Selection and genetic parameters of fish breeding and reproductive qualities of sturgeon species in closed water supply installations

Introduction. Over the past decades, commercial fish farming has experienced a rapid increase in production volumes, which is favorably reflected in economic profitability [8]. As production scales up, so does the likelihood that the industry will face new biological, economic and social challenges that could affect productive and sustainable fish production. Therefore, it is important that the industry strives to monitor and control the effects of these problems in order to avoid potential problems when scaling production. Fish populations continue to decline worldwide, signaling the need for new conservation initiatives for endangered species [10]. Over the past two decades, with the development of our understanding of fish biology and commercial fish farming, new strategies for managing fish genetics and reproduction have focused on the use of breeding methods. The development of breeding methods to propagate the most frequently farmed sturgeon species is of increasing interest among scientists, primarily as a means of increasing the production of marketable fish.

Object. Research was focused on breeding sturgeons (Russian sturgeon, Lena sturgeon, sterlet).

Materials and methods. The methodological basis of the research was the scientific developments of authors involved in genetics and breeding in the cultivation of sturgeon fish. The presented studies were carried out during the period of the Research Laboratory "Breeding of valuable sturgeon breeds" of the Volgograd State Agrarian University. The basis for conducting scientific research is an integrated approach to the problem under study, which consists in the use of analytical data from scientific literature, classical and modern research methods and comparative analysis, generalization with the calculation of basic statistical parameters.

Results and conclusions. The analysis of fish-breeding and reproductive qualities of sturgeons was carried out. All the described trends and expectations will provide new research that will be very useful for increasing the commercial production of sturgeon fish and their caviar. In addition, improved analytical tools will enable optimal protection and conservation of endangered sturgeon populations, especially based on valuable gene banks (live fish and cryopreserved sperm).

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