title: Fitness correlates of spur length and spur asymmetry in male wild turkeys.
abstract: 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.
authors.affiliation: Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USAMontana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT 59812, USA.
authors.forename: A V
authors.initials: AV
authors.lastname: Badyaev
authors.affiliation: Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USAMontana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT 59812, USA.
authors.forename: W J
authors.initials: WJ
authors.lastname: Etges
authors.affiliation: Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USAMontana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT 59812, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Faust
authors.affiliation: Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USAMontana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT 59812, USA.
authors.forename: T E
authors.initials: TE
authors.lastname: Martin
keywords: Meleagris gallopavo; fluctuating asymmetry; sexual selection; tarsal spurs