Abstract
This scientific study examines the experience of using astaxanthin in feeding tilapia fingerlings, and its effect on the physiological state of individuals. The work used a set of methods used in fisheries research - variation statistics and hematological tests. The data obtained during the study indicate that the use of astaxanthin at a concentration of 20.0 mg per 1 kg of feed gives the best indicators of the physiological state of tilapia fingerlings. Analyzing the data obtained after the completion of the experimental work, a significant increase in the level of hemoglobin concentration in the experimental variant by 1.3 times was established in comparison with the control variant.
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