Bacterial diseases of salmon fish epizootically significant in St. Petersburg and Leningrad oblast (aeromonosis and psevdomonoz)

Abstract

The main risks in the artificial reproduction of aquatic biological resources are due to diseases of farmed objects. The most serious biological and economic consequences are associated with infectious - infectious and invasive diseases. In aquacul ture conditions, their flow differs in intensity and mass character, leading to significant losses. High planting density, poor-quality food, the accumulation of metabolic products in water reduce the resistance of fish and increase the likelihood of them becoming infected with pathogens of bacterial diseases. Infection occurs by direct contact, through infected eggs, water, food, equipment. Bacterial diseases are the most dangerous, as the conditions of the aquatic environment complicate the fight against them. Salmon is one of the most valuable species of fish. Biotechnology of their cultivation requires a lot of money, so it is important to prevent a decrease in the quantity and quality of products due to contamination of these fish with bacterial diseases