Phillips-Conroy J E, Jolly C J
Am J Phys Anthropol. 1981 Oct;56(2):115-29. doi: 10.1002/ajpa.1330560203.
Sexual dimorphism in mammals has been related to such variables as absolute body size, ecology, and various aspects of social behavior. Attempts to relate dimorphism to any of these variables have necessarily used small heterogeneous samples to represent the relevant species. We are concerned by the inevitable exclusion of any measure of variability in dimorphism and the consequent impossibility of assessing the significance of observed interspecific differences. In this paper we describe aspects of sexual dimorphism in anubis, hamadryas, and hybrid baboons from Ethiopia. Samples are large enough to permit a measure of intrapopulational variability. Hamadryas baboons are more dimorphic than anubis in epigamic features, but not in postcanine dentition, nor, contrary to previous reports, in body weight or canine tooth size. Hybrid males are more hamadryas-like and hybrid females more anubis-like, as would be predicted by the proposed mechanism for the establishment of the hybrid zone, namely the capture of anubis females by hamadryas males.
哺乳动物的两性异形与诸如绝对体型大小、生态以及社会行为的各个方面等变量有关。将两性异形与这些变量中的任何一个联系起来的尝试必然使用了小型的异质样本，以代表相关物种。我们担心两性异形的任何变异性度量不可避免地被排除在外，以及随之而来的无法评估所观察到的种间差异的显著性。在本文中，我们描述了来自埃塞俄比亚的东非狒狒、阿拉伯狒狒和杂交狒狒的两性异形特征。样本足够大，能够对种群内的变异性进行度量。阿拉伯狒狒在求偶特征方面比东非狒狒更具两性异形，但在犬齿后的牙齿方面并非如此，而且与之前的报道相反，在体重或犬齿大小方面也并非如此。正如建立杂交区域的提议机制所预测的那样，杂交雄性更像阿拉伯狒狒，杂交雌性更像东非狒狒，即阿拉伯狒狒雄性捕获东非狒狒雌性。
