Abstract
Serum biochemical analysis is a valuable diagnostic tool to evaluate the metabolic and health status of animals. Сcompared with females, the relationship between biochemical components of blood and the effectiveness of the male reproductive system have been poorly understood. The aim of the work was to determine the biochemical blood profile before the start and at the peak of the breeding season in male Saanen goats with differences in the manifestation of sexual behavior. Blood sampling from animals (n = 16) was carried out twice: before the start of the breeding season (4th week of July) and at the peak of the breeding season (4th week of September). In the blood serum, the concentration of total protein, albumin, urea, creatinine, glucose, total cholesterol, total bilirubin was determined, as well as the activity of enzymes: aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP). At the end of the observation period, the animals were divided into groups: group I (n=10) - males with a full manifestation of sexual reflexes when taking sperm and group II (n=6) - individuals with incomplete manifestation of sexual reflexes. The biochemical profile of blood had features in males with differences in the manifestation of sexual behavior. At the peak of the breeding season in group I compared to group II in the blood of animals, the concentration of creatinine, triglycerides and total bilirubin increased by 37.4%, 170%, 48.3%, respectively (at least p<0.05). Before the mating period, the content of total bilirubin in the blood in group II was 63.9% higher than in group I (p<0.01) and 12.1% higher than the upper limit of the reference interval. We assume that an increase in the concentration of total bilirubin in the blood of males in the pre-mating period above the boundary of the reference interval is negatively associated with the full manifestation of sexual reflexes in the breeding season.
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