RESEARCH ON THE EFFECTS OF FEED BIO-ADDITIVES (ACTIGEN, SELPLEX, YEA-SACC-1026) ON GROWTH INDICES AND BLOOD SAMPLES IN THE SIBERIAN STURGEON (ACIPENSER BAERII)

The research has tracked the effects of Actigen, Sel-Plex and Yea-Sacc-1026 fodder bio-additives on growth and blood indices in the Siberian sturgeon (Acipenser baerii). The experiments were carried out on a number of 108 sturgeons distributed in four groups, each group with 27 sturgeons/ group. Experimental group 1 was fed with the combined Actigen feed in a proportion of 0.08%, 0.03% Sel-Plex was added to the experimental group 2, and 0.2% Yea-Sacc-1026 was added to the third experimental group. The experimental period lasted 23 weeks, from 25th of May – 2nd of November 2017. During the experiment, the body mass, growth rate, feed consumption, total biomass and survival rate were followed. Body weight at the end of the experimental period has increased by 24.8% for experimental group 3 (0.2% Yea-Sacc) compared to the control group. Concerning the final biomass there is an increase in experimental group 3 (0.2% Yea-Sacc) compared to the control group of 29.51%. Growth evolution shows an increase of 90.15% in experimental group 3 (0.2% Yea-Sacc) compared with the control group. The effects of bio-additives on the mortality rate were positive in the experimental groups, with no loses. Regarding to blood indices, the following were observed: the hemoglobin concentration did not show significant differences in the experimental groups compared to the control group. The correlations between blood indices and erythrocyte ratios revealed an anemic syndrome in the control group. The hematocrit value was improved in experimental group E1 (36.6% Actigen) and showed very significant differences when compared with the control group; Significant differences were also recorded between the experimental groups E1 and E2 (Actigen and SelPlex) compared to the experimental group E3 (Yea-Sacc), the latter showing lower values than the rest of the groups (24.6%).