Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effect of Season Influencing Semen Characteristics, Frozen-Thawed Sperm Viability and Testosterone Concentration in Duroc Boars

  • Cheon, Y.M. (Department of Animal Science, Chungnam National University) ;
  • Kim, H.K. (Livestock Experiment station, Chungnam Livestock Sanitation Research Institute) ;
  • Yang, C.B. (Division of Research Coordination, RDA) ;
  • Yi, Y.J. (Department of Animal Science, Chungnam National University) ;
  • Park, C.S. (Department of Animal Science, Chungnam National University)
  • Received : 2001.08.29
  • Accepted : 2001.10.25
  • Published : 2002.04.01
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Abstract

This study was carried out to investigate the effects of season influencing semen characteristics, frozen-thawed sperm viability and testosterone concentration in Duroc boars. There were no significant differences in the semen volume and sperm concentration of Duroc boars among spring, summer, autumn and winter. However, the pH of sperm-rich and sperm-poor fractions in autumn and winter season was higher than in spring and summer season in Duroc boars. Sperm motility and normal acrosome of raw semen in Duroc 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 Duroc were higher in spring than summer, autumn and winter. In conclusion, when serum testosterone concentrations were higher in seasons, frozen-thawed sperm viability in Duroc boars were higher.

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