Abstract
Study was planed to compare different types of probiotics in two level used in Cyprinus carpio L. fish ratios for studying it's effect on growth and food utilization criteria. A same ration was fed for 84 days to nine groups (15 fish/each) with initial weight 22.44 ± 2 gm/fish and the intact ration was fed to the 1st fish group as a control. The biomin imbo probiotic was added 1and 2 gm/1kg ration for the 2nd and 3rd fish group. 0.5 and 1 gm of the poultry star®me per 1kg ration the 4th and 5th fish group. The ration of the 6th and the 7th fish group included 6 gm and 8 gm of the Iraqi probiotics. 3 and 5 gm of the commericial dry yeast was added to the 8th and 9th fish group ration respectively. All the probiotic supported ration fish groups gave special poultry star®me on level added 0.5 gm/1kgsignificanthigher (p<0.05) body weight gain, growth rate, relative growth rate, specific growth rate, feed conversion ratio, feed efficiency ratio, protein efficiency ratio and protein productive value than the control fish group.
