Activity of aspartate aminotransferase, alkaline and acid phosphatase of wild boar/domestic pigs hybrids semen in annual cycle. The object of the study was to determine the biochemical properties of the semen of wild boar/domestic pig hybrids, as well as changes in these properties over the annual cycle. Over the 14 months study period in 257 ejaculates sampled from 4 fertile hybrids aspartate aminotransferase (AspAT), alkaline and acid phosphatase were determined. Generally activity of this enzyme are similar to those of domestic boars and wild boar. It was found no effect of the duration of light period on the activity of AspAT and alkaline phosphatase, but activity of acid phosphatase was significantly correlated with the duration of light period.

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