(full paper is archived in the Miller Library)
Title: An investigation of DDT degradation in the starfish, sea urchin, and mussel
Student Author(s): Davis, Jeffrey D.
Faculty Advisor(s): Epel, David
Location: Final Papers Biology 175H
Date: June 1969
Abstract: Previous studies of enzymatic degradation of DDT generally have been limited to species showing evidence of the development of resistance to prolonged exposure to high levels of DDT. In this study we attempted to determine whether similar mechanisms of enzymatic degradation of DDT also exist in three marine invertebrates. Under the conditions of these experiments, Pisaster ochraceous, Strongylocentrotus purpuratus, and Mytilus californianus show no evidence of enzymatic degradation of DDT to DDE or DDD. This observation implies that the DDE and DDD residues found in these species by Risebrough are the result of direct uptake of these DDT derivatives from the marine environment.