Influence of the antioxidant astaxanthin in the composition of feeds on the physiological state of heat-water objects of aquaculture

Abstract

This scientific study examines the experience of using astaxanthin in tilapia feeding, and its effect on the physiological state of individuals. The work used a set of methods used in fisheries research — variation statistics and physiological and biochemical tests. The reliability and validity of the scientific provisions and conclusions contained in this work are determined by a significant amount of factual material; in total, 150 tilapia individuals were studied. The data obtained during the study indicate that the use of astaxanthin at a concentration of 20.0; 30.0; 40.0 and 50.0 mg gives the best physiological and biochemical parameters of cultivated individuals, in comparison with the control variant. However, taking into account the maximum input of astaxanthin in feed for warm-water fish species, the most effective and safe concentration of astaxanthin in the diet of warm-water aquaculture objects is 40.0 mg/kg of feed, which is also confirmed by the results of the physiological state of individuals obtained during the experiments. One of the main stages of metabolism in the body is the digestibility and assimilation of feed nutrients, the effectiveness 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 the vital functions of the body. An important criterion for the choice of feed additives is environmental safety. As a result, after feeding, the indicators of total protein in the experimental variants (1, 2, 3 and 4) were higher by 27.8; 58.5; 59.5 and 52.2%, respectively, of the control group. Analyzing the data obtained after the completion of the experimental work, a significant increase in the level of hemoglobin concentration in the experimental variants was found to be 1.2–1.3 times, respectively, compared with the control variant.