非繁殖季節における種雄馬精液性状の統計学的分析

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A Statistical analysis of seminal characteristics has been made on ejaculates from stallions in non-breeding season. Semen was collected from two Breton and one Percheron stallions. The 180 ejaculates were obtained from November 1969 to January 1970. The mean values of seminal characteristics examined were:62.5ml in volume of gel-free semen, 2.1×108 in sperm concentration per ml, 6.8 in pH value, 45.9% in motility of sperm, 15.4% in perencentage of sperm with cytoplasmic droplet, 27.8% in percentage of abnormal spermatozoa, 30.8% in motility of sperm after freezing and thawing. Among the seminal characteristics there were significant multiple correlation coefficients with volume, motility, sperm concentration per ml, cytoplasmic droplet and spermatozoan head abnormalities (P≤0.05). The multiple regression line for the two significant seminal characteristics was Y=10.29+0.34X3+2.38X4(Y: motility of sperm after freezing and thawing, X3: motility of sperm before freezing, and X4: sperm concentration per ml).
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