Scaling of sexual dimorphism in body mass: A phylogenetic analysis of Rensch's rule in primates

被引:122
作者
Smith, RJ
Cheverud, JM
机构
[1] Washington Univ, Dept Anthropol, St Louis, MO 63130 USA
[2] Washington Univ, Dept Anat & Neurobiol, St Louis, MO USA
关键词
sexual size dimorphism; Primates; Rensch's Rule; comparative methods; allometry; phylogenetically independent contrasts; phylogenetic autocorrelation;
D O I
10.1023/A:1019654100876
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
We examined the relationship between body mass dimorphism, measured as the natural logarithm of the male/female ratio, and body mass, defined as ln (female mass), with interspecific allometry, phylogenetically independent contrasts, and phylogenetic autocorrelation in 105 primate species. We repeated the analyses for Strepsirhini (N = 23), Haplorhini (N = 82), Platyrrhinii (N = 32), and Catarrhini (N = 47). With independent contrasts, there is statistically significant (p < .05) positive allometry in Primates in general, Haplorhini, and Catarrhini, but not in Strepsirhini or Platyrrhini. The steepest slope (0.134) is for Catarrhini. Results differed when we conducted analyses with traditional interspecific allometry. For example, not only was the Catarrhini slope not statistically significant but also the magnitude of the slope was shallower than that of all other groups, except Strepsirhini. The results indicate that phylogenetic effects influence the scaling of sexual size dimorphism, and that the statistical method used has a large impact on the interpretation of this biological relationship. We discuss issues involved in applying these statistical methods in detail.
引用
收藏
页码:1095 / 1135
页数:41
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