Bioflavonoids in production of fish feeds

Modern technologies of industrial fish farming allow us to obtain high-quality products. However, stressful conditions of the artificial ecosystem (high stocking density, violation of optimal hydrochemical conditions) they can negatively affect food activity, growth rate, lead to the development of alimentary diseases and depletion of antioxidant potential. In conditions when the fish is deprived of natural food, and the metabolism is completely under human control, the use of balanced feeds enriched with macro-and microelements, as well as biologically active substances, ensures metabolic processes to the maximum extent and contributes to increasing the growth rate and obtaining physiologically complete juveniles. The use of antioxidant feed additives allows not only to carry out timely therapy, but also to provide a preventive effect to prevent the negative consequences of the artificial ecosystem. Currently, there are a number of anti-oxidant feed additives, among which natural bioantiooxidants of flavonoid nature, such as catechins, dihydrochalcones, flavonols, leukocyanins, dihydroquercetin, are of particular interest. The article discusses the experience of using a new generation antioxidant-dihydroquercetin and an immunostimulator-arabinogalactan in feeding a tilapia hybrid (Oreochromis mossambicus×Oreochromis niloticus). It was found that the addition of dihydroquercetin (25.0-50.0 mg/kg) and arabinogalactan (50.0 mg/kg) to the composition of production feeds allowed to increase productivity by 26.0 %, as well as to have a positive effect on the physiological state of fish. The obtained results complement the existing ideas about the fields of application of antioxidants, and also prove the prospects of using herbal products as antioxidant feed additives.