Researches regarding the semen material production to pic boars (original) (raw)

2007, Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies

The biological material was 23 PIC boars from 7 synthetic lines (SL 02, SL 03 and SL 19-great-grandfather boars; SL 1075 and SL 26-grandfather boars; SL 408 and SL 11terminal boars).The semen production has been evaluated after the preservation at intervals of 5 days and there were appreciated the ejaculate volume, the spermatozoa concentration, mobility and spermatozoa total number/ejaculate, between 12 months and 28 months age. The ejaculate average volume was 253,6 ± 13,2 ml, different depending on synthetic line, lower with 33,1% to grandfather boars, higher with 30,6% to parents boars and higher with 18,9% to terminal boars. The seasonal analysis show us lower values in summer and autumn season (with 8,9% and respective, 3,5%) and nearly higher in spring season (with 12,3%) and in winter season (with 0,1%).The spermatozoa average concentration was higher than specialty literature values that are quoted frequently (100 millions/ml) [1, 4 ]. The spermatozoa average concentration (millions/ml) is 421,22 ± 24,4 (between 511,5 ± 34,8 to grandfather and 335,3 ± 19,2 to terminal boars) and it is nearly to recently references (450-550 millions/ml)[2, 5]. The spermatozoa average number/ejaculate was 106,8 ± 4,2 x10 9 , higher than quoted specialty literature value (40-90 x10 9 spermatozoa) [6]. The spermatozoa daily average production was between 11,7 ±1,4 x 10 9 and 21,3 ± 2,3 x 10 9 (average 16,6 ± 2,2 x 10 9), and it is nearly than quoted values by Senger P.L. 2003 (16 x 10 9). In accordance with obtained results, the daily biological capacity to produce gametes is lower in warm season (15,4 ± 2,2 x 10 9) than the other seasons, when PMZ was 18,5 ± 1,8 x 10 9 .The spermatozoa mobility was between 78% and 85%. The undertaken study emphasizes a higher influence of heredity on principals' spermiogram indexes, with individual oscillations and with oscillations between synthetic lines. Also, the semen production level is influenced by environment, the higher temperatures from summer season determines the decreasing of semen production level.