-cyhalothrin and control for 96hrs. The 96-h LC50 value for C. gariepinus was estimated as 0.92mg/l and 0.008mg/l for chlorpyrifos-ethyl and lambda-cyhalothrin respectively. The parameters measured were serum glucose, protein, cholesterol, triglyceride, glutamic pyruvic acid transaminase (GPT), glutamic oxaloacetic acid transaminase (GOT) and alkaline phosphatase (ALP).There was significant (P<0.05) alterations between the control values and the exposed groups on all parameters. Chlorpyrifos-ethyl was more toxic to the fish than lambda-cyhalothrin.

Keywords: Chlorpyrifos-ethyl, Lambda-cyhalothrin, biochemical parameters, C. gariepinus, acute toxicity

Global Journal of Pure and Applied Sciences Vol. 14 (3) 2008: pp. 263-270