Atherogenicity index, ratio of lipoproteins, total cholesterol and protein of broiler chickens as a factor of health-saving technologies

Abstract. The purpose is to determine the atherogenic index (AI), the ratio of atherogenic lipoproteins to antiatherogenic ones, total cholesterol (TC) and protein (TP) were determined in the early postembryonic ontogenesis of broiler chickens to characterize the health-preserving qualities of poultry products. Methods. Blood for the studies was taken from broiler chickens (n = 40) raised in an industrial flock at the age of 1 day, 7 days, 23 days and 42 days. The collected blood was analyzed to determine physiological and biochemical parameters. The average daily body weight gain of broiler chickens was taken into account. Results. It was found that the combined use of the Shapiro – Wilk test with calculation of the normal probability distribution graph of values received a proven advantage in efficiency compared to the use of the Kolmogorov – Smirnov and Lilliefors tests for checking the distribution of the concentration of high-density lipoprotein cholesterol (HDL-C), mmol/l in Hubbard ISA F15 broiler chickens for compliance with the law of normal distribution of values. By the 7th day, AI in conventional units decreased by 56.38 % (p ≤ 0.001), the ratio of low-density lipoprotein cholesterol (LDL-C) to HDL-C in conventional units (LDL-C/HDL-C) decreased by 62.78 % (p ≤ 0.001). On the 23rd and 42nd days, the dynamics of AI and LDL-C/HDL-C stabilized. The LDL-C/TC ratio by the age of 7 days decreased by 36.62 % (p ≤ 0.05) and stabilized without significant changes in the period from 23 to 42 days in relation to the age of 7 days within the range of 31.0–41.77 %. The dynamics of TC to TP in % (TC/TP) by the age of 7 days decreased by 65.45 % (p ≤ 0.001). Then by the age of 23 days TC/TP slightly increased by 36.34 % (p ≤ 0.05). Scientific novelty. The dynamics of the atherogenicity index, the ratio of lipoproteins, total cholesterol and protein in the early postembryonic period of broiler chickens, that is, in the technological period of poultry meat production, showed a tendency to stabilise the effective concentration of high-density lipoprotein cholesterol, a moderate concentration of low-density lipoprotein cholesterol, in the process of intensive growth and development of skeletal muscles.