Yeast single cell protein in the diet of Oreochromis niloticus (L) fingerlings: An economic evaluation

Abstract

Six isonitrogenous diets (30% protein) were prepared, D₀, D_IO, D₂₀, D₃₀, D₄₀ and D₅₀. Diet Do the control diet) consist of fishmeal as the protein source. Diets D₁₀ to D₅₀ had fish meal replaced systematically with yeast single cell protein (SCP) in the order 10, 20, 30, 40 and 50%, respectively. Trial feeding was carried out with these feeds on Oreochromis niloticus. The cost benefit evaluation of these diets was carried out. Result showed that the 50% yeast SCP substituted diet had the lowest profit index, the, least expenditure as well as the best sales, net profit and cost-benefit ratio.

Key word: microbial protein, Oreochromis niloticus, feeding, cost benefit, aquaculture.