Author(s): MM Babatunde and AY Idris

Abstract: The acute toxicity test of Lead to Clarias gariepinus juveniles and the rate of bioaccumulation absorbed in the muscles and intestine of Clarias gariepinus juveniles was investigated using the Standard Methods Bioassay by APHA. In this study, the LC₅₀ values of Clarias gariepinus at 96h period was determined to be 50.12mg/ L. Results obtained from this study showed that lead (Pb(NO3)2) was bioaccumulated at slower rate in the organs of the Clarias gariepinus juveniles because of the time of exposure (96hrs) but it shows extensive histological changes in the muscles rather than the gastrointestinal tract exposed to the various lead concentrations of 100mgL^-1, 75mgL^-1 and 50mgL^-1. The lead concentration disturbed the homeostasis and led to physiological disorders in functions of opercular ventilation, tail bat movement and general behavior and subsequently led to the death of the juveniles Clarias gariepinus.

Pages: 350-356  |  1294 Views  238 Downloads

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