Published in Scientific Papers. Series D. Animal Science., Vol. LVI
Written by Paul-Rodian TĂPĂLOAGĂ, Alexandru ŞONEA, Alexandru IANCU, Elena MITRĂNESCU
Semen production from reproduction boars depends upon different factors as: age, breed, using way to natural mating or collecting, but also the environmental conditions. The present researches have in view to establish how three influence factors as breed, age and collecting season could change the quantitative and qualitative indices of the semen. There were analyzed 65 boars owing to three different genetic types: Large white (16 boars), Landrace (16 boars) and Pietrain (33 boars). At every collecting there were recorded the following sperm indices: macroscopic-sperm volume and microscopic-sperm concentration (x 106spz/ml), and total number of sperm cells/ejaculate (x109). The influence of the three factors was made along two years, studying the dynamics of the sperm volume, concentration and total number of sperm cells/ejaculate depending on boars breed (large white, Landrace and Pietrain), boars age (1 year, comparative two years) and collecting season (spring, summer, autumn and winter). The results of the research regarding the season of semen collecting revealed the fact that the value of the analyzed sperm indices was superior in the cold season.
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qualitative and quantitative indices
