Tingstrom D H, Thorne B M
J Gen Psychol. 1978 Jan;98(1st Half):23-9. doi: 10.1080/00221309.1978.9920853.
Two experiments were performed to investigate the origin of colony differences in muricidal behavior within the same strain of rat. In the first experiment (N = 52 male Long-Evans rats), the first generation offspring of parents from two different colonies were reared under identical conditions and tested for muricide. No differences were found, indicating that an environmental effect accounted for previously observed differences. The second experiment (N = 36 male Long-Evans rats) examined the effects of the presence or absence of mice in the rearing quarters. Again, no differences in muricidal rates were found. Overall, the offspring of killer mothers killed significantly more often than the offspring of nonkiller mothers.
进行了两项实验来研究同一品系大鼠杀鼠行为中群体差异的起源。在第一个实验中（N = 52只雄性朗-埃文斯大鼠），来自两个不同群体的亲本的第一代后代在相同条件下饲养，并进行杀鼠测试。未发现差异，这表明环境效应是先前观察到的差异的原因。第二个实验（N = 36只雄性朗-埃文斯大鼠）研究了饲养区内有无小鼠的影响。同样，未发现杀鼠率有差异。总体而言，杀手母亲的后代比非杀手母亲的后代杀鼠的频率明显更高。
