Seasonal influence on biochemical blood parameters in males of Californian rabbit breed

Abstract

Biochemical parameters of rabbit blood are important for the control of animal diseases and the impact on meat productivity of diets and various supplements. The biochemical profile of blood changes under the influence of various factors, including temperature and humidity, which are associated with seasonality. The aim of the study was to determine the influence of seasonality on the biochemical analysis of blood of meat rabbits.The average annual temperature in the rabbitry was 15.9±1.10 °? during the observation period, with minimum values in winter +5.30 °?, maximum values in summer +27.70 °? and an average relative humidity of 68.3±1.2%. The seasonal fluctuations (within physiological values) of some serum indicators of protein-nitrogen metabolism in males of Californian rabbits breed have been established. In spring, we observed a significant increase in the concentration of total protein by 7.0-12.0% and albumin – by 9.7-9.8%. At the same time, the lowest values of urea, creatinine and uric acid were equal or less than the average annual physiological indicators. Deviations of temperature from comfortable indicators in winter and summer led to the adaptive changes in rabbit organisms. We revealed the changes in the creatinine econtent in summer, uric acid content in summer and winter and increased activity of ALAT enzyme in winter and summer. We suggested that in case of rabbit keeping in rooms without artificial regulation of the microclimate, it is necessary to consider the influence of seasonal temperatures on blood serum biochemical parameters.