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Mercury in Fish and Waterfowl from Ball Lake, Ontario¹

ABSTRACT

A total of 323 fish samples representing 8 species and 26 waterfowl samples of 3 species were collected from the Ball Lake area of the Wabigoon-English River systems in northwestern Ontario and analyzed for total mercury levels by the flameless atomic absorption method. The average total mercury concentrations of walleye and pike were 3.24 and 5.55 mg/kg (wet Weight), respectively. The highest total mercury concentrations found during this study were 19.71 and 16.09 mg/kg (wet weight), respectively, in the muscle tissue of a walleye and pike. Frequency distributions of the total mercury concentrations in the fish are presented by species and sampling location. The highest average mercury levels in the breast muscle and liver tissue of three species of waterfowl were 8.36 and 98.56 mg/kg (wet weight), respectively.

Key Words: paper and pulp • chloralkali • health hazard

¹ Michigan State University Agricultural Experiment Station Paper No. 6682.

² Graduate Research Assistant, Associate Professor, Graduate Research Assistant, and Associate Professor, respectively, Institute of Water Research and Department of Fisheries and Wildlife, Mich. State Univ., East Lansing, MI 48824.

Received for publication June 20, 1974.