Effect of supplementary Multi-Behzim on metabolic growth rate, some nutritional parameters and carcass composition of rainbow trout (Oncorhynchus Mykiss) Juvenile

This study was carried out to evaluate the effect of different levels of Multi-Behzime on growth performance and proximate composition of rainbow trout (Oncorhynchus mykiss) juvenile. A total of 600 specimens with mean weight (±SD) of 18±2 gr were stocked as 50 fish per treatment in completely random design with four treatments each in in three replicates. Experimental diets containing four levels of the Multi-Behzim i.e. 200, 400 and 600 mg.kg-1 with a control fed for 45 days. The results showed no significant (P>0.05) differences in growth performance and feeding efficiency of fish fed with the experimental and control diets. Whereas whole body chemical composition of O. mykiss juveniles revealed significantly (P<0.05) lower moisture (70.23±0.11) and total ash (2.25±0.08) as well as higher crude protein (19.47±0.24) and crude lipid (7.56±0.10) content in 600 mg.kg-1 treatment. It could, therefore, be concluded that 600 mg Multi-Behzime enzyme per kg of diet can improve carcass quality of O. mykiss juvenile.