EFFECT OF HYDROYEAST AQUACULTURE ® AS GROWTH PROMOTER FOR ADULT NILE TILAPIA Oreochromis niloticus

The objectives of the present study were to evaluate the effects of graded levels of a new commercial probiotic Hydroyeast Aquaculture ® (0, 5, 10 and 15 g/Kg diet) on both sexes of adult Nile tilapia Oreochromis niloticus , referred to treatments No. T 1, T2, T 3 and T 4, respectively, for males and T 5, T 6, T 7 and T 8 treatments for females, on their growth performance, feed and nutrients utilization and carcass composition for 8 weeks. The obtained results showed that tested probiotic at level of 15 g /kg diet (T 4) and 10 g /kg diet (T 7) for adult males and females O. niloticus respectively, significantly (P � 0.05) enhancing fish growth, feed intake and nutrients utilization, as well as realized slight improving of fish carcass composition. Hence, it could be concluded that Hydroyeast Aquaculture ® probiotic is useful at levels of 15 g /kg diet (T 4) and 10 g /kg diet (T 7) for enhancing production performance of adult males and females Nile tilapia (O. niloticus ) respectively, so may be using of this probiotic led to economic efficiency especially, for fish farming and hatcheries.