PROBLEMS OF BREEDING OF STURGEON LARVAE AND FRY UNDER INTENSIVE AQUACULTURE CONDITIONS AND WAYS OF THEIR SOLUTION
We have analyzed and compared results of feeding bester larvae and fry by a traditional technology where feeds are used with a higher proportion of monomeric forms, and a novel technology, developed by us, with two-level feeding. The new technology involves the replacement of a starter feed which is used in the first feeding by the feed in which polymeric forms of nutrients with higher molecular weight predominate and age-related changes in the enzyme-secreting system of the digestive tract are taken into account. The following factors have been considered: growth rate, survival, fatness, feed costs, lipid and energy metabolism, antioxidant properties. As a result of growing it is determined that a timely change of feeds enhances the productivity and viability of juveniles and can be a significant source of increasing survival, good physiological and biochemical status and fish health during ranching and commercial breeding.