منابع مشابه
Multiple male traits interact: attractive bower decorations facilitate attractive behavioural displays in satin bowerbirds.
Sexually selected male courtship displays often involve multiple behavioural and physical traits, but little is known about the function of different traits in mate choice. Here, we examine female courtship behaviours to learn how male traits interact to influence female mating decisions. In satin bowerbirds (Ptilonorhynchus violaceus), successful males give highly aggressive, intense behaviour...
متن کاملA sense of colour
The fluorescent honeycomb above is the sensory epithelium of the mouse auditory organ, viewed in cross-section to show the cell bodies of the sensory hair cells. The bright green sensory hair cells have been infected with a viral vector that carries the gene for the green fluorescent protein (GFP). The tissue is counterstained for actin (red), which is abundant in the hair bundles and the peric...
متن کاملRelative colour cues improve colour constancy in birds.
A ripe strawberry looks red to our eyes in sunlight and in the green light of a forest, although the spectrum of light reflected from its surface differs dramatically. This is caused by two effects: colour constancy and our ability to learn relative colour cues - the ripe strawberry remains relatively 'redder' than an unripe green strawberry. While colour constancy - the ability to recognize co...
متن کاملColour polymorphism in birds: causes and functions.
We studied polymorphism in all species of birds that are presently known to show intraspecific variation in plumage colour. At least three main mechanisms have been put forward to explain the maintenance of polymorphism: apostatic, disruptive and sexual selection. All of them make partly different predictions. Our aims were to investigate evolutionary causes and adaptive functions of colour pol...
متن کاملIridescent plumage in satin bowerbirds: structure, mechanisms and nanostructural predictors of individual variation in colour.
Iridescence is produced by coherent scattering of light waves from alternating layers of materials of different refractive indices. In birds, iridescent colours are produced by feather barbules when light is scattered from alternating layers of keratin, melanin and air. The structure and organization of these layers, and hence the appearance of bird species with different types of plumage iride...
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ژورنال
عنوان ژورنال: Emu - Austral Ornithology
سال: 1920
ISSN: 0158-4197,1448-5540
DOI: 10.1071/mu919306