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Science. 1968 Oct 11;162(3850):271-3.

Chlorinated hydrocarbons and eggshell changes in raptorial and fish-eating birds.

Abstract

Catastrophic declines of three raptorial species in the United States have been accompanied by decreases in eggshell thickness that began in 1947, have amounted to 19 percent or more, and were identical to phenomena reported in Britain. In 1967, shell thickness in herring gull eggs from five states decreased with increases in chlorinated hydrocarbon residues.

PMID:
4877438
[PubMed - indexed for MEDLINE]
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