Researches of the microbiological preparation Vetom 3 made on the basis of Bacillus amyloliquefaciens in NPF «Research center» LLC, on the larvae of the Altai mirror carp received in the conditions of factory reproduction in the research center of aquaculture of NSAU are carried out. To achieve this goal, 2 experimental groups and 1 control group were formed from the larvae of the Altai mirror carp. In a production experiment investigated the effect of different doses 200 mg/kg diet and 300 mg/kg diet and patterns of use the preparation on the safety of the larvae, the absolute mass, relative and average daily gain. Immediately before use, the preparation was diluted in water and mixed with feed. The duration of the preparation was 12 days. The water temperature during the experiment period was in the range of 18,8–20,9 ˚С. All groups were kept in similar conditions. It was found that the probiotic preparation Vetom 3 contributes to the safety, average daily and relative growth of larvae the Altai mirror carp; the maximum safety data amounted to 97,7 %, absolute weight – 156,15 mg; average daily and relative growth – 10,99 mg and 6,07 %. These results were obtained when using Vetom 3 at a dose of 300 mg / kg of feed daily 1 time per day for 5 days, then a day later for another 7 days before the end of the experiment.

A resonant process of annihilation and production of high-energy electron-positron pairs in an external electromagnetic field is studied theoretically. This process is the annihilation channel of an electron-positron scattering. It is shown that the resonance in an external electromagnetic field is possible only when the certain combination of electron and positron initial energies is more than threshold energy. Also, the angle between initial electron and initial positron momenta directions must be small and satisfy the resonant conditions. This angle is determined by the high-energy of the initial pair and the threshold energy. An emerging electron-positron pair also flies out in a narrow cone along the direction of the initial pair and must be ultrarelativistic. For each fixed angle, energies of the final electron and positron can take from one to two values. It is shown that the resonant differential cross section can significantly exceed the corresponding Bhabha cross section without an external field.

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Studies were carried out to study the morphology of carp with a pug-shaped and normal developed head according to the main exterior indicators, the structure of the axial skeleton and the morphological indicators of the main blood-forming organs. Comparison of the exterior indicators of normal individuals of the carp with individuals with phenodovia «pug-shaped» revealed significant differences between them. Normal carps had an average body weight of 21,7 % more. Indicators of absolute body length, body length to the end of the scaly cover, body girth and body thickness in normal individuals are superior to those of pug-shaped carps. In pug-shaped carp, it was noted that the number of vertebrae in the caudal region of the axial skeleton is less than 4 %. The structure of the trunk and transitional section does not have significant differences. In pug-shaped individuals of carp, the heart and liver could not be measured, since the organs were deformed under the influence of freezing. The heart in normally developed animals had a mass of 0.48 ± 0.06 g. Gill stamens in pug-shaped specimens ranging from 37–51 – less than in normal carps. They have this figure in the range of 46–52 pcs. When measuring the bones of the skull, it was found that in all pug-shaped instances of carp from different bodies of water, there is a big difference in comparison with normally developed carps. Namely, the bone parasphenoid is shortened in relation to the vomer. Paired, these bones form the bottom of the skull and are in fused condition. Whereas in normally developed carps, the opener has a longer length than the parasphenoid. It is this anomaly of the bones of the skull that leads to the shortening of the snout in the fish.

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