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Eggshell thinning and residues in mallards on year after DDE exposure

Archives of Environmental Contamination and Toxicology

By:
and

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Abstract

A group of 16 mallard hens (Anas platyrhynchos), that had been given feed containing 40 ppm ofp,p'-DDE for 96 days, laid eggs with shells averaging about 15%?20% thinner than those of ten control birds during and up to 42 days after treatment. In eight of the treated birds killed at that time, whole-body DDE residues averaged 33.1 ppm (wet weight). The other eight treated birds and ten controls were kept through the winter with no additional DDE exposure and penned separately five days for individual egg collection about three weeks after laying began in spring. At that time (nearly 11 months after DDE feeding had stopped), the treated birds laid eggs with shells averaging 7.4% thinner than control eggshells (significant at P<0.05) and their whole-body DDE residues averaged 9.6 ppm (wet weight). Variations in eggshell thickness and DDE residues were considerable among treated birds. However, regression analysis showed moderate negative correlations (r=?0.51 to ?0.62) between eggshell thickness and DDE residues in whole bodies and eggs, and strong positive correlations (r=0.73 and 0.91) between DDE residues in whole bodies and in eggs.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Eggshell thinning and residues in mallards on year after DDE exposure
Series title:
Archives of Environmental Contamination and Toxicology
Volume
2
Issue:
4
Year Published:
1974
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
356-363
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Archives of Environmental Contamination and Toxicology
First page:
356
Last page:
363