Factors influencing mercury concentrations in walleyes in northern Wisconsin lakes
Transactions of the American Fisheries Society
By: J.G. Wiener, R.E. Martini, T.B. Sheffy, and G.E. Glass
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Abstract
The authors examined relations between mercury concentrations in walleyes Stizostedion vitreum and the characteristics of clear-water Wisconsin lakes, which spanned a broad range of pH values (5.0-8.1) and acid- neutralizing capacities (-9 to 1,017 mu eq/L). Total concentrations of mercury in axial muscle tissue of walleyes (total length, 25-56 cm) varied from 0.12 to 1.74 mu g/g wet weight. Concentrations were greatest in fish from the eight lakes with pH less than 7.0; concentrations in these fish equaled or exceeded 0.5 mu g/g in 88% of the samples analyzed and 1.0 mu g/g in 44%. In the five lakes with pH of 7.0 and above, concentrations exceeded 0.5 mu g/g in only 1 of 21 walleyes. Multiple regression revealed that lake pH and total length of fish accounted for 69% of the variation in mercury concentration in walleyes. Regression models with total length and either waterborne calcium or acid-neutralizing capacity as independent variables accounted for 67% of the variation in concentration.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Factors influencing mercury concentrations in walleyes in northern Wisconsin lakes |
| Series title | Transactions of the American Fisheries Society |
| Volume | 119 |
| Issue | 5 |
| Year Published | 1990 |
| Language | English |
| Publisher | U.S. Fish and Wildlife Service |
| Contributing office(s) | Upper Midwest Environmental Sciences Center |
| Description | pp. 862-870 |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Transactions of the American Fisheries Society |
| First page | 862 |
| Last page | 870 |
| Google Analytic Metrics | Metrics page |