Kemper A, Wildenhahn V, Lyhs L
Arch Exp Veterinarmed. 1976;30(4):619-25.
Exposure of pigs with a body mass of 25-30 kg to long-lasting motor noise (108 dB, 60-8000 Hz, 72 hours) results in a considerable increase of catecholamine concentration in the plasma. Coincidently there is a sharp continuous decrease of the 11-OHKS in the plasma during the whole period of exposure to noise. Immediately after stopping the acoustic irritation the concentration of plasma corticosteroids increases again. The electroencephalogram (EEG) giving evidence of inhibition signs during exposure to noise an adaptation effect of the information processing system is concluded. The increase of the PBJ during the period of acoustic stress points to an increased function of the thyroid gland but simultaneously it is considered to be an expression of the elevated adrenergic situation. By reason of the strong deviation of the three observed regulatory systems must be concluded that longer-lasting exposure to noise with the applied quality and intensity represents a stress situation for pigs having noise character as established for men. A possible influence on the productivity of the pork type pig by permanent acoustic stress is indicated.
将体重25 - 30千克的猪暴露于持久的发动机噪音（108分贝，60 - 8000赫兹，72小时）会导致血浆中儿茶酚胺浓度显著增加。同时，在整个噪音暴露期间，血浆中11 - OHKS急剧持续下降。停止声刺激后，血浆皮质类固醇浓度立即再次升高。脑电图（EEG）显示在噪音暴露期间有抑制迹象，由此得出信息处理系统存在适应效应。在声应激期间PBJ升高表明甲状腺功能增强，但同时也被认为是肾上腺素能状态升高的一种表现。鉴于所观察到的三个调节系统存在强烈偏差，必须得出结论，即长时间暴露于具有所应用的特性和强度的噪音中，对猪来说如同对人一样构成了具有噪音特征的应激情况。这表明长期声应激可能会对肉猪的生产力产生影响。
