Technological elements Lena sturgeon fingerlings cultivation in Belarus | Технологические элементы выращивания молоди ленского осетра в условиях Беларуси
2013
Usova, O.V., Belarus State Academy of Agriculture, Gorki (Belarus)
For industrial cultivation of the Lena sturgeon reception durable young fish is necessary. Growing up the sturgeon to weight 2-3 g is a necessary stage because the not growing up young fish at release in natural reservoirs influence of famine and press of predatory organisms does not maintain. The results of the studies helped to identify technological parameters for rearing Lena sturgeon larvae to weight of 3.2 g in conditions of Belarus. It was determined that the most cost-effective are the stocking density of 6 thousand ind./m2at standing and a 2.0 ind./m2 at switching Lena sturgeon larvae to artificial feed. In this case survival is high and the number of production areas is greatly reduced. The survival rate in this variant on 4,2% above the control also makes 64,6%, but for keeping larvae it is required to the area on 50% less. Stocking density of 0.7 thousand ind./m2 when rearing young Lena sturgeon to a viable stage can be taken as a pre-regulatory baseline. Deterioration of temperature, oxygen and active modes of reaction pH medium In addition to reducing the rate of growth and survival, can cause a variety of diseases and mass mortality of fish. On the basis of lead researches in skilled fish facility "Selets" and the normative-technological documentation on growing up the Lena sturgeon in the Russian Federation technological parameters of keeping larvae prior to the beginning of the mixed feed, and larvae transfer on artificial forages and preliminary technological parameters of Lena sturgeon young fish growing up to weight 2-3 g in conditions of fish-breeding facilities of Belarus offered
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