Kemper A, Wildenhahn V, Lyhs L
Arch Exp Veterinarmed. 1976;30(2):309-15.
Plasma concentrations of 11-OHKS were transitorily increased with significance in pigs, 25 kg to 45 kg in live weight, exposed to short-time engine noise (120 dB, 60 to 8,000 Hz, 60 minutes). Intensity of noise application and duration did not cause significant variation of plasma concentrations in catecholamines nor in P.B.J. The catecholamines were on a rising trend. Those results supported the conclusion that both quality and quantity of applied noise are perceived by store pigs as factors of disturbance. Their noise nature is comparable to that perceived by man and laboratory animals. Decline in 11-OHKS after 55 minutes of exposure to noise was recorded also by other authors who had exposed other species to long-time noise. It seems to reflect adaptation mechanisms in the information-processing system. The reactivity to noise of the adrenal cortext of swine was found to depend on the form of keeping. Animals kept in groups responded to noise in the same way in which they would respond to acute cold, by significantly increasing rise of plasma concentrations of 11-OHKS. The above results were taken to support the conclusion that organic response to a specific stimulus depended on the level of each control circuit at the time of stimulation.
体重在25公斤至45公斤的猪暴露于短时间发动机噪音（120分贝，60至8000赫兹，60分钟）后，其血浆中11 - 羟基皮质类固醇（11 - OHKS）的浓度短暂升高且具有显著性。噪音施加的强度和持续时间并未导致儿茶酚胺以及P.B.J.血浆浓度的显著变化。儿茶酚胺呈上升趋势。这些结果支持了这样的结论，即育肥猪将施加的噪音的质量和数量都视为干扰因素。其噪音性质与人类和实验动物所感知到的类似。其他将其他物种暴露于长时间噪音的作者也记录到，在暴露于噪音55分钟后11 - OHKS下降。这似乎反映了信息处理系统中的适应机制。发现猪肾上腺皮质对噪音的反应性取决于饲养方式。成群饲养的动物对噪音的反应方式与它们对急性寒冷的反应方式相同，即血浆中11 - OHKS浓度显著升高。上述结果被用来支持这样的结论，即对特定刺激的机体反应取决于刺激时每个控制回路的水平。
