<![CDATA[The study was conducted in Fish Laboratory / College of Agriculture / University of Tikrit with theaim of investigating the effect of adding powders prepared from chicken meat and fish waste (mixedand carp) and added to diets on the performance of common carp Cyprinus carpio L. and the endemicbacteria in its intestine. 70 cuffs were used with an initial weight of 240 ± 1.60 g / fish and distributedrandomly into 7 treatments (diets) at the rate of two repetitions for each treatment (5 fish per repeater)in 14 glass basins with dimensions of 30 x 40 x 30 cm. 7 experimental diets were prepared close toeach other in protein and energy content. The parameters T1 included the commercial powder, T2 thepowder prepared from raw chicken waste, T3 raw mixed fish waste powder, T4 common carp fishwaste powder, T5 the chicken meat powder fortified with 1% lactic acid. , T6 fish powder mixed withlactic acid by 1%, T7 fish powder of common carp with lactic acid by 1%, the results of the statisticalanalysis showed a significant superiority (P≤0.05) for the parameters T5 and T7 in the percentage ofprotein and no significant differences in the percentage of fat were recorded for the treatments. T3, T4,T6 and T7, the treatment T4 recorded the highest percentage of humidity. The treatments T2, T3 and T5recorded the highest rates of protein percentage in fish bodies after the end of the experiment, and therewere no significant differences for the percentage of fat in fish bodies for the treatments T1, T2 and T4and it reached (4.20, 4.20 and 4.12%), respectively. Several bacterial strains colonized in fish gut wereisolated: 10 S.aureus isolates, 12 Aeromonas hydrophilia, 5 Aeromonas S isolates, 8 E.oli bacteria, 3Pseudomonas bacteria, 5 Bacillus isolates, 7 isolates. Flavobacterium isolates.]]>
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