Effect of partial and complete replacement of fish meal by feather meal in diets on the performance and body composition of tilapia nilotica [oreochromis niloticus]

ABSTRACT

The purpose of the work was to find out the most suitable inclusion rate for feather meal in economical practical diets for Tilapia nilotica. Sixty-nine T. nilotica of nearly similar weight [ca. 25 g] were divided in five glass aquaria and fed on five different diets containing constant percentages of wheat bran [45%] and layer ration [15%], but varying percentages of fish meal, and feather meals as follows 40 0, 30 10, 20 20, 10 30 and 0 40 for aquaria I, II, III, IV and V, respectively. The experiment was terminated after 18 weeks