Weiss J, Köhler W, Landsberg J W
Dev Psychobiol. 1977 Jan;10(1):59-64. doi: 10.1002/dev.420100109.
Increased fear may be one of the factors limiting the sensitive imprinting period. Thus, we analyzed corticosterone levels in 121 Peking ducklings during and after this sensitive period using the method of competitive protein binding. The data pointed to a corticosterone increase within a period of 12-28 hr after hatching as well as to the presence of a circadian rythm. The low coefficient of determination of post-hatch age and corticosterone level (8%) pleads for a multi-dimensional system. However, the corticosterone increase may be the basis for an increase in fear and a decrease in the likelihood of imprinting.
恐惧增加可能是限制敏感印记期的因素之一。因此，我们使用竞争性蛋白结合法分析了121只北京鸭在这个敏感期期间及之后的皮质酮水平。数据表明，孵化后12 - 28小时内皮质酮水平升高，且存在昼夜节律。孵化后年龄与皮质酮水平的低决定系数（8%）表明存在一个多维系统。然而，皮质酮增加可能是恐惧增加以及印记可能性降低的基础。
