Advanced search
Add to list

Juvenile coloration of Florida scrub-jays (Aphelocoma coerulescens) is sexually dichromatic and correlated with condition

(2008) JOURNAL OF ORNITHOLOGY. 149(3). p.357-363
Author
Organization
Abstract
The Florida Scrub-Jay is a monogamous cooperative breeder in which both males and females display extensive structurally based blue plumage. Juveniles of this species exhibit blue tail and wing feathers that they begin growing as nestlings, and some of these feathers are retained throughout their first year. Although the birds appear to be sexually monochromatic, we assessed whether cryptic dichromatism exists in both the magnitude and pattern of coloration in tail feathers of juvenile Florida Scrub-Jays. We then determined whether variation in plumage coloration is associated with nutritional condition during molt. Tails of juvenile male Florida Scrub-Jays exhibit a greater proportion of UV reflectance than those of females. Mass at age 11 days and ptilochronology of the juvenile tail feathers were used as measures of individual nutritional condition during feather growth, and the latter was found to be positively associated with UV chroma. These data demonstrate that Florida Scrub-Jays are sexually dichromatic and suggest that variation in plumage color may be condition dependent, although we cannot rule out alternative explanations. Juvenile plumage coloration, therefore, has the potential to function as a signal of individual quality in both males and females.
Keywords
condition-dependent traits, ptilochronology, sexual dichromatism, structural color, UV coloration, NESTLING BLUE TITS, NUTRITIONAL CONDITION, EASTERN BLUEBIRDS, PLUMAGE COLOR, SELECTION, SEX, PTILOCHRONOLOGY, EVOLUTION, SIGNALS, CHICKS

Citation

Please use this url to cite or link to this publication:

MLA
Siefferman, Lynn et al. “Juvenile Coloration of Florida Scrub-jays (Aphelocoma Coerulescens) Is Sexually Dichromatic and Correlated with Condition.” JOURNAL OF ORNITHOLOGY 149.3 (2008): 357–363. Print.
APA
Siefferman, L., Shawkey, M., Bowman, R., & Woolfenden, G. E. (2008). Juvenile coloration of Florida scrub-jays (Aphelocoma coerulescens) is sexually dichromatic and correlated with condition. JOURNAL OF ORNITHOLOGY, 149(3), 357–363.
Chicago author-date
Siefferman, Lynn, Matthew Shawkey, Reed Bowman, and Glen E Woolfenden. 2008. “Juvenile Coloration of Florida Scrub-jays (Aphelocoma Coerulescens) Is Sexually Dichromatic and Correlated with Condition.” Journal of Ornithology 149 (3): 357–363.
Chicago author-date (all authors)
Siefferman, Lynn, Matthew Shawkey, Reed Bowman, and Glen E Woolfenden. 2008. “Juvenile Coloration of Florida Scrub-jays (Aphelocoma Coerulescens) Is Sexually Dichromatic and Correlated with Condition.” Journal of Ornithology 149 (3): 357–363.
Vancouver
1.
Siefferman L, Shawkey M, Bowman R, Woolfenden GE. Juvenile coloration of Florida scrub-jays (Aphelocoma coerulescens) is sexually dichromatic and correlated with condition. JOURNAL OF ORNITHOLOGY. 2008;149(3):357–63.
IEEE
[1]
L. Siefferman, M. Shawkey, R. Bowman, and G. E. Woolfenden, “Juvenile coloration of Florida scrub-jays (Aphelocoma coerulescens) is sexually dichromatic and correlated with condition,” JOURNAL OF ORNITHOLOGY, vol. 149, no. 3, pp. 357–363, 2008.
@article{7176767,
  abstract     = {The Florida Scrub-Jay is a monogamous cooperative breeder in which both males and females display extensive structurally based blue plumage. Juveniles of this species exhibit blue tail and wing feathers that they begin growing as nestlings, and some of these feathers are retained throughout their first year. Although the birds appear to be sexually monochromatic, we assessed whether cryptic dichromatism exists in both the magnitude and pattern of coloration in tail feathers of juvenile Florida Scrub-Jays. We then determined whether variation in plumage coloration is associated with nutritional condition during molt. Tails of juvenile male Florida Scrub-Jays exhibit a greater proportion of UV reflectance than those of females. Mass at age 11 days and ptilochronology of the juvenile tail feathers were used as measures of individual nutritional condition during feather growth, and the latter was found to be positively associated with UV chroma. These data demonstrate that Florida Scrub-Jays are sexually dichromatic and suggest that variation in plumage color may be condition dependent, although we cannot rule out alternative explanations. Juvenile plumage coloration, therefore, has the potential to function as a signal of individual quality in both males and females.},
  author       = {Siefferman, Lynn and Shawkey, Matthew and Bowman, Reed and Woolfenden, Glen E},
  issn         = {0021-8375},
  journal      = {JOURNAL OF ORNITHOLOGY},
  keywords     = {condition-dependent traits,ptilochronology,sexual dichromatism,structural color,UV coloration,NESTLING BLUE TITS,NUTRITIONAL CONDITION,EASTERN BLUEBIRDS,PLUMAGE COLOR,SELECTION,SEX,PTILOCHRONOLOGY,EVOLUTION,SIGNALS,CHICKS},
  language     = {eng},
  number       = {3},
  pages        = {357--363},
  title        = {Juvenile coloration of Florida scrub-jays (Aphelocoma coerulescens) is sexually dichromatic and correlated with condition},
  url          = {http://dx.doi.org/10.1007/s10336-008-0289-7},
  volume       = {149},
  year         = {2008},
}

Altmetric
View in Altmetric
Web of Science
Times cited: