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Science 21 November 1975:
Vol. 190. no. 4216, pp. 806 - 808
DOI: 10.1126/science.1239078
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Articles

Science, Vol 190, Issue 4216, 806-808
Copyright © 1975 by American Association for the Advancement of Science

articles

Brown pelicans: improved reproduction off the southern California coast

DW Anderson, JR Jehl Jr, RW Risebrough, LA Woods Jr, LR Deweese, and WG Edgecomb

Although still about 30 percent too low for population stability, productivity of California brown pelicans at their two northern colonies has improved significantly since 1971. Numbers of adults breeding probably reflect food supplies and recruitment from more successful colonies to the south, but improving fledging rates (up to 0.9 young per nest in 1974) reflect better egg survival and improving eggshell condition, with declining DDE contamination in anchovies, their major food source.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Ingestion of Petroleum by Seabirds Can Serve as a Monitor of Water Quality.
P. D. BOERSMA (1986)
Science 231, 373-376
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DDT-induced feminization of gull embryos.
D. Fry and C. Toone (1981)
Science 213, 922-924
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DDT contamination at Wheeler National Wildlife Refuge.
T. O'Shea, W. Fleming, and E Cromartie (1980)
Science 209, 509-560
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Productivity of ospreys in Connecticut--Long Island increases as DDE residues decline.
P. Spitzer, R. Risebrough, W Walker 2nd, R Hernandez, A Poole, D Puleston, and I. Nisbet (1978)
Science 202, 333-335
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