Natural ceolites in the productive diets for sturgeon fish

The goal of the work was to study the piscicultural biological and physiological reasoning of using the natural ceolites of Kammenoyarskyi field in the Astrakhan region in the composition of productive diets for sturgeons (by the example of yearlings of hybrids of Russian sturgeon and Lenskiy sturgeon). The hybrid of Russian and Lenskiy sturgeon is enough perspective for rearing in industrial conditions because of its high biological flexibility and exterior properties. It has shown good results as an object of commercial farming in world scale alongside the traditional sturgeon species. While establishing the volume of adding the ceolites into the diet the previous data, received during the rearing of bester, carp and trout, have been taken into account. The effectiveness of these rations has been assessed by piscicultural (growth rate, coefficient of weight storage, survival rate etc.) and physiological properties (red and white blood). As a result of the investigations the possibility of using 3 and 6 % of natural ceolites in the composition of productive sturgeon diets has been stated. It has been revealed that introduction of ceolites into the diet has positive effect on the figures of growth rate of hybrid’s fry and its physiological state. Absolute gain of fry for the period of rearing in the test reservoirs with 3 and 6 % of ceolites in re-spect to control was equal to 114.4 and 105.2 % accordingly. The survival rate was 100 % in all variants.