Insecticides: effects on cutthroat trout of repeated exposure to DDT

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Cutthroat trout were periodically exposed to p, pp-DDT, in acetone solution or in the food. Excessive mortality occurred only in lots treated with high concentrations of DDT, probably as a result of decreased resistance to nonspecific stressors. Surviving fish in these lots were significantly larger than those in the control lot, or in the lots treated with low concentrations of DDT. The number and volume of eggs produced was not reduced by DDT, but mortality among sac fry appeared to be highest in the lots treated with high concentrations. The data suggest that the sublethal concentrations of DDT ordinarily encountered in the environment are unlikely to damage a fishery.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Insecticides: effects on cutthroat trout of repeated exposure to DDT
Series title Science
DOI 10.1126/science.142.3594.958
Volume 142
Issue 3594
Year Published 1963
Language English
Publisher American Association for the Advancement of Science
Contributing office(s) Columbia Environmental Research Center
Description 4 p.
First page 958
Last page 961
Online Only (Y/N) N
Additional Online Files (Y/N) N
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