dichromatism


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dichromatism

[dī′krō·mə‚tiz·əm]
(medicine)
Partial color blindness in which vision is apparently based on two primary colors rather than the normal three.
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References in periodicals archive ?
50] at sex change and for enhancing the description of the growth of females and males are likely to be applicable to many of the numerous species that exhibit a similar form of sexual dichromatism.
1995) first documented sexual dichromatism in spotted sand bass as males with high contrast dark bars over a white background with a white chin, whereas females were overall darker with dark bars over a medium toned green-gray background with a yellow chin.
A few studies have examined sexual dichromatism in birds within the context of a phylogeny.
The presence of sexual dichromatism in teleosts (usually displayed by males, but also by females of several groups) is typically associated with an increase in conspicuousness.
giantism and dwarfism, elongated and shortened bills, feathered tarsi, supernumerary tail feathers, hypertrophied nose and eye ceres, frontal and occipital crests, colors of irises and orbital rings, sexual dichromatism as well as various plumage patterns.
Sexual dichromatism (Medveditsyna, 1962; Rutenberg, 1962) and behavioral changes in males (Nichol and Somerton, 2002; Lauth et al.
Conversely, monochromatic fishes often exhibit patterns of seasonal sexual dichromatism during the spawning season, and these color patterns are only adopted by actively breeding individuals (Thresher 1984; Kodric-Brown 1998).
First, a comparative study relating sexual dichromatism in birds to species richness revealed larger numbers of species in taxa containing higher proportions of sexually dichromatic species (Barraclough et al.
Both sexes are illustrated for species that exhibit sexual dichromatism, such as wrasses, parrotfishes, and triggerfishes.