Sublethal Effect of Methanol Leaves Extracts of Khaya Senegalensis on Growth and Food Utilization of the African Catfish Clarias Gariapenius

O. A. ABUI1 and M. M. MATOUKE2
1 Federal Science and Technical College, Kafanchan, Kaduna State, Nigeria
2 Federal University, Department of Biological Sciences, Dutsinma, Katsina, Nigeria, PMB 5001, Department of Biological Sciences


ABUI, O. A. and M. M. MATOUKE, 2016. Sublethal effect of methanol leaves extracts of Khaya senegalensis on growth and food utilization of the African Catfi sh Clarias gariapenius. Bulg. J. Agric. Sci., 22: 1006–1009

The effect of sub-lethal concentrations 39.93 mg.L-1, 19.97 mg.L-1 and 9.98 mg.L-1 of methanol leaves extract of Khaya senegalensis on growth and food utilization were investigated on juveniles’ African catfi sh, Clarias gariepinus for a period of five months (February-June 2015). The growth rate was signifi cantly reduced (P < 0.05) in fish exposed to the methanol extract K. senegalensis compared with the control group. Nutrient utilization showed that, specifi c growth rate (SGR), Feed conversion ratio (FCR), Gross feed conversion efficiency (GFCE), Feed effi ciency (FE), protein effi ciency ratio (PER) and Nitrogen metabolism (NM) were signifi cant (P < 0.05) in the control fi sh compared to the exposed fish. Similarly, the percentage crude protein and oil content were signifi cantly higher (P < 0.05) in the control than the exposed. The study revealed that K. senegalensisaltered the growth and food utilization of C. gariepinus. Therefore the monitoring of K. senegalensis near productive aquatic ecosystems is recommended.

Key words: Khaya senegalensis, sublethal toxicity, growth, Clarias gariapinus

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