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Human Disturbances to Waterfowl

Annotated Bibliography

118. Laperle, M. 1974. Effects of water level fluctuation on duck breeding success. Pages 18-30 in H. Boyd, ed. Canadian Wildlife Service waterfowl studies in eastern Canada, 1969-73. Report Series No. 29. Canadian Wildlife Service.

Searching effort was reduced from 1968 to 1970, which meant a reduction of interference by observers, but the American black duck's (Anas rubripes) nesting success fell from 64% in 1968 to 53% in 1969 and 44% in 1970. There was no such trend for the mallard (Anas platyrhynchos) with nesting successes of 36%, 73%, and 61% for the same years. The low in 1968 was attributed to the intensive effort made that year to capture mallard hens on nests.

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