Urbanski H F, Follett B K
J Endocrinol. 1982 Feb;92(2):279-82. doi: 10.1677/joe.0.0920279.
Plasma levels of LH are generally higher in male than in female quail. This dimorphism was found to persist in quail which had been through a breeding cycle and then gonadectomized. Under long daylengths (12 h light: 12 h darkness (12L: 12D) or 16L: 8D) ovariectomized quail had plasma levels of LH that were 55-70% of those seen in castrated birds. The difference was reduced after transfer to short days (8L: 16D) when LH concentrations fell to basal levels, but again became more pronounced when the quail were restimulated with long photoperiods. Thus, the photoperiodic response system is sexually differentiated.
雄性鹌鹑的血浆促黄体生成素（LH）水平通常高于雌性鹌鹑。这种二态性在经历过繁殖周期然后进行性腺切除的鹌鹑中依然存在。在长日照（12小时光照：12小时黑暗（12L:12D）或16L:8D）条件下，去卵巢鹌鹑的血浆LH水平是阉割鸟类的55 - 70%。转移到短日照（8L:16D）后，差异减小，此时LH浓度降至基础水平，但当鹌鹑再次受到长光周期刺激时，差异又变得更加明显。因此，光周期反应系统存在性别差异。
