Brain P C, Onagbesan O M, Peddie M J, Taylor T G
School of Biochemical and Physiological Sciences, University of Southampton, England.
Gen Comp Endocrinol. 1988 Feb;69(2):174-80. doi: 10.1016/0016-6480(88)90003-2.
Plasma concentrations of progesterone, testosterone, estradiol, and estrone were measured by radioimmunoassay in female Japanese quail 22 to 70 days of age. The birds were raised on long (16 hr light per day) or short (8 hr light per day) photoperiods. Only the birds raised on the long photoperiod layed eggs, starting between 42 and 49 days of age. The concentration of each reproductive steroid increased between 28 and 35 days of age, but the increases were more substantial in the birds raised on long days than in the birds raised on short days. Changes in plasma progesterone and testosterone concentrations showed similar trends: the concentrations increased before the onset of lay and were maintained at a high level in the laying birds. In contrast, plasma concentrations of estradiol and estrone increased to a peak at 35-42 days and declined once egg laying became established. The short-day birds also showed increased plasma estrogen levels, maximal at 35-42 days, with estrone being at a higher concentration than estradiol. The increases in plasma steroid levels occurred during the period of rapid growth of the ovaries and oviducts in the long-day birds, although in the short-day birds the growth of these organs was much less substantial.
通过放射免疫分析法测定了22至70日龄雌性日本鹌鹑血浆中孕酮、睾酮、雌二醇和雌酮的浓度。这些鹌鹑饲养在长光照（每天16小时光照）或短光照（每天8小时光照）周期下。只有饲养在长光照周期下的鹌鹑会产蛋，产蛋起始于42至49日龄之间。每种生殖类固醇的浓度在28至35日龄之间均有所增加，但长光照周期饲养的鹌鹑增加幅度比短光照周期饲养的鹌鹑更大。血浆孕酮和睾酮浓度的变化呈现相似趋势：在产蛋开始前浓度升高，并在产蛋鹌鹑中维持在较高水平。相比之下，血浆雌二醇和雌酮浓度在35至42日龄时升至峰值，产蛋一旦开始便下降。短光照周期的鹌鹑血浆雌激素水平也升高，在35至42日龄时达到最高，其中雌酮浓度高于雌二醇。长光照周期鹌鹑血浆类固醇水平的升高发生在卵巢和输卵管快速生长期间，不过短光照周期鹌鹑这些器官的生长幅度要小得多。
