Abstract
The work is devoted to the development of a mathematical model that allows one to determine the electromagnetic fields of the microwave range inside sturgeon whitebait in order to stimulate their development. Our chosen method of calculating the mathematical model of internal electromagnetic fields in fish whitebait is planned to be used in the future for the experiment. This will increase the viability of whitebait as well as further healthy growth of sturgeon small fish and the selection of the best individuals for further artificial reproduction. A literature analysis of the influence of electromagnetic radiation on aquatic organisms and living organisms has been carried out. The effect of electromagnetic radiation on sturgeon whitebait in the first two weeks of their development is considered. In this case, the problems are solved using integro-differential equations in the case of quasi-statistics. A distinctive feature of this method is that it automatically satisfies the boundary conditions on the surface of the element. The solution of the problem of determining the electromagnetic fields inside the fish fry will be carried out taking into account its small size in comparison with the length of the falling electromagnetic radiation. In our case, as the larva grows, its size increases and the zero approximation give a rather crude result. Suggested expressions for zero, first, second, etc. approximations. Its allow take into account the growth of whitebait and the change in the ratio between their size and the incident wavelength. At the same time, it should be noted the high accuracy of this method, since already in the zero approximation its error did not exceed 15% in comparison with experimental studies of the scattering of electromagnetic fields on metal objects of ellipsoidal shape.
Highlights
In recent years, due to a significant decrease in the fish stocks world's oceans and, the volume of its catch, the development of various forms of aquaculture is becoming more widespread
Literature review As a result of many years of functional and applied research, a scientifically grounded basis has been laid and approaches have been determined to implement the stimulating effect of low-intensity electromagnetic radiation on fish-biological and economically useful qualities of sturgeon planting material because of the effect of this radiation to fish embryos and sperm
The purpose of our study is to study the effect of electromagnetic radiation on sturgeon juveniles at the first stages of development
Summary
Due to a significant decrease in the fish stocks world's oceans and, the volume of its catch, the development of various forms of aquaculture is becoming more widespread. Namely: various pharmacological additives to stimulate growth, changes in the composition of feed, low-intensity laser radiation, helium-neon lasers, stocking density, changes in temperature, oxygenation of water, and others It was shown there that the efficiency of such production significantly depends on the biotropic parameters of this radiation This indicates the possibility of its use in the technology of artificial reproduction and rearing of valuable fish species [1, 2]. Many studies have noted the positive effects of extremely high-frequency radiation on various living objects and studied various physiological effects caused by extremely high-frequency radiation These are acceleration of growth and increase in biomass, intensification of photosynthesis, accompanied by increased oxygen and content in photosynthetic cells, organic compounds in the environment, changes in the reactivity of exometabolites, changes in ion transport, and others. The most important parameter that determines the magnitude of the stimulating effect is the radiation frequency, the EMR power density and the type of its modulation [6, 7]
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