Elimination of endrin by mallard ducks

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Endrin is very toxic to birds and has been implicated in the deaths of birds in nature. However, it is not known how rapidly birds eliminate endrin, a factor important in determining how much is accumulated in tissues. In this study, the loss rate of endrin was followed for 64 days in mallard (Anas platyrhynchos) drakes that had been fed 20 ppm endrin for 13 days. The loss from carcass and blood was described by the equation Y = a e b square root of x where Y = the concentration of endrin in ppm, a = the concentration at day 0, e = the base of natural logarithms, b = the first order rate constant for the elimination process, and x = the number of days after cessation of endrin treatment. Endrin was lost rapidly at first; concentrations in carcasses on a wet-weight basis decreased by 50% in the first 3 days. Thereafter, endrin was eliminated more slowly; elimination of 50% of the remainder required 8.9 days, and it took 32.9 days to lose 90% of the original amount.
Publication type Article
Publication Subtype Journal Article
Title Elimination of endrin by mallard ducks
Series title Toxicology
DOI 10.1016/0300-483X(79)90065-9
Volume 12
Issue 3
Year Published 1979
Language English
Contributing office(s) Patuxent Wildlife Research Center
Description 189-196
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Toxicology
First page 189
Last page 196
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