Graul C, Wildenhahn V, Lyhs L, Lohse W
Arch Exp Veterinarmed. 1976;30(5):643-50.
Two experimental groups and series were compared (leghorns and broilers as well as two age groups of broilers) for their adaptive responses to repeated noise application. The noise was 100 dB and applied daily 30 minutes. The reference for comparison was the plasma-11-hydroxycorticosteroid concentration (11-OHKS). The results differed somewhat from those obtained earlier from one first short-time noise application, in that the rise in plasma glucocorticosteroid concentrations dropped from 431 to 210 per cent of the initial values in adult leghorns exposed to repeated noise stress over seven days. Adult broilers, however, did not exhibit any difference in the magnitude of rise of 11-OHKS concentrations by comparison between first and seven days of repeated stress. The initial values, however, were reached earlier by repeated noise application.
比较了两个实验组和系列（来航鸡和肉鸡以及两个年龄组的肉鸡）对反复施加噪声的适应性反应。噪声强度为100分贝，每天施加30分钟。比较的参考指标是血浆11-羟基皮质类固醇浓度（11-OHKS）。结果与早期首次短期施加噪声时获得的结果略有不同，在连续七天暴露于反复噪声应激的成年来航鸡中，血浆糖皮质类固醇浓度的升高从初始值的431%降至210%。然而，成年肉鸡在反复应激的第一天和第七天之间比较，11-OHKS浓度升高的幅度没有任何差异。不过，通过反复施加噪声能更早达到初始值。
