melanic

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melanic

[me′lan·ik]
(geology)
References in periodicals archive ?
So I set up our problem: "Industrial melanism is a fascinating example--the same effect was measured in England and the northeastern United States in the same species as pollution increased, and then the trend reversed on both sides of the Atlantic following clean-air legislation.
Maintenance of melanism in the spider Pityohyphantes phrygianus: Is bird predation a selective agent?
We also report the first test of a model for melanism in Trachemys scripta elaborated by Tucker et al.
He was cautious of formulating any theory for the marked spread of melanism over 40 years and indeed pointed out the insufficiencies of various theories.
However, melanism may provide a thermal benefit which may enhance fitness (Gibson and Falls 1988; Bittner and others 2002).
Melanism has been studied in relation to intersexual selection and the results have been somewhat ambiguous.
Temperature induced seasonal melanism in the wings of Copaeodes minima (Lepidoptera: Hesperiidae).
His study of melanism in moths was central to the debate (after Darwin) about how natural selection worked.
A more complex case is the well-known story that the peppered moth and industrial melanism constituted "evolution in action.
Melanism in the Felidae, with special reference to the genus Lynx.
collected between 17-28 Jun has an unusual degree of melanism, including stigmate apical wing margins and black terminalia (Fig.