This study has evaluated the effect of adding dried yeast and its by-products in diets for juveniles of Nile tilapia. It was used 144 juveniles of male tilapia (average weight of 52.1g) distributed in 12 fiberglass tanks (250L), in completely randomized design, composed by 4 treatments and 3 replicates. The fish were fed ad libitum, 2 times per the day during 60 days, with isoproteic (28% CP) and isocaloric diets (2.900kcal ED kg-1) with dried yeast of sugar cane (LI), disrupted yeast cells (LA) and yeast cell wall (PC) added in the ratio of 25% of the total crude protein, compared with a control diet (CO), without yeast addition. No significant differences were observed for feed conversion and proteic efficiency rate. However, the weight gain was better in the fish fed with diets LA (114.70g) and PC (131.03g), as well as in relation to the specific growth rate (LA=1.79 and PC=1.93%), crude protein in the weight gain (LA=14.45 and PC=15.62%) and body protein content (LA=14.89 and PC=15.67g 100g-1). The by-products, cellular wall and disrupted yeast cell of sugar can be used in diets for tilapia juveniles.
Oreochromis niloticus; sugar cane yeast; disrupted yeast cells; yeast cell wall; Saccharomyces cerevisiae
