Abstract
The effect of constant and natural lighting modes in combination with different feeding regimes on the activity of energy and carbohydrate metabolism enzymes in the muscles and liver of salmon under-yearlings artificially grown in aquaculture in the southern region of Russia was investigated. The revealed differences in the activity of the studied enzymes in under-yearlings indicate changes in the level of energy metabolism and the use of carbohydrates in the processes of ATP synthesis and other biosynthesis pathways in muscles and liver, depending on lighting conditions and in combination with the feeding regime. The high level of aerobic metabolism in the muscles and the increased use of carbohydrates in glycolysis in the liver in salmon fingerlings raised under constant light corresponded to their highest average weight gain. In individuals from all experimental groups, changes in the activity of the studied enzymes were found in dependence on the time after the start of the experiment, that indicated an increase in the levels of aerobic and anaerobic metabolism in muscles and glycolysis in the liver, necessary for the biosynthesis processes during growth.
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