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Locomotor Activity Patterns of the Roman Garden Snail (Helix Pomatia L.) in Light and Dark Conditions
Orin G. Gelderloos
The American Midland Naturalist
Vol. 101, No. 1 (Jan., 1979), pp. 218-222
Published by: The University of Notre Dame
Stable URL: http://www.jstor.org/stable/2424915
Page Count: 5
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Locomotor activity of the Roman garden snail (Helix pomatia) was recorded in constant dark (DD), constant light (LL) and a light/dark cycle (LD 12: 12) by means of individual activity chambers. In conditions of LD 12: 12 a distinct activity rhythm coincided with the light/dark cycle; most activity was nocturnal. The laboratory recordings correlated well with field observation. The snails responded to light onset with a burrowing or light-avoidance response; a distinct response to dark onset was not observed. No rhythmic patterns of activity were found in either DD or LL. It is possible that activity in this species may be stimulated or inhibited by several environmental factors such as light, moisture and mechanical vibrations. It is suggested that the lack of an endogenous activity rhythm under constant conditions may be advantageous for Helix pomatia.
The American Midland Naturalist © 1979 The University of Notre Dame