• Publications
  • Influence
Mechanics of Carotenoid-Based Coloration
  • K. McGraw
  • Biology
    Bird Coloration, Volume 1
  • 28 February 2006
Mechanics of Melanin-Based Coloration
  • K. McGraw
  • Bird Coloration, Volume 1
  • 28 February 2006
Carotenoids, Immunocompetence, and the Information Content of Sexual Colors: An Experimental Test
TLDR
Experimental findings suggest that carotenoid‐based color signals in birds may directly signal male health via the immunostimulatory action of ingested and circulated carOTenoid pigments.
Function and evolution
TLDR
A review of functional and non-functional hypotheses for female coloration in birds and a new evolutionary synthesis of bird color displays suggest that the function and evolution of color in young birds are similar.
Maternally derived carotenoid pigments affect offspring survival, sex ratio, and sexual attractiveness in a colorful songbird
TLDR
It is shown that the colorful carotenoid pigments that female zebra finches deposit into egg yolks influence embryonic and nestling survival, the sex ratio of fledged offspring, and the eventual ornamental coloration displayed by their offspring as adults.
Different colors reveal different information: how nutritional stress affects the expression of melanin- and structurally based ornamental plumage.
TLDR
Melanin ornaments are less sensitive to nutritional conditions during molt and instead may reflect the hormonal status and/or competitive ability of males, whereas structural coloration appears to be an accurate signal of health and condition.
How feather colour reflects its carotenoid content
TLDR
There does not appear to be a specific biochemical strategy for becoming colourful in greenfinches; males instead follow the general decision rule to deposit as many xanthophylls as possible into feathers to become yellow.
Dynamic Paternity Allocation as a Function of Male Plumage Color in Barn Swallows
TLDR
It is found that, in successive breeding bouts, only males whose plumage color was experimentally enhanced received greater paternity from their social mates, demonstrating evidence for flexible and dynamic paternity allocation and the importance for males of maintaining signals of quality well after pair bond formation.
Mechanisms and measurements
TLDR
This book aims to provide a history of color perception and its role in the human experience through the lens of scientific inquiry and empirical evidence.
How coccidian parasites affect health and appearance of greenfinches
TLDR
Crocidian infection reduced the expression of plumage coloration by creating a deficiency of carotenoids available for deposition in ornamental traits, suggesting serious pathology and probable nutrient malabsorption due to damaged intestinal epithelium.
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