How feather colour reflects its melanin content
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چکیده
منابع مشابه
How feather colour reflects its melanin content
1. Melanin coloration is the most common type of colour in animals. Many species use melanin-based black, brown, grey or earth-toned colours as intraspecific signals of quality. 2. Melanin comes in two main forms in vertebrates – eumelanin and phaeomelanin – and these are said to create different colours, with eumelanin giving a darker black, brown or grey appearance and phaeomelanin a lighter ...
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1. Many birds sequester carotenoid pigments in colourful patches of feathers to advertise or compete for mates. Because carotenoids can be scarce in nature and serve valuable physiological functions, only the highest-quality individuals are thought to acquire or allocate more pigments for use in sexual displays. 2. A critical but rarely tested assumption of carotenoid-based signals is that the ...
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Thomas W. Pike*, Bjørn Bjerkeng, Jonathan D. Blount, Jan Lindström and Neil B. Metcalfe Division of Ecology and Evolutionary Biology, Faculty of Biomedical & Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK; Nofima Marine AS (formerly Akvaforsk, Institute of Aquaculture Research AS), N-6600 Sunndalsøra, Norway; and Centre for Ecology and Conservation, School of Bi...
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Melanin is the main pigment in animal coloration and considerable variation in the concentrations of the two melanin forms (pheo- and eumlanin) in pigmented tissues exists among populations and individuals. Melanin-based coloration is receiving increasing attention particularly in socio-sexual communication contexts because the melanocortin system has been hypothesized to provide a mechanistic ...
متن کاملIridescent structural colour production in male blue-black grassquit feather barbules: the role of keratin and melanin.
Iridescent coloration plays an important role in the visual communication system of many animal taxa. It is known that iridescent structural colours result from layers of materials with different refractive indexes, which in feathers usually are keratin, melanin and air. However, the role of these materials in the production of structural iridescent coloration is still poorly documented. Despit...
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ژورنال
عنوان ژورنال: Functional Ecology
سال: 2005
ISSN: 0269-8463,1365-2435
DOI: 10.1111/j.1365-2435.2005.01032.x