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Waterfowl Mortality in the Coeur D'alene River Valley, Idaho
Norman R. Chupp and Paul D. Dalke
The Journal of Wildlife Management
Vol. 28, No. 4 (Oct., 1964), pp. 692-702
Stable URL: http://www.jstor.org/stable/3798784
Page Count: 11
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Waterfowl mortality in the Coeur d'Alene River Valley has aroused public concern since the early 1900's. An investigation and evaluation of the valley as waterfowl habitat was begun in 1954. Information from this and subsequent studies leaves little doubt that contamination of the Coeur d'Alene River Valley by mine wastes from the Coeur d'Alene mining area is the prime cause of the bird losses. Analyses of numerous soil, plant, and waterfowl specimens collected in the valley showed abnormally high concentrations of lead, zinc, and copper. The toxic effects of the assimilated mine wastes, coupled with environmental stress in the winter and early spring, are apparently sufficient to produce the mortalities noted. Management considerations associated with alleviating the problem of bird losses in the Coeur d'Alene River Valley are discussed briefly.
The Journal of Wildlife Management © 1964 Wiley