thumbnail

Thickness of the American woodcock eggshell, 1971

Bulletin of Environmental Contamination and Toxicology

By:

Links

Abstract

Eggs or empty shells of the American woodcockwere collected from 10 states in 1971and shell thickness (mean of clutch means) was compared with that of eggs collected from 16 states during the years 1859-1939. The 1971 shells (n = 91) from hatched eggs or those containing fully developed embryos were about i0 percent thinner (P<0.001) than both unembryonated shells (n = 26) from the same year and the 1859-1939 shells (n = 169) from essentially unembryonated eggs. The difference is attributed to the transfer of calcium from the shells to the embryos and not to environmental pollutants.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Thickness of the American woodcock eggshell, 1971
Series title:
Bulletin of Environmental Contamination and Toxicology
Volume
9
Issue:
5
Year Published:
1973
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
281-286
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Bulletin of Environmental Contamination and Toxicology
First page:
281
Last page:
286