Goldsmith A R, Edwards C, Koprucu M, Silver R
J Endocrinol. 1981 Sep;90(3):437-43. doi: 10.1677/joe.0.0900437.
The concentrations of prolactin and LH were measured in the plasma of male and female ring doves (Streptopelia risoria) during the breeding cycle. Prolactin concentrations were low during courtship and early incubation but increased markedly (P less than 0.01 in both sexes) between days 7 and 15 of incubation, during the period of rapid growth of the crop sac. Levels remained raised for 4 days after the young had hatched but then declined as the crop sacs gradually regressed. These observations showed that concentrations of prolactin were high at the time when the crop sacs were proliferating and producing 'milk' for feeding the young, but that there was no increase in prolactin secretion at the onset of incubation as occurs in ducks, hens and other birds. In samples taken from doves at various times of the day and night there was no increase in plasma prolactin during the first few days of incubation. Concentrations of LH in plasma were generally higher in male doves than in females, but in both sexes were significantly higher during courtship than during incubation and brooding the young. Concentrations increased again when the young were independent and the parents began a second round of courtship.
在繁殖周期中，对雄性和雌性环颈鸽（Streptopelia risoria）血浆中的催乳素和促黄体生成素浓度进行了测量。求偶期和孵化初期催乳素浓度较低，但在孵化第7至15天期间，嗉囊快速生长阶段，催乳素浓度显著升高（两性均P<0.01）。幼雏孵化后，催乳素水平持续升高4天，随后随着嗉囊逐渐退化而下降。这些观察结果表明，在嗉囊增殖并产生“鸽乳”以喂养幼雏时，催乳素浓度较高，但与鸭、母鸡和其他鸟类不同，孵化开始时催乳素分泌并未增加。在白天和夜晚不同时间采集的环颈鸽样本中，孵化初期的头几天血浆催乳素没有增加。雄性环颈鸽血浆中的促黄体生成素浓度通常高于雌性，但在求偶期两性的促黄体生成素浓度均显著高于孵化期和育雏期。当幼雏独立且亲鸟开始第二轮求偶时，促黄体生成素浓度再次升高。
