Letter | Published:

Differential Climatic Selection in Natural Population of Land Snail Cepaea nemoralis

Naturevolume 247pages572573 (1974) | Download Citation



DURING a study of the energetics of a population of the polymorphic land snail Cepaea nemoralis L. on the sand dunes at Braunton Burrows, North Devon, numbers of dead and dying snails were collected during the daylight hours in the summer. They showed similar symptoms, being unable to retract the foot which had become dried, discoloured and unresponsive to touch stimuli. Some animals were unable to retract the optic tentacles and in some, the genitalia protruded. Snails found in this condition, although alive (as evidenced by sensitivity of the mantle area) early in the day, were usually dead by evening.

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  1. Department of Zoology, University of Tasmania, Box 252C, G.P.O., Hobart, Tasmania, 7001



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