Study growth Cyprinus Carpio L.1758 fish reared in cages using local feed

Current study dealt with cultivation three different densities common carp Cyprinus carpio in floating cages in Euphrates River / south of Nasiriyah city in Al-Fadhliah district from 9/5/2021 to 2/5/2022 to obtain the best culture density per cubic meter. Three densities (- 75 fish | 3 m) were used, 1000 fish for the first treatment, 2000 fish for second treatment, and 3000 fish for the third treatment, with an average weight ranging between 104 + _2 for each treatment. One local diet was used for three treatments. The temperature during the experiment period ranged between -15 30 C, pH values ​​ranged from (7.5-805) and dissolved oxygen concentrations (Do) ranged from (705 - 1004) mg / liter, while salinity was (005 - 200) g / liter and light transmittance ranged from (27 - 31) cm.&nbsp