Wildenhahn V, Graul C, Lyhs L, Lohse W
Arch Exp Veterinarmed. 1976;30(5):633-41.
The effects of first noises on broilers and white leghorns were tested by plasma levels on 11-hydroxycorticosteroid (11-OHKS). The noises were 100 dB, 60 to 8,00 Hz, and applied 30 minutss to one group of broilers, aged 14, 28, and 56 days, and to another group of broilers and white leghorns in adult age. The reactions were compared. Acoustic stimulation was followed by temporary activation of the hypothalamic pituitary-suprarenal system. The rise of the plasma glucocorticosteroid level in leghorns was three times as high as that in adult broilers, which was interpreted as a reflection of stronger organic stress. Reactions differed in intensity, depending on age as well. Plasma-11-OHKS levels went up by 32 per cent maximum in broilers aged 56 days or by 73 per cent in animals aged 14 days or 120 per cent in those aged 28 days. The above results seemed to support the conclusion that noises of the above quantity and quality represented stress on fowl.
通过检测11-羟基皮质类固醇（11-OHKS）的血浆水平，测试了初次噪声对肉鸡和白来航鸡的影响。噪声强度为100分贝，频率在60至800赫兹之间，对一组14日龄、28日龄和56日龄的肉鸡以及另一组成年肉鸡和成年白来航鸡施加30分钟。比较了它们的反应。声学刺激后，下丘脑-垂体-肾上腺系统会暂时被激活。白来航鸡血浆糖皮质激素水平的升高幅度是成年肉鸡的三倍，这被解释为更强的机体应激反应的体现。反应强度也因年龄而异。56日龄肉鸡的血浆11-OHKS水平最高可上升32%，14日龄动物上升73%，28日龄动物上升120%。上述结果似乎支持了这样的结论，即上述强度和频率的噪声对家禽构成了应激。
