(full paper is archived in the Miller Library)
Title: The dispersal of young of the commensal gastropod Crepidula adunca from its host, Tegula funebralis
Student Author(s): Putnam, Deborah A.
Location: Final Papers Biology 175H
Date: June 1963
Keywords: black turban snail
Abstract: Crepidula adunca is a protandric marine prosobranch commonly found on the shells of Tegula funebralis. Female C. adunca are oriented in a consistent manner on the whorls of the T. funebralis shell. There is no free swimming larval stage; the brooded young crawl or are pushed out from under the mother as juveniles similar in form to the adults. The newly hatched spat are very motile; the great majority drop off the host and sink. Weak water currents stimulate the spat; there is net orientation into current, against gravity, and toward moderate light. Spat are only weakly attracted to either T. funebralis or older C. adunca; this attraction is clearly present in older individuals.
Notes: Published 1964, Veliger 6(suppl.): 63-66