Article
Melanic moth frequencies in Yorkshire, an old English industrial hot spot.
The Journal of heredity - 1 Jan 2000
Cook L M, Sutton S L, Crawford T J
Abstract excerpt
A survey has been carried out in Leeds, England, in the west Yorkshire industrial heartland, and in neighboring York, surrounded by agriculture, of melanic frequency in the moth species Biston betularia, Odontoptera bidentata, and Apamea crenata. All show a decline in melanics in the postindustrial environment, the first over almost the full range from nearly 100% to less that 10%, the others to smaller extents....
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