The present experiment was carried out at the hatchery of Arab Fisheries Company at Abbassa. Two experiments were conducted in the present study. The first experiment aimed to study the effect of flumequine on reproductive performance of Nile tilapia fish (Oreochromis niloticus) broodstock while the second experiment aimed to study the effect of flumequine on growth performance and feed utilization of Nile tilapia fry. The first experiment extended from 1st July 2003 and lasted 25 September of the same year. Four concrete ponds (3 × 10 × 1 m) were used and represented four treatments and each pond was stocked with 30 females and 10 male. The basal diet of broodstock fed commercial diet contained 32% crude protein at a daily rate of 5% of the total biomass. The experimental diets enriched by 0, 10, 14 or 18 mg flumequine/kg of total biomass/day (0, 570, 805 and 1030 mg/kg diet). Fish fed the diets twice a day (9:00 am and 3:00 pm) for 5 days and then fed the basal diets (0-flumequine). For the second experiment, eight fiberglaas tanks (180 l for each) were stocked by 800 tilapia fry (100 fry for each tank) and fed 40% CP diet contained the same flumequine doses used for broddstock (0, 10, 14 or 18 mg flumequine/kg of total biomass/day i.e. 0, 570, 805 and 1030 mg/kg diet).at a feeding rate of 20% of the total biomass for 28 days and then decreased to 10% of the total biomass (6 days/week) to the end of the experiment (75 days). The obtained results could be summarized as follows: |
