Jones R B, Mills A D, Faure J M, Williams J B
Roslin Institute (Edinburgh), Scotland, United Kingdom.
Physiol Behav. 1994 Sep;56(3):529-34. doi: 10.1016/0031-9384(94)90297-6.
Japanese quail genetically selected for long (LTI) rather than short (STI) tonic immobility reactions showed more pronounced overt fear-responses in a number of putatively frightening situations. Greater fear has also been found in Japanese quail selected, in an independent program, for exaggerated (HS, high stress) rather than reduced (LS, low stress) plasma corticosterone response to brief mechanical restraint. The present study examined tonic immobility (TI) and adrenocortical responses in male and female quail of the LTI, STI and CON (control) lines which had either remained undisturbed or had been briefly exposed to a mechanical restraint stressor similar to that used for selection of the HS and LS lines. Behavioral strategies during restraint differed across lines, i.e., struggling followed the pattern STI > CON > LTI. The LTI quail showed more pronounced TI reactions than did CON and STI birds. Mechanical restraint prolonged subsequent TI responses and markedly elevated plasma corticosterone concentrations in all lines, but there were no line x treatment interactions. The results are discussed in terms of the parallels between the four selected lines and of the likelihood that the independent selection programs may have affected the same intervening variable.
在基因上被选择用于产生长时（LTI）而非短时（STI）强直性静止反应的日本鹌鹑，在一些假定的恐惧情境中表现出更明显的公开恐惧反应。在一个独立项目中被选择用于对短暂机械束缚产生夸张（HS，高应激）而非降低（LS，低应激）血浆皮质酮反应的日本鹌鹑中，也发现了更大的恐惧。本研究检测了LTI、STI和CON（对照）品系的雄性和雌性鹌鹑的强直性静止（TI）和肾上腺皮质反应，这些鹌鹑要么未受干扰，要么被短暂暴露于与用于选择HS和LS品系的类似机械束缚应激源。束缚期间的行为策略在不同品系间有所不同，即挣扎遵循STI > CON > LTI的模式。LTI鹌鹑比CON和STI鹌鹑表现出更明显的TI反应。机械束缚延长了随后的TI反应，并使所有品系的血浆皮质酮浓度显著升高，但不存在品系×处理交互作用。根据四个选择品系之间的相似性以及独立选择项目可能影响了相同中间变量的可能性对结果进行了讨论。
