公牛血浆睾酮水平。季节性变化。
Plasma testosterone in bulls. Seasonal variation.
作者信息
Sundby A, Tollman R
出版信息
Acta Vet Scand. 1978;19(2):263-8. doi: 10.1186/BF03547631.
Abstract
Levels of peripheral plasma testosterone and LH were studied in 4 bulls hourly during a 12 hr. sampling period at 5 times of the year. The average plasma testosterone levels were significantly lower in October (1.8 ng/ml, Ρ < 0.001) and December (2.5 ng/ml, Ρ < 0.05) than in February, June and August (3.5, 3.7 and 3.7 ng/ml respectively). LH showed a slight fluctuation during the day, with values ranging between 0.8 and 3.8 ng/ml, but underwent no significant seasonal variation. A significant increase in average plasma testosterone was observed 1 hr. after the LH peaks (P < 0.001).
摘要
在一年中的5个时间点，对4头公牛进行了为期12小时的采样，每小时检测外周血浆睾酮和促黄体生成素（LH）水平。10月（1.8纳克/毫升，P<0.001）和12月（2.5纳克/毫升，P<0.05）的平均血浆睾酮水平显著低于2月、6月和8月（分别为3.5、3.7和3.7纳克/毫升）。LH在一天中略有波动，值在0.8至3.8纳克/毫升之间，但没有明显的季节性变化。在LH峰值出现1小时后，观察到平均血浆睾酮显著增加（P<0.001）。
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