(full paper is archived in the Miller Library)
Title: The kinetics of DDT residues in the nudibranch Hermissenda crassicornis
Student Author(s): Marian, Ronald E.
Faculty Advisor(s): Burnett, Robin
Location: Final Papers Biology 175H
Date: June 1971
Keywords: marine pollution
Abstract: Results show an equilibrium for surface uptake, establishing a constant DDT concentration in the cerata with a 5 to 10 ppt concentration in the water, a level likely to be present in the habitat. A two compartment model is proposed for the uptake mechanism. Spawning is shown to be the primary pathway for DDT output, eliminating as much as 50% of the residues taken up during each 10 to 20 day egg production period, but not eliminating DDT residues already stored in the cerata. Field levels show an increasing whole body concentration with increasing age, probably dependent on feeding dosage, but difficult to determine without additional autecological knowledge of Hermisssenda.