Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Dessication and distribution studies of the intertidal snails Littorina planaxis and Littorina scutulata
Student Author(s): Van Wyk, Peter
Faculty Advisor(s): Wagenbach, Gary
Pages: 20
Location: Research Reports Carleton College Biology 212
Date: March 1976
Abstract: The purpose of the study was to examine the effects of prolonged dessication on Littorina planaxis and Littorina scutulata and to see if any differences in tolerance to dessication are reflected in their vertical distribution. The numbers of the two species of snail were counted on a granite boulder with a broad vertical surface oriented parallel to the shoreline. Forty snails were kept in a dessicating chamber and weighed daily to determine differences in the resistances to dessication. Dessication studies showed that L.planaxis is more resistant to dessication than L. scutulata, and large snails are more resistant than small snails. Dessication data was found to correlate with the vertical distribution of the Littorinas.