Can color vision variation explain sex differences in invertebrate foraging by capuchin monkeys?  

作　　者：Amanda D.MELIN Linda M.FEDIGAN Hilary C.YOUNG Shoji KAWAMURA 

机构地区：[1]Department of Anthropology,University of Calgary [2]Department of Biological Sciences,University of Calgary [3]Department of Integrated Biosciences,Graduate School of Frontier Sciences,University of Tokyo

出　　处：《Current Zoology》2010年第3期300-312,共13页动物学报（英文版）

基　　金：supported by grants from The Leakey Foundation;the Alberta Ingenuity Fund;the Animal Behavior Society;the National Sciences and Engineering Research Council of Canada (NSERC);NSERC and the Canada Research Chairs Program;the Grants-in-Aid for Scientific Research (B) (16405015);(A) (19207018) from JSPS

摘　　要：Invertebrates are the main source of protein for many small-to-medium sized monkeys. Prey vary in size, mobility, degree of protective coveting, and use of the forest, i.e. canopy height, and whether they are exposed or embed themselves in substrates. Sex-differentiation in foraging patterns is well documented for some monkey species and recent studies find that color vision phenotype can also affect invertebrate foraging. Since vision phenotype is polymorphic and sex-linked in most New World monkeys - males have dichromatic vision and females have either dichromatic or trichromatic vision - this raises the possibility that sex differences are linked to visual ecology. We tested predicted sex differences for invertebrate foraging in white-faced capuchins Cebus capucinus and conducted 12 months of study on four free-ranging groups between January 2007 and September 2008. We found both sex and color vision effects. Sex： Males spent more time foraging for invertebrates on the ground. Females spent more time consuming embedded, colonial invertebrates, ate relatively more ＂soft＂ sedentary invertebrates, and devoted more of their activity budget to invertebrate foraging. Color Vision： Dichromatic monkeys had a higher capture efficiency of ex- posed invertebrates and spent less time visually foraging. Trichromats ate relatively more ＂hard＂ sedentary invertebrates. We con- elude that some variation in invertebrate foraging reflects differences between the sexes that may be due to disparities in size, strength, reproductive demands or niche preferences. However, other intraspecific variation in invertebrate foraging that might be mistakenly attributed to sex differences actually reflects differences in color vision [Current Zoology 56 （3）： 300-312, 2010].

关 键 词：Male Foraging Female Foraging CEBUS Dichromacy Trichromaey Invertebrate Foraging 

分 类 号：Q43[生物学—生理学]