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Further Examples of Variation of Populations of Cepaea nemoralis with Habitat

J. D. Currey, R. W. Arnold and M. A. Carter
Evolution
Vol. 18, No. 1 (Mar., 1964), pp. 111-117
DOI: 10.2307/2406425
Stable URL: http://www.jstor.org/stable/2406425
Page Count: 7
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Further Examples of Variation of Populations of Cepaea nemoralis with Habitat
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Abstract

(1) A survey has been made of the populations of Cepaea nemoralis in a small area of lowland agricultural country about 30 miles from Oxford. (2) As in the Oxford district, samples taken from woodland populations have, in general, proportionally fewer yellow shells, and more effectively unbanded shells than those taken from populations living in more open habitats. (3) These results tend to confirm the hypothesis that, in parts of England at least, selection by visual predators is very important in the determination of gene frequencies in Cepaea nemoralis.

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