Variability, heritability and condition-dependence of the multidimensional male colour phenotype in a passerine bird

Marie Fan, Michelle Hall, Michael Roast, Anne Peters & Kaspar Delhey
Elaborate ornamental traits are commonly assumed to be honest signals of individual quality, owing to the presumed costs involved in their production and/or maintenance. Such traits are often highly variable, possibly because of condition-dependence and/or high underlying genetic variation, and it has been suggested that their expression should be more sensitive to condition and/or more heritable than non-ornamental traits. Many bird species display colourful plumage with multiple distinct patches of different developmental origins, forming complex...
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