melanism

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melanosis

 [mel″ah-no´sis]
1. disordered melanin production, with darkening of the skin; called also melanism.
2. a disorder of pigment metabolism.
melanosis co´li brown-black discoloration of the mucosa of the colon.
melanosis i´ridis (melanosis of the iris) abnormal pigmentation of the iris by infiltration of melanoblasts.

mel·a·nism

(mel'ă-nizm),
Unusually marked, diffuse, melanin pigmentation of body hair and skin (usually not affecting the iris).
See also: melanosis.

melanism

/mel·a·nism/ (mel´ah-nizm) melanosis.

melanism

(mĕl′ə-nĭz′əm)
n.
1. See melanosis.
2. Dark coloration of the skin, hair, fur, or feathers because of a high concentration of melanin.

mel′a·nis′tic adj.

melanism

[mel′əniz′əm]
Etymology: Gk, melas, black
an abnormal deposit of dark brown to black melanin pigment in the skin, hair, and other tissues. Also called melanosis.

mel·a·nism

(mel'ă-nizm)
Unusually marked, diffuse melanin pigmentation of body hair and skin (usually not affecting the iris).
See also: melanosis

melanism

a condition in which excessive production of MELANIN produces unusual dark colour or blackness in scales, skin or plumage. see INDUSTRIAL MELANISM.

melanism

excessive deposition of melanin in the skin.
References in periodicals archive ?
Our findings for the first test of the model to predict the plastron length for melanistic males are noteworthy.
In garter snakes, the striped/ checked pattern is more disruptive and the coloration matches the background more closely than melanistic coloration.
During the current year of intensive tiger monitoring under Phase IV of National Tiger Estimation in the Dandeli- Anshi reserve, the project led by Karanth threw up a unique photo- capture of a family of leopards having two spotted and one melanistic leopard.
While not recognizing laboriosa, Bequaert (1944) thought it was a melanistic form of minutissima (Spinola), as mentioned above; Richards (1978:143) speculated laboriosa might be exigua binominata in his sense, but also noted "A female labeled laboriosa in the Mus.
1996) pointed out that aggression from familiar melanistic males may have been a factor contributing to female Gambusia's preference for normal over melanistic males.
He runs for the 20-strong Highflyers syndicate, so called because a number of them shoot at Angmering, and Max says: "Nanton Point's colours are melanistic, which is something to do with pheasant feathers.
The habitat will showcase two new residents to the Jungle, a spotted leopard and a melanistic (or black) leopard.
Melanistic males tend to be older and larger than non-melanistic males within a population, but in T.
THANKS to Pat Houghton, who sent me pictures of the melanistic pheasants which visit her Irby garden on Wir-ral.
This rare condition seems to be some type of genetic aberration--just like the occasional melanistic or black deer.