Effects of feeding ratios (3%, 5% and 7%) on growth and food conversion rate (FCR) of common carp Cyprinus carpio reared in floating cages at Shatt Al-Arab River, Hartha district were studied during a period of 27-4-2010 to 28-6-2010. Statically analysis of results proved that there were significant differences between final weight and length reached by fishes fed on 3% of fish weight and fished fed on 5% and 7% of fish weight. Final weights of fishes were (188, 275.8 and 252.6) g and final lengths were (216.6, 234.6 and 227.2) mm for (3, 5 and 7)% feeding ratio respectively. Better results of growth and FCR obtained from fishes fed 5% of fish weight. Results appeared that FCR values were 4.82, 2.63 and 3.98, daily growth rates were (1.07, 3.16 and 2.78) g/day and specific growth rates were (0.7, 1.85 and 1.71) %/day for fishes fed 3, 5 and 7% of fish weight respectively.
This study was conducted to determine the influence of oil sources on growth performance of fish common carp Cyprinus carpio. Four diets were formed which similar in their protein content and contains four different sources of oil which [Corn oil (A), palm oil (B), sunflower oil (C) and fish oil (D)] 64 fish average weight ranged between (1.598 - 1.544) g were distributed randomly on eight plastic circular form basins with capacity of 20 liters of water. Feeding fish have been tested diets on the rate of 5 % of body weight by repeating each treatment for a period of 42 days. The results showed that there is no significant difference between the treatments (p>0.05) in the values of the final weight, specific growth rate, relative growth rate and food conversion rate. As the weight increase was no significant differences (p>0.05) between treatments (A, B, C), the treatment D (fish oil) was better than treatments (B, A) with significant difference (p<0.05) and did not different.
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