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Bibliography Note: |
Includes bibliographical references (pages 10-11) 21 |
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Summary, Etc. Note: |
Abstract: Poisoning of North American waterfowl resulting from the ingestion of lead shot by ducks, geese, and swans causes an estimated annual mortality of 2% to 3% of the population. To alleviate this problem the search for a suitable substitute for lead has been underway since the early 1950's. Proposed substitutes for lead shot were evaluated in a series of acute toxicity tests with pen-reared mallards. Most candidate materials were as toxic to ducks as commercial lead shot. Coating or alloying lead with other materials only delayed mortality among dosed ducks. |
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Additional Physical Forms: |
Online version: Patuxent Wildlife Research Center. Toxicity of lead and proposed substitute shot to mallards. Washington : U.S. Dept. of the Interior, Fish and Wildlife Service, 1974 (OCoLC)608592906 |