Investigations on sperm production in PIC boars

Abstract

The biological material was represented by PIC boars for whom the main indices of spermiogram were estimated. The mean ejaculated volume was by 327.0 ± 14.4 ml lower in boars from SL 1075 (304.3 ± 7.3 ml) and insignificantly higher in boars from SL 408 (349.8 ± 7.2 ml). The volume was much influenced by age of boars and season. The mean concentration of sperm in spermatozoon was of 343.9 ± 9.1 x 106 spermatozoids/ml with significant differences between these two synthetic lines: 386.6 ± 12.1 x 106 spermatozoids/ml in SL 1075 and 301.2 ± 9.8 x 106 spermatozoids/ml in SL 408. The mean concentration was higher between 2 and 3 years and in autumn. The mean number of dose/ejaculate was of 20.8, differences being found according to SL of boars (19.7 in SL 408 and 22.0 in SL 1075), age of boars (15.2 at the age of one year, 21.7 at the age of two years, 24.8 at the age of three years and 22 at the age of 3.5 years) and according to the season when sample was taken over: 22.9 in spring, 17.9 in summer, 22.3 in autumn and 20.3 in winter.