Satterlee D G, Jones R B, Ryder F H
Department of Poultry Science, Louisiana State University, Baton Rouge 70803.
Poult Sci. 1993 Jun;72(6):1132-6. doi: 10.3382/ps.0721132.
Despite evidence for a positive association between adrenocortical activation and fearfulness, the effects of chronic (12 to 20 h) exposure to stressful stimulation on the fear reactions of Japanese quail genetically selected for high (HS) or low (LS) plasma corticosterone response to immobilization stress are not straightforward. The present study examined tonic immobility fear responses in quail of both lines that, immediately prior to testing, either had been allowed to remain undisturbed or had been exposed to an acute stressor similar to that used in the selection program (i.e., a short-latency stressor; 5 min of immobilization). Tonic immobility responses were generally more pronounced in quail of the HS line than the LS line, and they were exaggerated in both lines after exposure to stress treatment. The findings provide further support for the suggestion that selection for exaggerated or reduced adrenocortical responsiveness may have been accompanied by a concomitant and unconscious effect on underlying fearfulness.
尽管有证据表明肾上腺皮质激活与恐惧之间存在正相关，但长期（12至20小时）暴露于应激刺激对因对固定应激的血浆皮质酮反应高（HS）或低（LS）而进行基因选择的日本鹌鹑的恐惧反应的影响并不简单。本研究检查了两个品系鹌鹑的紧张性不动恐惧反应，在测试前，这些鹌鹑要么未受干扰，要么暴露于与选择程序中使用的类似的急性应激源（即短潜伏期应激源；5分钟固定）。HS品系鹌鹑的紧张性不动反应通常比LS品系更明显，并且在暴露于应激处理后，两个品系的反应都被夸大了。这些发现为以下建议提供了进一步支持：选择增强或减弱的肾上腺皮质反应性可能伴随着对潜在恐惧的伴随性和无意识影响。
