Hargitai C, Forgó V, Mézes M, Péczely P
Department of Animal Physiology and Health, University of Agricultural Sciences, Gödölló, Hungary.
Acta Biol Hung. 1993;44(2-3):255-68.
We have defined the seasonal and circadian changes of the LH level of plasma of 2 years old male and female Hungarian domestic geese by means of the LH antigen-antibody of chickens in the heterologous RIA system. The LH level of plasma in geese living in conditions of natural light does not show any variation resulting from sexual differences, but the application of GnRH analogue (Ovurelin) causes higher peaks in ganders than in females. Since the LH level of plasma at the end of November in sexually inactive birds is high at night and lower during the day; the fluctuation in females can be considered as having a circadian rhythm. Five minutes after the intravenous application of GnRH analogue the LH level reaches its peak in the plasma and this high LH level returns to pre-injection values in 3 hours. The LH level shows a characteristic seasonal cycle in both sexes. The spring peak (reproduction cycle) is followed by a definite decrease at the beginning of the photorefractoriness (mid-June) with a slight automnal increase in female geese.
我们借助鸡的促黄体生成素（LH）抗原抗体，在异源放射免疫分析（RIA）系统中，测定了2岁匈牙利家鹅雌雄两性血浆中LH水平的季节性和昼夜节律变化。生活在自然光条件下的鹅血浆中LH水平未表现出任何因性别差异导致的变化，但应用促性腺激素释放激素类似物（Ovurelin）后，雄鹅体内的峰值高于雌鹅。由于在11月底性不活跃的鸟类血浆中LH水平夜间较高而白天较低；因此可以认为雌性鹅的这种波动具有昼夜节律。静脉注射促性腺激素释放激素类似物5分钟后，血浆中LH水平达到峰值，且这种高LH水平在3小时后恢复到注射前的值。LH水平在两性中均呈现出特征性的季节性周期。春季峰值（繁殖周期）之后，在光不应期开始时（6月中旬）会有明显下降，雌性鹅在秋季略有增加。
