Plumage coloration, ejaculate quality and reproductive phenotype in the red-backed fairy-wren
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چکیده
* Correspondence and present address: M. Rowe, Sc State University, P.O. Box 874501, Tempe, AZ 85287-4 E-mail address: [email protected] (M. Rowe 1 J. P. Swaddle is at the Institute for Integrative B Department, College of William and Mary, Williamsb 2 S. Pruett-Jones is at the Department of Ecology Chicago, 1101 East 57th Street, Chicago, IL 60637-150 3 M. S. Webster is now at the Macaulay Library of N Ornithology, 159 Sapsucker Woods Road, Ithaca, NY 1
منابع مشابه
Costs and benefits of variable breeding plumage in the red-backed fairy-wren.
The red-backed fairy-wren is a socially monogamous passerine bird which exhibits two distinct types of breeding male, bright males that breed in bright red and black plumage and dull males that breed in dull brown plumage. Most males spend their first potential breeding season in dull plumage and subsequent breeding seasons in bright plumage, but a relatively small proportion of males develop b...
متن کاملSexually Selected Male Plumage Color Is Testosterone Dependent in a Tropical Passerine Bird, the Red-Backed Fairy-Wren (Malurus melanocephalus)
BACKGROUND Sexual signals, such as bright plumage coloration in passerine birds, reflect individual quality, and testosterone (T) may play a critical role in maintaining signal honesty. Manipulations of T during molt have yielded mixed effects on passerine plumage color, in most cases delaying molt or leading to production of drab plumage. However, the majority of these studies have been conduc...
متن کاملExperimental evidence that extra-pair mating drives asymmetrical introgression of a sexual trait.
Theory suggests that traits under positive selection may introgress asymmetrically across a hybrid zone, potentially driven by sexual selection. Two subspecies of the red-backed fairy-wren (Malurus melanocephalus) differ primarily in a sexual signal used in mate choice-red versus orange male back plumage colour-but phylogeographic analyses suggest asymmetrical introgression of red plumage into ...
متن کاملTestosterone activates sexual dimorphism including male-typical carotenoid but not melanin plumage pigmentation in a female bird.
In males it is frequently testosterone (T) that activates the expression of sexually selected morphological and behavioral displays, but the role of T in regulating similar traits in females is less clear. Here, we combine correlational data with results from T and gonadotropin-releasing hormone (GnRH) manipulations in both sexes to assess the role of T in mediating sexually dimorphic coloratio...
متن کاملBody condition influences sexual signal expression independent of circulating androgens in male red-backed fairy-wrens.
Androgens play a major role in the regulation of sexual signal expression of male vertebrates. In this study we assessed the prevalent, yet largely untested, assumption that signal honesty is maintained through condition-dependent androgen regulation by experimentally manipulating body condition of male red-backed fairy-wrens (Malurus melanocephalus) through trimming several flight feathers bef...
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تاریخ انتشار 2010