INFLUENCE OF SEASONS OF THE YEAR ON PROOXIDATION PROCESSES IN THE DUCK ORGANISM IN POSTNATAL ONTOGENESIS
The article presents the results of studies on the influence of the seasons on lipid peroxidation processes and the activity of the antioxidant system of ducks depending on the season of the year and age. The aim of the work was to study the state of the processes of free radical oxidation of lipids and the activity of the antioxidant system of the body in different seasons of the year in ducks. For research, 4 groups of animals of 6 birds each were formed. Animals were decapitated on the 10th, 30th and 60th days of each season of the year after hatching from eggs, in accordance with the European Directive for the protection of animals used for scientific purposes. To study the state of free radical lipid oxidation processes, we studied the contents of malondialdehyde, diene and oxydienic conjugates, radical superoxide anion, in blood serum and tissues of internal organs. To assess the state of the antioxidant supply of the body, we determined the activity of catalase enzymes in tissue homogenates, superoxide dismutase and the content of glutathione in blood serum. It was found that the state of lipid peroxidation processes and the activity of the antioxidant system depend on the age of the birds and the seasons of the year. So there is an increase in the activity of lipid peroxidation processes and the antioxidant defense system of the body from 10 to 60 days. Blood serum, liver and heart are subject to the greatest accumulation of lipid peroxidation products, and the highest activity of the antioxidant system is also established in these tissues, this is a natural process from the point of view of the functional properties of these tissues. The intensity of lipid peroxidation processes and the activity of the antioxidant system are also determined by the seasons of the year. The greatest accumulation of products of the secondary accumulation of lipids was determined in the autumn-winter period.