EVALUATION OF THE INFLUENCE OF PRAVAD FEED ADDITIVE AND ITS COMPONENTS ON THE STRUCTURE OF LEUKOCYTE FORMULA OF AFRICAN SHARPTOOTH CATFISH

The paper presents results of studies of white blood parametres of African catfish in case of application of highly effective "Pravad" polyvalent feed additive, which includes adaptogenes, probiotics, vitamin and amino acid complexes. The object of the study was males and females of sharptooth catfish of different age. The aim of our work was to study the effect of "Pravad" complex polyvalent feed additive on leukocyte formula of African catfish. Highly effective polyvalent feed additive "Pravad" includes several biologically active ingredients necessary for life. By the nature of its effect on the fish organism, Pravad feed additive significantly accelerates the biomass gain, has a pronounced effect against oxidative and psychogenic stress, increases resistance to adverse environmental factors, low oxygen levels, toxins in water, lack of nutrients and vitamins, imbalance of feed; prevents infections, reduces toxic effect of agents dangerous to the body, regulates digestion, improves immunity, regulates intestinal microbiocenosis, stimulates growth and development, increases survivability. The object of the study was males and females of African catfish of different age. Our work presents results of the studies of Pravad feed additive effect on immunocompetent cells of white blood of African catfish. All structural components of the blood are among the first in the body to respond to changes in the external environment; therefore, numerous hematological parameters also change rapidly. The obtained results indicate a conspicuous positive effect of Pravad feed additive on leukocyte formula structure of African catfish.