Abstract
Hygromia striolata (C. Pfeiffer) is polymorphic for shell and mantle colour. Thirty-two samples were taken from natural populations in the region of Malham, Yorkshire. The samples were taken in pairs, one member of each pair from a habitat with a relatively dark background and one from a nearby habitat with a relatively light background. In general, samples from “darker” habitats had higher proportions of the dark-shelled and dark-bodied morphs. These associations are highly significant, and they can most easily be explained in terms of visual selection by predators.
Original language | English |
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Pages (from-to) | 102-106 |
Number of pages | 5 |
Journal | Heredity |
Volume | 33 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1974 |