Effectiveness of Allzyme SSF and Polizyme® multimix feed additives on Growth Performance, Feed Utilization and Immunological Parameters of Nile Tilapia (Oreochromis niloticus) Fingerlings

This study was carried out to analyze the potential benefits of some feed additives (Allzyme SSF (R) at levels, 1.0, 2.0 and 3.0 kg/ton) and (Polizyme (R) multimix FM at levels, 1.0, 2.0 and 3.0 kg/ton) in Nile Tilapia (Oreochromis niloticus) diet on growth performance, feed efficiency, body chemical composition, blood parameters and economical efficiency under Egyptian conditions. Three hundred and fifteen fingerlings of Nile Tilapia (O. niloticus) with average initial weight (8.5 +/- 0.5 g), were randomly distributed into 7 treated groups allotted into 21 glass aquaria (three replicates of 15 fish / each treatment). Each aquarium measured 60x 35x 40 cm(3) (84 Lt.). The fish were fed at 3% fish biomass throughout the experiment which went on for 12 weeks. The results revealed significant enhancements in growth and all feed utilization parameters in the prebiotic supplemented groups. The diets containing Allzyme SSF (R) (0.1%) and Polizyme (R) multimix (0.1%) showed the highest growth and protein utilization parameters values. Experimental fish carcass composition was generally influenced by the different dietary treatments. The hematological, biochemical and immunological parameters of the experimented groups indicated critical increase in Allzyme SSF (R) and Polizyme (R) multimix treated groups. The obtained outcomes cleared that Allzyme SSF (R) and Polizyme (R) multimix at levels of 0.1% could be used in Nile tilapia diets without negative impacts on growth, feed utilization, blood and immunological parameters. Subsequently, Allzyme SSF (R) and Polizyme (R) multimix could be added to commercial diets to improve tilapia fingerlings production and immune response.