Effect of Dietary supplement with antibiotic and some natural products on performance of nile tilapia

The present study was carried out in three experiments at Fish ResearchCenter and Nutrition and Clinical Nutrition Department, Faculty of VeterinaryMedicine, Zagazig University, to investigate :-I- The effect of adding Distiller’s Dried Grains with Solubls (DDGS) asreplacement for soybean meal and yellow corn with and without additionof ginseng (phytoadditive) in the diet of Nile tilapia fingerlings on(growth performance, body composition, nutrient digestibility, economicefficiency and some immunological and blood biochemical parameters).2- The effect of dietary supplement with natural immunostimulants such aspropolis extract (bee glue) and olive leaves extract in the diet of Niletilapia fingerlings on (growth performance, body composition, nutrientdigestibility, economic efficiency and some immunological and bloodbiochemical parameters).3- The effect of dietary supplement with natural growth promoters ascombination of essential oils mix and prebiotics and combination ofsynbiotic and phycophytic substance in compare with antibiotic(Oxytetracyline) in the diet of Nile tilapia fingerlings on (growthperformance, body composition, nutrient digestibility, economicefficiency and some immunological and blood biochemical parameters).5.1. Experiment 1:-This experiment was designed to evaluate the effect of addingDistiller’s Dried Grains with Soluble, DDGS (20% and 30%) as replacement10 soybean meal and yellow corn with and without addition of ginseng, (0.1 %,lg/kg) as phytoadditives on growth performance, nutrient digestibility, someimmunological parameters and economic efficiency A total of 360 Niletilapia fingerlings with initial body weight of 18.55 ±O.91 g (mean ±SD) were