THE EFFECT OF SACCHAROMYCES BOULARDII YEAST FEED SUPPLEMENTATION ON GROWTH PARAMETERS AND BIOCHEMICAL COMPOSITION OF CARP (CYPRINUS CARPIO)

Viorica Savin, N. Patriche, Elena Mocanu, Magdalena Tenciu, Marilena Lăcătuş, D. Popa, C. Savin

Abstract
   The aim of this study is to evaluate the effect of the yeast Sacharomices Boulardii (SB), on the growth performance, the health and the survival rate of the carp (Cyprinus carpio) grown in recirculating system, by analyzing the biotechnological and biochemical indicators.
   The experiment was performed over a period of 30 days. The biological material used in this experiment was carp (Cyprinus carpio). A number of 150 fish, with an average body weight of approximately 100 grams, were equally distributed in 2 experimental tank and 1 control tank in the recirculating system. The yeast was supplemented with food, in a classic feed with a content of 32% protein, according to the specialized literature (SC Aquasarb, 1998)[15], in percentage of 0.75% in B1, respectively 2.5 % in B2. In the control tank, B0, a classic feed was administered, without the addition of yeast. The growth parameters and the biochemical composition were determined at the beginning and the end of the experiment. The results showed that there are not very big differences regarding the individual weight growth between the 3 tank; however, the highest weight gain (33.95 g) was obtained in B2 compared to the lowest (33.51 g) obtained in the control tank, B0. The results also showed that at the end of the experiment the survival rate in B1 and B2 was 100%, compared to 96% in the control basin B0. A better food conversion rate, FCR, was obtained in B2 (1.20), compared to 1.30 in B1, respectively 1.45 in B0. The highest protein content in the fish carcass was present in B2 (18.01%), compared to 17.01 in B0, respectively 17.60 in B1.
   The conclusion is that supplementation of the carp feed grown in the recirculating system with probiotics from yeast Sacharomices boulardii has positive results on the growth performance, the health and the survival rate of the carp, the best results being obtained with a supplement of 2.5% probiotics.

Key words: yeast, growth parameters, biochemical composition, Cyprinus carpio