Pelage coloration in oldfield mice (Peromyscus polionotus): Antipredator adaptation?

被引:24
作者
Belk, MC
Smith, MH
机构
[1] BRIGHAM YOUNG UNIV,DEPT ZOOL,PROVO,UT 84602
[2] UNIV GEORGIA,SCH FOREST RESOURCES,INST ECOL,DEPT GENET,ATHENS,GA 30602
关键词
Peromyscus polionotus; crypsis; conspicuousness; pelage color; small mammals; predation;
D O I
10.2307/1382694
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Reflectance spectra (in full light and moonlight) of dorsal pelage of 469 adult oldfield mice (Peromyscus polionotus) comprising nine regional samples were compared to reflectance spectra of corresponding surface and subsurface soil samples to test for a selective effect of predation on color of pelage. Mice were slightly more reddish in hue, generally had more chroma, and were less reflective than soil at all locations. Color of pelage within locations was not significantly correlated with color of soil. Among all locations, brightness of pelage and soil were significantly positively cell-elated. Among mainland locations, there was a significant positive correlation between pelage and subsurface soil brightness. Difference between pelage color of mice and soil color (crypsis) did not differ between island and mainland locations. Regional patterns of variation in brightness of pelage provide support for the role of predation as a selective force affecting color of pelage in oldfield mice. However, variation in hue and chroma and differences in crypsis did not support a selective-predation hypothesis.
引用
收藏
页码:882 / 890
页数:9
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