Thickness of the American woodcock eggshell, 1971

J.F. Kreitzer

doi:10.1007/bf01684784

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Thickness of the American woodcock eggshell, 1971

J.F. Kreitzer

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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.

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Bulletin of Environmental Contamination and Toxicology Article

Source-reported bounding extent: 25.799891182088334° to 49.38237278700955° latitude; -106.435546875° to -66.873779296875° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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J.F. Kreitzer. 1973. Thickness of the American woodcock eggshell, 1971. https://doi.org/10.1007/bf01684784

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