Abstract:
The experiment was carried out a period of 45 days; from15 July to 2 September 2018. The experiment design in plastic aquarium was developed at the freshwater hatchery department of fisheries science and wildlife, to determine the effect replacement of fishmeal with water spinach in the formulation of diets for Nile tilapia fry (Oreochromis niloticus). Design 150 Nile tilapia fries (average weight 3.25 g) Fish were distributed in flow through system of 15 plastic aquariums each containing about 20 liters, acclimatized to the hatchery conditions for 3 days. Before the beginning of the experiment, weak and abnormal fish were excluded and the remaining fish redistributed on aquariums at 10 fries / aquarium. The experiment included 5 treatments with 3 replicated aquariums for each. Feeds The diets replacing 0, 25, 50, 75 and 100% of fish meal protein content T0 T1, T2, T3 and T4 respectively.
fish indicated that Absolute body weight (ABW), live weight gain (LWG), specific growth rate (SGR), Feed conversion ratio (FCR), Protein efficiency ratio (PER) and survival rate of Oreochromis niloticus decreased with increasing level of water spinach in diets. AWG was found 36.90, 36.60, 33.10, 29.40 and 24.30 for T1, T0, T2, T3 and T4 respectively. LWG the higher in T3 (8.43) and the lower in T0 (1.02). The higher FCR in T4 (3.10) and the lower in T1 (1.96). The data were analyzed by one-way analysis of variance (ANOVA) and LSD for significantly different means at a significance level of 0.05 using SPSS 16.
