Body condition influences sexual signal expression independent of circulating androgens in male red-backed fairy-wrens

Barron, Douglas G.; Webster, Michael S.; Schwabl, Hubert

doi:10.1016/j.ygcen.2012.12.005

Cited by 18 publications

(30 citation statements)

References 33 publications

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“…; Barron et al. ). Here, however, we experimentally induced colorful plumage production in a wintering migratory bird and failed to find support for these predictors.…”

Section: Discussionmentioning

confidence: 97%

“…; but see Barron et al. ). Elucidating these relationships requires observing the growth of colorful feathers in different winter habitats within individuals in variable condition, and measuring effects on resulting coloration.…”

Section: Introductionmentioning

confidence: 97%

“…; Barron et al. ), dominant individuals in high‐quality habitats should have an advantage in producing and maintaining high‐quality plumage. In addition, the acquisition of high‐quality plumage may be influenced by the timing and duration of molt (Griggio et al.…”

Section: Introductionmentioning

confidence: 99%

“…Indirectly, food availability within a habitat may limit body condition (e.g., Studds and Marra ) which could in turn limit plumage quality (e.g., Hill and Montgomerie ; Barron et al. ). If the social environment varies among habitats, this could in turn mediate the acquisition, development, and/or expression of ornamental traits (Karubian et al.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, developing high-quality ornaments and maintaining their quality throughout the year may be critically important to maximizing fitness. For colorful plumage limited by the environmental availability of pigments (e.g., carotenoids; Hill 1992), social factors (e.g., social dominance; Karubian et al 2011;Maia et al 2012), or physical condition (e.g., Saks et al 2003;Barron et al 2013), dominant individuals in high-quality habitats should have an advantage in producing and maintaining high-quality plumage. In addition, the acquisition of high-quality plumage may be influenced by the timing and duration of molt (Griggio et al 2009;Newton and Dawson 2011;Stutchbury et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Color expression in experimentally regrown feathers of an overwintering migratory bird: implications for signaling and seasonal interactions

Tonra

Marini

Marra

et al. 2014

Ecology and Evolution

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Plumage coloration in birds plays a critical role in communication and can be under selection throughout the annual cycle as a sexual and social signal. However, for migratory birds, little is known about the acquisition and maintenance of colorful plumage during the nonbreeding period. Winter habitat could influence the quality of colorful plumage, ultimately carrying over to influence sexual selection and social interactions during the breeding period. In addition to the annual growth of colorful feathers, feather loss from agonistic interactions or predator avoidance could require birds to replace colorful feathers in winter or experience plumage degradation. We hypothesized that conditions on the wintering grounds of migratory birds influence the quality of colorful plumage. We predicted that the quality of American redstart (Setophaga ruticilla) tail feathers regrown after experimental removal in Jamaica, West Indies, would be positively associated with habitat quality, body condition, and testosterone. Both yearling (SY) and adult (ASY) males regrew feathers with lower red chroma, suggesting reduced carotenoid content. While we did not observe a change in hue in ASY males, SY males shifted from yellow to orange plumage resembling experimentally regrown ASY feathers. We did not observe any effects of habitat, testosterone, or mass change. Our results demonstrate that redstarts are limited in their ability to adequately replace colorful plumage, regardless of habitat, in winter. Thus, feather loss on the nonbreeding grounds can affect social signals, potentially negatively carrying over to the breeding period.

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“…; Barron et al. ). Here, however, we experimentally induced colorful plumage production in a wintering migratory bird and failed to find support for these predictors.…”

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Color expression in experimentally regrown feathers of an overwintering migratory bird: implications for signaling and seasonal interactions

Tonra

Marini

Marra

et al. 2014

Ecology and Evolution

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Age and reproductive strategies in European Starlings (Sturnus vulgaris)

Barber,

Slade,

Hornsby

et al. 2024

J Ornithol

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A test of the effect of testosterone on a sexually selected carotenoid trait in a cardueline finch

Trigo

Mota

2014

Ecological Research

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A great number of secondary sexual traits are assumed to have evolved as honest signals of individual quality. It is known that androgens regulate many male secondary traits as well as reproductive behavior. The expression of melanin‐based coloration is modulated by androgens, particularly testosterone, and there is some evidence that carotenoid‐based coloration may also be under androgen control. In the European serin, Serinus serinus, male carotenoid‐based plumage coloration is a sexually selected trait, subjected to female choice. In this experiment, we investigated if testosterone influences the expression of this trait by manipulating testosterone levels during molt and assessing how it affected plumage color expression after molt. We found that testosterone had only a negative effect on the size of the yellow ornament. Our experiment shows that testosterone had a limited effect on carotenoid‐based coloration of a cardueline finch.

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Body condition influences sexual signal expression independent of circulating androgens in male red-backed fairy-wrens

Cited by 18 publications

References 33 publications

Color expression in experimentally regrown feathers of an overwintering migratory bird: implications for signaling and seasonal interactions

Color expression in experimentally regrown feathers of an overwintering migratory bird: implications for signaling and seasonal interactions

Age and reproductive strategies in European Starlings (Sturnus vulgaris)

A test of the effect of testosterone on a sexually selected carotenoid trait in a cardueline finch

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