(full paper is archived in the Miller Library)
Title: Shell preference and gregariousness of Crepidula adunca
Student Author(s): Nieman, Bob
Williams, Dean E.
Faculty Advisor(s): Wagenbach, Gary
Location: Research Reports Carleton College Biology 212
Date: November 1983
Abstract: The protandric marine prosobrach, Crepidula adunca, is commensally associated with a variety of gastropods in the intertidal and subtidal zones. When various shells were tested against its predominant host, Tegula funebralis, C. adunca showed no preference for attachment. No obvious descrimination due to shell shape was observed, although C. adunca generally avoided sculptured shells and highly mobile snails. High incidence of C. adunca on T. funebralis was attributed to the prevalence of T. funebralis in the intertidal zone rather than the preferential selection of T. funebralis as a host. A phototaxic test revealed that C. adunca did not respond to light.
C. adunca was also found to show little attraction between indiviuals of the same species unlike that observed in other species. Results are compared to those of Hoagland (1978) who placed C. adunca with C. convexa because of similarities in life history. Our results show that C. adunca is closer to C. convexa in gregariousness than other Crepidula species mentioned, affirming Hoagland's suggestion.