The effect of supplementation of feed with exogenous enzymes on the growth of common carp (Cyprinus carpio)

Supplementary feed exogenous enzymes have improved the growth rates of various food animals. In thisresearch, the effect of Endofeed W, a multienzyme feed supplement, was investigated on the growth of carp.Accordingly, 134 fish (33.1 ± 0.8 g) were randomly allocated to 4 experimental groups. During the first stageof the experiment (10 days), groups 1-3 received 1, 2 and 3 g Endofeed W per kg diet, respectively. Thefourth group (control) received a placebo. All fish were weighed and redistributed for the second stage of theexperiment, during which the test groups received 0.25, 0.5 and 1 g Endofeed W per kg diet, respectively.During the first stage of the experiment, the multienzyme supplement reduced the fish weights, dosedependently, being statistically significant with the highest dose (P0.05). The feed conversion rates were evidently higher ingroups receiving Endofeed W. The present study suggests the enzyme supplement, Endofeed W, is not onlyineffective in improving the growth and feed conversion rates of carp, it may even exert negative effects withhigher doses.