DDT and PCB levels in Lake Coeur d'Alene, Idaho, osprey eggs

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Since 1969, we have investigated certain aspects of the ecology of nesting populations of ospreys (Pandion haliaetus) in northern Idaho and northeastern Washington. We have censused populations, determined reproductive success and banded nestlings to study migration and survival. These populations are reproducing successfully; the number of nesting pairs has steadily increased during the past two decades. The threats to nesting success remain of interest however, and, we have attempted to evaluate them. The levels of DDT residues and PCB found in fresh eggs of the Coeur d'Alene population are reported here. Some of the factors which influence exposure of this population to pesticide contamination are also described.

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Reference Code: A75JOH01IDUS

Full Citation: Johnson, D. R., W. E. Melquist, and G. J. Schroeder. 1975. DDT and PCB levels in Lake Coeur d'Alene, Idaho, osprey eggs. Bulletin of Environmental Contamination and Toxicology 13(4): 401-405.

Location: ANIMAL EF: BIRDS