Ornamental bill color rapidly signals changing condition
نویسندگان
چکیده
M. F. Rosenthal and K. A. Tarvin ([email protected]), Dept of Biology, Oberlin College, OH 44074, USA. Present address of MFR: School of Biological Sciences, Univ. of Nebraska, Lincoln, NE 68588-0118, USA. – T. G. Murphy, Dept of Biology, Queen’s Univ., Kingston, ON K7L 3N6, Canada. Present address of TGM: Dept of Biology, Trinity Univ., San Antonio, TX 78212, USA. – N. Darling, Dept of Psychology, Oberlin College, OH 44074, USA.
منابع مشابه
Carotenoid-Based Ornaments of Female and Male American Goldfinches (Spinus tristis) Show Sex-Specific Correlations withImmune Function and Metabolic Rate Author(s):
Conspicuous ornamentation has been linked to immunological and physiological condition in males of many species. In species where both sexes are ornamented, it is unclear whether the signal content of ornaments differs between males and females. We examined the immunological and physiological correlates of carotenoid-based bill and plumage ornamentation in American goldfinches Spinus tristis, a...
متن کاملCarotenoid-Based Ornaments of Female and Male American Goldfinches (<italic>Spinus tristis</italic>) Show Sex-Specific Correlations withImmune Function and Metabolic Rate
Conspicuous ornamentation has been linked to immunological and physiological condition in males of many species. In species where both sexes are ornamented, it is unclear whether the signal content of ornaments differs between males and females. We examined the immunological and physiological correlates of carotenoid-based bill and plumage ornamentation in American goldfinches Spinus tristis, a...
متن کاملCarotenoid-based ornaments of female and male American goldfinches (Spinus tristis) show sex-specific correlations with immune function and metabolic rate.
Conspicuous ornamentation has been linked to immunological and physiological condition in males of many species. In species where both sexes are ornamented, it is unclear whether the signal content of ornaments differs between males and females. We examined the immunological and physiological correlates of carotenoid-based bill and plumage ornamentation in American goldfinches Spinus tristis, a...
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Social defeat induces stress-responses in a wide array of vertebrates and can generate winner-loser effects. Dynamic condition-dependent signaling systems that reflect preparation for subsequent agonistic interactions, and thereby mediate winner-loser effects, should be more sensitive to competitive history than to non-social sources of stress. Bill color of female American goldfinches (Spinus ...
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Bright coloration in male birds is typically thought to be driven by sexual selection (female choice or male–male competition). Bird species often vary in the intensity of bright coloration, but few studies have addressed this cross-species variation. Potentially this variation could result from either variation in female preferences or in the relative costs of male traits. Species of dabbling ...
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