Abstract
A growth experiment was accomplished to study common carp nutritional effect on three traditional diets differs from its crude protein contain (25%, 30% and 35%). This experiment was carrying out in fish breeding project in the Agriculture and forestry college, Dohuk University in Summel city. Common carp of 150±5.20 g body size were stocked in cages each having 1m¬¬3 size and were fed frequently for 90 days. Results show that the highest growth performance were obtained with 30% protein diet while the poorest one was obtained with 25% protein diet. FCR ranged from 2.27 to 3.01.While the lowest Protein efficiency ratio were obtained when feeding fish on the diet protein have 35%cp.
