كلية الزراعة

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    The Effect Of Vitamin C On The Growth Performances Of Tilapia
    (AL-Neelain University, 2018) Abd alhlim Abd alla Zakaria Abd alla
    This study was conducted to evaluate the effect ofvitamin C (Ascorbic Acid, AA) on growth and feeding parameters, carcass composition and survival rate of Tilapia ( Oreochromis niloticus ). The experiment was conducted in the fish farm of faculty of Agricultural technology and fish sciences, Department of fish sciences, Al Neelian University, during (january to May 2017). Four semi purified diets supplemented with 0 (control treatment), 50, 100, and 150 vitamin C mg/kg/diat (treatment /\, B, C and D respectively) dry diet that were fed to tilapia fry (3.96g) in triplicate groups. At the end of the experiment, growth and feeding parameters, carcass composition and survival rate of fries were evaluated. The results indicated that there are increasing in the weight gain rate (11.70, 11.40, 11.50, and 12.80)g, respectively, for fish fed diets O, 50, 100, and 150 vitamin C mg/kg. There was no statistical difference in Feed conversation ratio (FCR), Wight gain (WG) and other performance (p20.05). It was observed significant difference in survival rate between the control treatment and the other treatments and there is other difference in carcass composition between the control treatment and other treatments (pZ0.05). The fish fed diets with out vitamin C it was observed some deficiency symptoms, scales erosion and caudal fin erosion. We recommend the dose of 150 mg kg-l of vitamin C to the dict 0| Nile tilztpia, which indicated high growth rutc (12.80g).