Результаты выращивания молоди тиляпии на продукционных комбикормах с добавлением антиоксиданта астаксантина

Abstract

One of the main stages of metabolism in the body is the digestibility and digestibility of feed nutrients, the ef-fectiveness of which to a certain extent depends on the use of biologically active substances in diets that have antioxidant properties and have a stimulating effect on vital body functions. An important criterion for choosing feed additives is their environmental safety. An ideal antioxidant should be easily absorbed by the body and prevent the formation of free radicals at physiologically significant levels. Therefore, the use of natural antioxidants, namely carotenoids, is of particular interest. Carotenoids play a different role in the metabolism of fish and are also pronounced antioxidants that protect the body from the action of free radicals. The experience of using the natural antioxidant astaxanthin in feeding tilapia juveniles is considered. Astaxanthin is a powerful antioxidant that has a huge impact on the functioning of all systems and overall health. But the practice of its use has not affected mass thermophilic aquaculture species, such as tilapia, whose muscle tissues and caviar are not stained under the action of astaxanthin, and its effect on the physiological status of fish, as well as antioxidant properties have not been studied. It was found that the addition of astaxanthin to the composition of production feeds at a dosage of 20.0; 30.0; 40.0 mg/kg allowed to increase productivity by 38.5; 30.1; 17.03%, respectively, and also had a positive effect on the physiological state of the fish. As a result, after feeding, the indicators of total protein in the experimental variants 1-3 were higher than the control group by 48.3; 41.6 and 31.6%, respectively. As a result of the analysis of the data obtained after the completion of experimental work, a significant increase in the level of hemoglobin concentration in experimental variants 1-3 was established by 1.2-1.3 times, respectively, compared with the control variant.