Gross W B, Siegel P B
Avian Dis. 1981 Apr-Jun;25(2):312-25.
Cockerels were kept in environments characterized by high (HSS), medium (MSS), or low (LSS) levels of social stress for 3 or 4 months. Chickens raised in an environment of low light intensity (LSS) gained more weight than did those raised under natural lighting. Ability of chickens to produce antibody in response to antigen was greatly reduced, 2(15.4) in the LSS group to 2(3.4) in the HSS group, 1 day after chickens were moved from the LSS environment into the HSS environment. Normal responsiveness returned within 1 week. No long-term environments affected antibody production. After 3 months, chickens in the LSS environment had reduced weight gain and resistance to Escherichia coli infection compared with birds in the HSS environment. Chickens in the MSS environment, compared with those on the HSS and LSS environments, had greater weight gains, superior feed efficiencies, medium plasma corticosterone levels, a better negative correlation between antibody responsiveness and RBC antigens, and better resistance to Mycoplasma gallisepticum challenge. All parameters except antibody responsiveness were such that long-term exposure to HSS or LSS environments appears to be detrimental.
将公鸡置于具有高（HSS）、中（MSS）或低（LSS）水平社会应激的环境中3或4个月。在低光照强度环境（LSS）中饲养的鸡比在自然光照下饲养的鸡体重增加更多。鸡从LSS环境转移到HSS环境1天后，其对抗抗原产生抗体的能力大幅降低，LSS组从2（15.4）降至HSS组的2（3.4）。1周内恢复正常反应性。没有长期环境影响抗体产生。3个月后，与HSS环境中的鸡相比，LSS环境中的鸡体重增加减少，对大肠杆菌感染的抵抗力降低。与HSS和LSS环境中的鸡相比，MSS环境中的鸡体重增加更大、饲料效率更高、血浆皮质酮水平中等、抗体反应性与红细胞抗原之间的负相关性更好，并且对鸡毒支原体攻击的抵抗力更强。除抗体反应性外，所有参数表明长期暴露于HSS或LSS环境似乎是有害的。
