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Fitness correlates of spur length and spur asymmetry in male wild turkeys
Article first published online: 10 FEB 2003
DOI: 10.1046/j.1365-2656.1998.6760845.x
1365-2656/asset/cover.gif?v=1&s=e1c445961d632cd41e33852af907c4900097559b "Journal of Animal Ecology")
Additional Information
How to Cite
Shorrocks, B., Albon, S., BADYAEV, A. V., ETGES, W. J., FAUST, J. D. and MARTIN, T. E. (1998), Fitness correlates of spur length and spur asymmetry in male wild turkeys. Journal of Animal Ecology, 67: 845–852. doi: 10.1046/j.1365-2656.1998.6760845.x
Publication History
- Issue published online: 10 FEB 2003
- Article first published online: 10 FEB 2003
- Received 18 September 1997; revision received 2 February 1998
- Abstract
- References
- Cited By
Keywords:
- fluctuating asymmetry;
- Meleagris gallopavo;
- sexual selection;
- tarsal spurs
Summary
Tarsal spurs play an important role in intrasexual competition for females among male wild turkeys (Meleagris gallopavo). Thus variation in spur development may have important fitness consequences.
Fitness correlates of spur development were studied in a free-living population of wild turkeys and it was found that heavier males and males with longer beards had longer spurs. Males that had longer spurs spent more time on display areas during the breeding season and less time moving among these areas compared to males with shorter spurs, independently of their body mass.
Otherwise ideally symmetrical spurs showed fluctuating asymmetry between left and right tarsi, the degree of absolute asymmetry decreased with spur length in adults, but not in subadults, and males that survived at least one winter had more symmetrical spurs compared to males that did not.
We conclude that if the ability to produce symmetrical spurs has a genetic basis, then spur length and spur asymmetry could reliably indicate individual quality and that these traits are under directional selection for increased size and symmetry in wild turkeys.