Abstract
A bioassay test was performed on the toxic effect of Cassava Mill Effluent to the African Catfish - Heteroclarias Hybrid of Heterobranchus bidorsalis (Male) and Clarias gariepinus (Female). The 96-h LC50 was determined as 50. 12 mgl -1. Exposed fish became darker in colour and showed signs of respiratory distress, increased opercular movement were observed before death occurred. The toxicological implication of this findings in relation to environmental pollution is discussed herein. Key words : Acute Toxicity, Cassava Mill Effluent, African Catfish Journal of Aquatic Sciences Vol.17(1) 2002: 31-34
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