Serum corticosterone levels in embryos, newly hatched, and young turkey poults.
Serum corticosterone levels in embryos, newly hatched, and young turkey poults.
复制标题
胚胎、新孵化的和幼火鸡幼禽的血清皮质酮水平。
作者：
B. Wentworth;M. O. Hussein
这些实验的目的是确定浓度的皮质酮，主要肾上腺皮质类固醇在鸟类，血清中的火鸡胚胎（12至28天的发展），新孵化的火鸡幼鸟（pipped和6小时postthatch），和幼鸟之间的1和15天的年龄。还测定了在生理浓度下给予外源剂量的皮质酮对孵化的影响。一个显着的（P小于0.01）增加血清皮质酮从0.69至1.26 ng/ml发生在胚胎发育的17和18天之间;第二个显着增加到4 ng/ml是在孵化之前。血清皮质酮浓度下降，注意到在孵化过程中，孵化后的第一个6小时。血清中皮质酮的浓度波动的孵化后皮质酮分泌成为1和15天之间建立孵化后。处理胚胎2天前孵化与外源剂量的皮质酮（540纳克/胚胎）的趋势表明，平均孵化时间缩短，孵化率显着增加。
The objectives of these experiments were to determine the concentration of corticosterone, the principal adrenocortical steroid in avian species, in serum of turkey embryos (12 to 28 days of development), newly hatched turkey poults (pipped and up to 6 hr posthatch), and poults between 1 and 15 days of age. The effect of giving exogenous doses of corticosterone at a physiological concentration on hatching was also determined. A significant (P less than .01) increase in serum corticosterone from .69 to 1.26 ng/ml occurred in the embryos between 17 and 18 days of development; a second significant increase to 4 ng/ml was just prior to hatching. A decrease in serum corticosterone concentration was noted during hatching and for the first 6 hr after hatching. Concentrations of corticosterone in serum fluctuated as posthatch corticosterone secretion became established between 1 and 15 days posthatch. Treatment of embryos 2 days prior to hatching with exogenous doses of corticosterone (540 ng/embryo) suggested a trend toward shorter mean incubation time and significantly increased hatchability.