Wise D A, Eldred N L, McAfee J, Lauber A
Physiol Behav. 1985 Nov;35(5):775-7. doi: 10.1016/0031-9384(85)90411-1.
The effects of maternal social stress, induced by pairing pregnant females, and social status, measured by agonistic behavior within pairs, on pup development was investigated in hamsters. Using litters from untreated first pregnancies as a control, 40 dams were housed either alone or paired with another dam during their second pregnancy. Within a pair, the dam with more aggressive and fewer defensive responses than the other was considered dominant. Compared to their first unpaired litters, second litters of paired dams were smaller in number. Comparisons among second litters showed that paired dams, especially submissive dams, had fewer pups than unpaired dams. It was concluded that both maternal social stress and low status increase intrauterine mortality.
在仓鼠中，研究了由配对怀孕雌性诱导的母体社会压力以及通过配对内的攻击行为衡量的社会地位对幼崽发育的影响。以未经处理的首次怀孕产仔作为对照，40只母鼠在第二次怀孕期间要么单独饲养，要么与另一只母鼠配对饲养。在一对中，比另一只母鼠具有更多攻击性行为且防御反应更少的母鼠被认为是占主导地位的。与它们首次未配对产的幼崽相比，配对母鼠的第二窝幼崽数量更少。对第二窝幼崽的比较表明，配对母鼠，尤其是顺从的母鼠，比未配对母鼠的幼崽数量更少。得出的结论是，母体社会压力和低社会地位都会增加子宫内死亡率。
