SEASONAL CHANGES IN THE ACTIVITY OF SOME ENZYMES IN THE SERUM OF BOSNIAN MOUNTAIN HORSE (EQUUS CABALLUS L.)
We investigated the activity of enzymes (AST, ALT, CK, LDH, ALP and GGT) in serum of the bosnian mountain horse Equus caballus L. during spring and autumn. Enzyme activities were determined spectrophotometrically. Based on the results, have been identified a significant changes of the investigated enzymes. In the autumn period, there was a statistically significant increase in enzyme activity (p <0.05), which is characteristic of both males and females. We analyzed gender differences and found a significantly higher enzyme activity in serum of females compared to males. Enzymatic activity of LDH and CK showed significant variation resulting from seasonal changes and individual differences, while the enzymatic activity of GGT and ALP shows no significant seasonal changes in the serum of the studied species. Key words: enzyme activity, seasonal changes, Bosnian mountain horse