J. Anim Sci.
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J. Anim Sci. 1976. 42:196-200.
© 1976 American Society of Animal Science
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DDT Analog Depletion Patterns in Steers1

Woodrow L. Martin2,3,, R. W. Rogers4, H. W. Essig4 and W. A. Pund5

Mississippi State University, Mississippi State 39762

Abstract

This study involved monitoring the depletion of DDT, DDD and DDE in the fat of eight steers (U.S.D.A. Good and Choice) that had been fed gin trash, for 216 days, contaminated with DDT and DDE. Perianal adipose tissue was obtained from each steer when they were changed to finishing diets that were not contaminated with DDT. Subsequent adipose tissue was obtained every 14 days for 56 days while steers were fed the finishing diets. The mean initial total DDT (DDT + DDD + DDE) level for the eight steers was 10.14 ppm (range 7.92 to 13.32 ppm) on a rendered fat basis. After 14, 28, 42 and 56 days the mean total DDT levels were 8.16, 6.41, 5.53 and 5.54 ppm, respectively. The additional reduction after 28 days was not significant (P>.05), whereas the 14- and 28-day values were (P<.01) different from each other and from the initial level. The addition of .5% choline chloride or .9 kg activated charcoal per head daily to the feed, singly or in combination, during the 56-day finishing phase did not (P>.05) influence DDT depletion.

Footnotes

1 Mississippi Agricultural and Forestry Experiment Station Journal Article No. 3052.

2 Data taken from a dissertation submitted in partial fulfillment of the requirements for a Ph.D. degree at Mississippi State University.

3 Mississippi Department of Agriculture.

4 Department of Animal Science.

5 Delta Branch Experiment Station.






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Copyright © 1976 by the American Society of Animal Science.