EFFECT OF VITAMINS A AND B6 ON THE BIOCHEMICAL INDICATORS OF CARP FINGERLINGS (CUPRINUS CARPIO L.)
The objective of the study was to examine the effect of additional vitamins A (retinol) and В<sub>6</sub> (pyridoxine) in feed mixtures on the biochemical parameters of the Nivkovskiy intrabreeded type carp of Ukrainian scaly breed (Cuprinus carpio L.) fingerlings to obtain a quality fish seed material. The studies were carried out at the Bila Tserkva experimental hydrobiological station of the Institute of Hydrobiology of the National Academy of Sciences of Ukraine in 2015. To achieve this objective, the conventional biochemical methods were used. Scaly carp fingerlings were kept in the same conditions. Three groups of fish with an average initial mass of 1.4 ± 0.07 g at the age of 30 days with the same number of individuals (25 specimens) were used. One of the groups was the control one (group 1), and the other two were research groups, which were fed with the start combined feed with addition of vitamins A and В<sub>6</sub>. The effect of powdered water-soluble vitamin В<sub>6</sub> with content of 99% of pyridoxine hydrochloride mass, as well as the complex of vitamins A and В<sub>6</sub>, encapsulated in polymeric carriers, on biochemical indicators of carp was investigated and compared. It was found that the addition of encapsulated pyridoxine and pyridoxine complex encapsulated with retinol to the feed significantly by 9.9% and 22.52% increases the total protein content in the fish tissues as compared to the control. It was also observed a general positive effect of the investigated vitamin supplements, especially of the vitamin complex, on glycogen content in the tissues of scaly carp. The decrease in the processes of lipid peroxidation in tissues is evidence of the positive effect of vitamins A and В<sub>6</sub> on the physiological state of fish.