[Relationships between spermiological, biochemical, endocrinological and fertilizing characteristics of boar...

Ejaculate volume, sperm concentration, total number of abnormal spermatozoa, number of spermatozoa with protoplasmic droplet, and the content of chlorides, magnesium, calcium and testosterone in semen plasma were evaluated in 155 ejaculates obtained from 77 boars. Further, the evaluation included the fertilizing ability of the ejaculates, expressed by conception rate after the first insemination, average number of all piglets and live-born piglets in litter after inseminations with the studied semen. The following significant (P less than 0.01) relationships were found after the evaluation of the mutual correlations of the studied characteristics: ejaculate volume to sperm concentration (r = -0.496), chlorides to calcium (r = -0.240), chlorides to magnesium (r = -0.492), magnesium to calcium (r = +0.261), testosterone to conception rate after the first insemination (r = -0.222), boar age to ejaculate volume (r = +0.285), boar age to sperm concentration (r = -0.375), boar age to magnesium (r = -0.281), length of sexual rest to total percentage of abnormal spermatozoa (r = +0.323) and to the percentage of spermatozoa with protoplasmic droplet (r = +0.367). The importance of these findings is treated in discussion.