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KMID : 0900920010250030201
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Korean journal of Animal Reproduction
2001 Volume.25 No. 3 p.201 ~ p.206
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Effect of Spring and Summer on Semen Characteristics, Frozen-Thawed Sperm Viability and Testosterone Concentration in Yorkshire Boars
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Kim Hong-Ki
Myung Pyung-Keun
Lee Young-Joo
Ko Hyeon-Jin
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Abstract
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This study was carried out to investigate the effects of spring (March~May) and summer (June~August) influencing semen characteristics, frozen-thawed sperm viability and serum testosterone concentration in Yorkshire boars. Results of this study were as follows: 1. There were no significant differences in the semen volume, pH and sperm concentration of sperm-poor fraction of Yorkshire boars between spring and summer. However, sperm concentrations of sperm-rich fractions in spring were higher than those in summer (P＜0.05). 2. Sperm motility and normal acrosome of raw semen in Yorkshire boars did not differ significantly between spring and summer, However, motility and normal acrosome of frozen-thawed sperm were higher in spring season than in summer season (P＜0.05). 3. Serum testosterone concentrations in Yorkshire boars were 4.04 ng/mell in spring and 2.85 ng/mell in summer. Serum testosterone concentrations in spring were higher than those in summer (P＜0.05). 4. In conclusion, when serum testosterone concentrations in Yorkshire boars were higher, frozen-thawed sperm viability was higher.
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KEYWORD
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Semen characteristics, Sperm viability, Testosterone, Yorkshire boars
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