Extended Data Table 3.

Annual fish metrics and mercury concentrations during the recovery phase

Footnote: Data presented are mean (± s.e.m.) of n fish measured and their muscle tissue analysed for ambient and lake spike MeHg concentrations (ng g⁻¹ w.w., measured as THg), except for northern pike and lake whitefish where concentration data were standardized by fish length (range in parentheses). Percent lake spike THg = [lake spike THg]_i/[ambient THg]_i × 100. Isotopic Hg additions were made to Lake 658 from 2001–2007; Lake 240 is a reference lake. Fish collections occurred each autumn.

*Year class failure.

†Standardized by fish length (pike: 475 mm; whitefish: 535 mm).