| Summary: | The results of experimental work on the treatment of beluga caviar with solutions of chemicals (0.9% sodium chloride, 0.05% hydrogen peroxide, 0.5% “Monclavit-1”, 0.01% “Iodinol”, 0.5% tannin), conducted with the aim of suppressing the growth and development of micromycetes sem. Saprolegniaceae, causing the disease of fish saprolegniosis. Saprolegnium micromycetes, affecting eggs during incubation, juveniles and adult fish, cause enormous damage to fish farms. Treatment of this disease is very difficult due to a number of restrictions imposed on the use of veterinary drugs in aquaculture. Evaluation of the effectiveness of the use of chemical solutions and their effects on the embryonic development of beluga (Huso huso) and the degree of infection of embryos with sem micromycetes. Saprolegniaceae was carried out according to fish-breeding and biological indicators (the proportion of fertilized eggs; the proportion of embryos infected with saprolegnium mycomycetes; the proportion of developing embryos; the number of abnormally developing oocytes and the proportion of hatched pre-larvae) at certain stages of development. Experimental work was carried out in production conditions in the incubation apparatus “Sturgeon” under optimal hydrochemical conditions for the development of beluga embryos. The experimental groups corresponded to the experimental concentrations of solutions. The most effective solutions that have an inhibitory effect on the growth and development of sem micromycetes. Saprolegniaceae, is a 0.05% solution of hydrogen peroxide with an exposure of 10 minutes and a 0.9% solution of sodium chloride with an exposure of 3 minutes. These solutions of substances suppressed the growth of saprolegnium micromycetes without adversely affecting the embryogenesis of beluga.
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