(full paper is archived in the Miller Library)
Title: Shell damage and repair in five members of the genus Acmaea (Mollusca: Gastropoda: Prosobranchia)
Student Author(s): Bulkley, P. Todd
Faculty Advisor(s): Abbott, Don
Location: Final Papers Biology 175H
Date: June 1966
Abstract: Examination of naturally damaged shells of Acmaea scabra, A. digitalis, A. pelta, A. scutum, and A. limatula showed that damage to the margin due to chipping predominated, but shells were found with regions near the apex crushed, with severe erosion by a fungus, with cracks extending from the edge to near the apex, with the tops eroded apparently by barnacles, and with small holes of unknown origin near the apex. A scutum was the species most commonly damaged. Repair was always accomplished by the secretion of new nacreous layers below the damaged portion. Rates of repair of artifically damaged shell margins exceed rates of growth where the margin remains intact.
Notes: Published 1968, Veliger 11(Suppl): 64-66