Growth and economic performance of Clarias gariepinus juveniles fed diets containing velvet bean, Mucuna pruriens, seed meal

Abstract

Clarias gariepinus was tested over 70 days to determine  their growth, nutrient and economic performance. The 25% fishmeal component of the  control diet was replaced with 5–15% raw or  processed mucuna seed meal and the fish were fed twice daily at 5% of their average body weight per day. The diet containing 5% raw mucuna seed meal resulted in the best specific growth rate (2.42% d^–1), feed conversion ratio (2.05) and protein efficiency ratio (1.34), as well as the highest net profit of US$0.065 per fish and the  best benefit-cost ratio of 1.32. The diet containing 15% processed seed meal produced the worst results. The processing of mucuna seed resulted in improved crude protein and ether extract and a 20% reduction in crude fibre.

Keywords: Clarias gariepinus; feed utilisation; plant protein; production cost

African Journal of Aquatic Science 2009, 34(2): 131–135