The Dynamic of Main Indices of Spermiogram at Boars, in Function on Some Factors of Influence

Abstract

Breeding boars used for semen production. This is conditioned by many factors. The research aim was to assess the some indices of spermogram (volume, mobility, concentration, total sperm / ejaculate) at 21 boars, the breeds Large White, Landrace, Duroc and Pietrain in relation with some factors of influence: the race, age, individual and harvesting season. The age of boars was between 8 months and 30 months. The rhythm of harvesting was following: one harvesting followed by the five days break. Depending on the breed, were differences for volume (183,5± 4,88 ml at Pietrain boars and 256±5,3 ml at Landrace boars) and for concentration (309,7±6,0 millions/ml at  Duroc boars and 430,7±9,3 millions/ml at Pietrain boars). In function on the season, semen volume varied insignificant between summer (minimum values: 188.4 ± 5.6 ml) and winter (maximum values: 222.1 ± 6.6 ml). The spermatozoon concentration was insignificantly influenced by the season (371.6 ± 11.7 million/ml - summer; 399.4 ± 12.6 million/ ml – autumn). The greatest differences for all indices of semen analysis were in function on individual. The results show that the indices analyzed are strongly influenced by internal environmental factors (breed, individual) and are less conditioned by environmental factors such as the season.