The roles of color signals in the sexual selection of non-human primates
The phenotypic coloration of animals is polychrome which includes plumage,pelage,and skin.It plays an im-portant role in intraspecific communication,predation defense,and thermoregulation.The role of phenotypic coloration in sexual selection deserves to receive considerable critical attention.Non-human primates are an excellent model for in-vestigating the role of phenotypic coloration in sexual selection,owing to their varied and complex pelage and bare skin coloration,mating systems,and visual systems.However,few studies on this subject were conducted in China.Based on a review of studies on the role of phenotypic coloration under sexual pressure in non-human primates,we found that intersexual selection prefers brightly colored individuals due to potential health conditions,while intrasexual color is more likely to represent rank and individual competitive desire.Mandrills(Mandrillus sphinx)and rhesus macaques(Macaca mulatta)are the main study subjects in skin coloration studies.The color signal is analyzed in most studies but pelage coloration is rarely involved.Overall,the physiological mechanisms and genetic expression related to phenotypic coloration need to be further explored.Visual model is a more accurate color signal receiving method than spectroscopy and digital photography,but digital photography is a more convenient and operable method in most of the current re-search conditions.
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