Riesenfeld A
Acta Anat (Basel). 1977;98(2):206-09. doi: 10.1159/000144795.
A quantitative method was used to establish the sexual dimorphism of bone robusticity in 10 domesticated strains of rats and in wild rats. Sexual dimorphism had its highest frequency in the pelvis, followed by the ulna, the skull, and the femur and tibia. Humerus and tail showed the lowest frequency of such sexual dimorphism. This distribution in an unspecialized mammal such as the rat, in which selective pressures are at their minimum becauses of the factor of domestication, can serve as a baseline for comparison with taxa in which selective forces are more strongly active.
采用定量方法确定了10个家鼠品系和野生大鼠骨骼粗壮度的两性差异。两性差异在骨盆中出现的频率最高，其次是尺骨、颅骨、股骨和胫骨。肱骨和尾巴出现这种两性差异的频率最低。在像大鼠这样的非特化哺乳动物中，由于驯化因素，选择压力处于最低水平，这种分布情况可作为与选择力更为活跃的分类群进行比较的基线。
