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Effect of Season on Semen Characteristics, Frozen-Thawed Sperm Viability and Testosterone Concentration in Yorkshire Boars  

Park, C. S (Division of Animal Science and Resources, Chungnam National University)
P. K. Myung (College of Pharmacy, Chungnam National University.)
Lee, S. H. (College of Visual Image & Health, Kongju National University)
Publication Information
Korean Journal of Animal Reproduction / v.26, no.4, 2002 , pp. 339-345 More about this Journal
Abstract
The present study was carried out to investigate the effects of season on semen characteristics, frozen-thawed sperm viability and testosterone concentration in Yorkshire boars. There were no significant differences in the semen volume and sperm concentration on Yorkshire boars among spring, summer, autumn and winter. However, the pH of sperm-rich and sperm-poor fractions in winter season was higher than in spring, summer and autumn season in Yorkshlre boars. Sperm motiliy and normal acrosome of raw semen in Yorkshire boars did not differ significantly among spring, summer, autumn and winter. However, motility and normal acrosome of frozen-thawed sperm were higher in spring season than in summer, autumn and winter. Serum testosterone concentrations in Yorkshire were higher in spring than summer, autumn and winter. In conclusion, we found out that serum testosterone concentrations were very important role for frozen-thawed sperm viability in Yorkshire boars.
Keywords
Semen characteristics; Sperm viability; Testosterone; Yorkshire boars;
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