Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Concentrations of DDT sublethal and lethal to Calanus helgolandicus (Claus), and effects of sublethal concentrations on respiratory rates
Student Author(s): Hunter, A. Decker
Pages: 15
Location: Final Papers Biology 175H
Date: June 1969
Keywords: DDT
Abstract: Marine copepods (Calanus helgolandicus) were classified as visibly unaffected, visibly affected, or dead after varying periods of incubation in varying concentrations of DDT. At twenty-four hours, 50% were affected (visibly affected + dead) by a predicted 60ppb; at 48 hours, 50% were affected by a predicted 5.8ppb. It was found that1 ppb DDT increased the rate of respiration over that of the controls.