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- W2044142893 abstract "Honest advertisement models posit that sexually selected traits are costly to produce, maintain or otherwise bear. Brightly coloured feathers are thought to be classic examples of these models, but evidence for a cost in feathers not coloured by carotenoid pigments is scarce. Unlike pigment-based colours, iridescent feather colours are produced by light scattering in modified feather barbules that are characteristically flattened and twisted towards the feather surface. These modifications increase light reflectance, but also expose more surface area for water adhesion, suggesting a potential trade-off between colour and hydrophobicity. Using light microscopy, spectrometry, contact angle goniometry and self-cleaning experiments, we show that iridescent feathers of mallards, Anas platyrhynchos, are less hydrophobic than adjacent non-iridescent feathers, and that this is primarily caused by differences in barbule microstructure. Furthermore, as a result of this decreased hydrophobicity, iridescent feathers are less efficient at self-cleaning than non-iridescent feathers. Together, these results suggest a previously unforeseen cost of iridescent plumage traits that may help to explain the evolution and distribution of iridescence in birds." @default.
- W2044142893 created "2016-06-24" @default.
- W2044142893 creator A5003112410 @default.
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- W2044142893 date "2011-07-01" @default.
- W2044142893 modified "2023-10-16" @default.
- W2044142893 title "Decreased hydrophobicity of iridescent feathers: a potential cost of shiny plumage" @default.
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- W2044142893 doi "https://doi.org/10.1242/jeb.055822" @default.
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