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Environmental pollutants and eggshell thickness : anhingas and wading birds in the Eastern United States

Author: Harry M Ohlendorf; Erwin E Klaas; T Earl Kaiser
Publisher: Washington : U.S. Dept. of the Interior, Fish and Wildlife Service, 1979.
Series: United States.; Fish and Wildlife Service.; Special scientific report--wildlife
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Database:WorldCat
Summary:
In 1972 and 1973 we collected 1,339 clutches of eggs of anhingas (Anhinga anhinga) and 17 species of waders (herons, egrets, bitterns, ibises, and storks). We analyzed the eggs for organochlorine residues and compared shell thickness of these eggs and others collected since 1946 (and now in museum collections) with shell thickness of eggs collected before the widespread use of organochlorine pesticides. Eggshells  Read more...
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Additional Physical Format: Online version:
Ohlendorf, Harry M.
Environmental pollutants and eggshell thickness.
Washington : U.S. Dept. of the Interior, Fish and Wildlife Service, 1979
(OCoLC)956334058
Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Harry M Ohlendorf; Erwin E Klaas; T Earl Kaiser
OCLC Number: 4776811
Description: 94 p. : ill. ; 26 cm.
Contents: Abstract. Methods. Organochlorine Residues. Eggshell Thickness. Discussion and Conclusions. Acknowledgements. References. Appendixes 1 through 5.
Series Title: United States.; Fish and Wildlife Service.; Special scientific report--wildlife
Responsibility: by Harry M. Ohlendorf, Erwin E. Klaas, T. Earl Kaiser.

Abstract:

In 1972 and 1973 we collected 1,339 clutches of eggs of anhingas (Anhinga anhinga) and 17 species of waders (herons, egrets, bitterns, ibises, and storks). We analyzed the eggs for organochlorine residues and compared shell thickness of these eggs and others collected since 1946 (and now in museum collections) with shell thickness of eggs collected before the widespread use of organochlorine pesticides. Eggshells were significantly thinner in one or more regions for the post-1946 samples of anhinga, great blue heron, black-crowned night heron, and wood stork. We detected no significant change in the other species.

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