Sexual dimorphism in weight among the primates: The relative impact of allometry and sexual selection |
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Authors: | Steven J C Gaulin Lee Douglas Sailer |
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Institution: | (1) Department of Anthropology and Pymatuning Laboratory of Ecology, University of Pittsburgh, 15260 Pittsburgh, Pennsylvania;(2) Department of Anthropology and Center for Multivariate Analysis, University of Pittsburgh, 15260 Pittsburgh, Pennsylvania |
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Abstract: | In this paper, we examine allometric and sexual-selection explanations for interspecific differences in the amount of sexual
dimorphism among 60 primate species. Based on evidence provided by statistical analyses, we reject Leutenegger and Cheverud’s
(1982). Int. J. Primatol.3:387-402] claim that body size alone is the major factor in the evolution of sexual dimorphism. The alternative proposed
here is that sexual selection due to differences in the reproductive potential of males and females is the primary cause of
sexual dimorphism. In addition, we propose that the overall size of a species determines whether the dimorphism will be expressed
as size dimorphism,rather than in some other form. |
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Keywords: | sexual dimorphism sexual selection allometry weight dimorphism modulation model |
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