author(s)
Hadi H Abed Ali and Jamal KA AL-Faragi

abstract
The present study was aimed to evaluate the efficiency of betaine and 0.2% β-glucan on growth performance and survival rate of common carp. 120 fingerlings of Cyprinus carpio weight ranged between 46-46.5g were randomly distributed into six treatment groups. Fish were fed different betaine concentration: 0.15% (T1), 0.2% (T2), 0.25% (T3) and 0.3% (T4). The fifth group (T5) was fed 0.2% β-glucan, control group was fed 0% of betaine and β-glucan in the diet. All treatments fed twice a day at rate 3% B.W for 56 days. The study was conducted at College of Veterinary Medicine/ University of Baghdad, Ichthyology laboratory, Baghdad, Iraq, from 27/4/ to 21/6/2016.