Donovan B T, Matson C, Kilpatrick M J
J Endocrinol. 1983 Dec;99(3):361-8. doi: 10.1677/joe.0.0990361.
The changes in concentration of plasma oestradiol, oestrone, progesterone, androstenedione, testosterone, cortisol and FSH were followed in intact female ferrets brought into oestrus by extension of the photoperiod from 8 to 16 h daily. An additional group of spayed females was similarly exposed to the extended photoperiod. There was no change in the blood oestrone, androstenedione and testosterone levels in the spayed females; the concentration of oestradiol, progesterone and FSH fell, while that of cortisol rose after 6 weeks. The intact females showed no change in plasma oestrone and cortisol concentrations, a rise in plasma oestradiol associated with the onset of oestrus, and falls in the blood levels of testosterone, androstenedione, progesterone and FSH. These results indicate that the changes in plasma gonadal steroid levels after extension of the photoperiod differ markedly from those in rodents or ruminants.
对通过将每日光照时长从8小时延长至16小时而进入发情期的完整雌性雪貂，监测其血浆雌二醇、雌酮、孕酮、雄烯二酮、睾酮、皮质醇和促卵泡激素浓度的变化。另一组已绝育的雌性雪貂同样暴露于延长的光照周期下。已绝育雌性雪貂的血液雌酮、雄烯二酮和睾酮水平没有变化；6周后，雌二醇、孕酮和促卵泡激素浓度下降，而皮质醇浓度上升。完整雌性雪貂的血浆雌酮和皮质醇浓度没有变化，血浆雌二醇随着发情期开始而升高，血液中睾酮、雄烯二酮、孕酮和促卵泡激素水平下降。这些结果表明，光照周期延长后血浆性腺类固醇水平的变化与啮齿动物或反刍动物明显不同。
