期刊
AMERICAN JOURNAL OF PRIMATOLOGY
卷 74, 期 4, 页码 287-298出版社
WILEY
DOI: 10.1002/ajp.21004
关键词
courtship; speciation; punctuated evolution; phylogeny; species recognition; sexual behavior; Cebus
类别
资金
- NSF [BCS-0923791]
- New York University
- New York Consortium in Evolutionary Primatology
- Harvard University
Researchers of capuchin monkeys have noted stereotyped body postures, facial expressions, and vocalizations that accompany copulations in this genus. Notable variations in these sexual behaviors are observed across capuchin species. Although several hypotheses exist to explain variation in the duration and vigor of sexual behaviors across species, there is no proposed explanation for variation in the forms of these behaviors. I hypothesized that the forms of sexual behaviors function as recognition signals of conspecific mates. Such signals are adaptive when F1 hybrids exhibit reduced fitness compared with nonhybrid offspring. Recent evidence from nonprimate taxa supports the existence of species recognition signals during mating. Using newly observed sexual behaviors for Cebus albifrons and a recent phylogeny of capuchins, I found significant support for a key prediction of the conspecific mate recognition hypothesis: evolutionary changes in sexual behaviors were associated with speciation. Given the resultant best model for evolution of sexual behaviors, I reconstructed the ancestral pattern of sexual behaviors for extant capuchin species (genera Cebus and Sapajus). This reconstruction suggests that the extreme female proceptivity of tufted capuchin monkeys may function to increase female reproductive choices in the context of sperm-limited males (genus Sapajus). Am. J. Primatol. 74:287298, 2012. (c) 2011 Wiley Periodicals, Inc.
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