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The effect of the toxicity of crude oil were investigated in the laboratory using Bonny light crude oil and Sarotherodon melanotheron species from brackish water collected at Eagles Island, Port-Harcourt, Rivers State. Triplicates of 0.01(ppm), 0.005(ppm), 0.01(ppm) and 0.02(ppm) concentration of crude oil in brackish water were made in aquaria where Sarotherodon melanotheron species were kept. Soluble water fraction (SWF) of Bonny light crude oil were total hydrocarbon 0.30±0.02, dissolved oxygen (DO) 9.50±0.01, biological oxygen demand (BOD) 8.40±0.05, chemical oxygen demand(COD) 1.19±0.02, pH 6.60±0.01, and that of brackish water were dissolved oxygen (DO) 2.03±2.43. biological oxygen demand (BOD) 1.09±1.69, Lethal concentration of crude oil on the fish samples (LC50) was 0.01(ppm). Bonny light crude oil is toxic to Sarotherodon melanotheron and consequently to the environment.

Acute Toxicity Effect of Bonny Light Crude Oil on Sarotherodon melanotheron (Black Chin Tilapia)