The effect of using three different levels of Fish Meal on growth criteria and feeding efficiency in Cyprinus Carpio.

Abstract Study the effect of three different levels of adding a fishmeal protein concentrate on the growth rates of the common carp fish (Cyprinus carpio) through laboratory experiments, which lasted for 40 days. 27 common carp fish were used with a weight of 2 ± 93.27 g and distributed over 9 concrete ponds with a capacity (300) liters, according to three treatments T1, T2, and T3 distributed in three replicates for each treatment, and put 9 fish (3 fish / repeated). The fish were fed on three different diets, with a protein concentrate ratio of 23%, 15% and 10%, respectively. Measurement of weight, relative specific growth rates and food conversion rates. The best total weight gain increase for the second treatment was recorded (35.478 ± 2.29 g). The best relative growth rates were (37.769 ± 2.51) and specific (0.346 ± 0.02)% g/day and protein efficiency ratio ( 2.365 ± 0.23) for the second treatment also, and significant differences were recorded at (P <0.01) on the two treatments T3; T1 in all the studied characteristics.