Variability of ejaculate volume and sperm motility depending on the age and intensity of utilization of boars (original) (raw)

2013, Biotehnologija u stocarstvu

The main objective of this study was to evaluate the effect of age (A) and the intensity of the boars' utilization (s) on the phenotypic variability of ejaculate volume (VOL) and sperm motility (MO). The study included 274 ejaculates of Large White boars (LW). Boars were divided into six classes according the age when the ejaculate was taken (10-13, 14-17, 18-21, 22-25, 26-29 and ?30 months). Semen samples were analyzed during four seasons (spring, summer, autumn, winter). The intensity of the use of boars was seen as the impact of the group (class) of intervals between two successful collections (I; ? 5 , 6, 7 , 8, 9-10, 11-13, 14-21 days). Data processing was performed using the GLM procedure using the statistical package SAS 9.1.3 (SAS Inst. Inc., 2002-2003). Average values of VOL, MO, I, A, were: 178.94 ml, 90.35%, 9.37 days and 655.93 days. The effect of boars on both studied sperm traits was highly significant (p<0.001). The volume of ejaculate varied under the influenc...