Fluctuating asymmetry in antlers of Alaskan moose: size matters
Bowyer RT, Stewart KM, Kie JG, Gasaway WC. 2001. Fluctuating asymmetry in antlers of Alaskan moose: size matters. Journal of Mammalogy. 82(3):814-824
We studied characteristics of paired antlers, including types of asymmetry, from 1,501 Alaskan moose (Alces alces gigas). We observed no evidence of antisymmetry in moose antlers, but number of tines was greater on left than right antlers, indicating directional asymmetry. Absolute and relative fluctuating asymmetry (FA) occurred for palm characteristics but not for beam circumference. Relative FA varied inversely with the overall size of antlers for attributes of the palm, which was expected for a secondary sexual characteristic. Smaller-antlered males exhibited greater FA than did larger-antlered moose in palm characteristics. Because large-antlered males, which mate most often among moose and other polygynous cervids, expressed the least relative FA, we hypothesize that this metric indicates quality of individual moose. Whether symmetry of antlers is related to antler breakage or honest advertisement or whether females select mates based on FA is unknown and deserves additional study.
- Type
- Journal Article
- Authors
- Bowyer, R; Stewart, K; Kie, J; Gasaway, W
- Units
- CAKN , DENA , YUCH , WRST
- Keywords
- alaskan moose, Alces alces gigas, antisymmetry, antler size, dama-dama, developmental stability, directional asymmetry, fallow deer, Fitness, fluctuating asymmetry, honest advertisement, Indicators, individual differences, individual quality, mate selection, Populations, secondary sexual characteristics, senescence, sexual selection