Toxicity of Lead and Proposed Substitute Shot to Mallards (Classic Reprint) - Hardcover

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Excerpt from Toxicity of Lead and Proposed Substitute Shot to Mallards<br/><br/>Mortality was not significantly different among lead-dosed adult or first year hen and drake pen  reared mallards; lead-dosed adult, wild mallards of both sexes; and lead  dosed adult, male black ducks (anas rubripes). The ingestion of one lead shot, size 4, by each of 80 pen  reared mallards caused an average 19% mortality.

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