(full paper is archived in the Miller Library)
Title: Nitrogen exretory products in the limit Acmaea (Mollusca: Gastropoda: Prosobranchia)
Student Author(s): Baribault, William H.
Faculty Advisor(s): Phillips, John
Location: Final Papers Biology 175H
Date: June 1966
Abstract: Nitrogen excretory products were examined in the genus Acmaea by a microdiffusion technique for urea and ammonia and a colorimetric technique for uric acid. Five species were examined, varying in vertical distribution. Similar concentrations of ammonia, urea, and uric acid were found in all five species. A large amount of intraspecific variation in the distribution of these compounds was noted, especially in the high intertidal form Acmaea scabra and Acmaea digitalis. These variations might reflect individual differences in enzyme activity, individual differences in diet, or adaptive responses to the environment.
Notes: Published 1968, Veliger 11(Suppl): 109