(full paper is archived in the Miller Library)
Title: Littorina trail following; sexual preference, loss of polarized information, and trail alterations
Student Author(s): Raftery, Richard E.
Faculty Advisor(s): Gilly, William
Location: Final Papers Biology 175H
Date: June 1982
Keywords: upper intertidal
Abstract: 1) Preferential trail following is observed for all combinations of sex of snail and trail, and no apparent sex differences in percentage following are observed. 2) Preferential trail-following is observed for L. planaxis on both misted and dry trails. Trail polarity information decreases as the trail-age increases. The detectable level of polarity information decays along a time course similar to that found for submerged L. littorea trails (Gilly and Swensen, 1978). 3) Trail polarity information can be detected thru 100 micron pore size nytex screen, but cannot be detected thru 0.22 micron pore size milipore filters. 4) The cephalic tentacles of L. planaxis distal to the eye spot play no significant role in placing polarity information onto the trail.