Total length (mm), fresh mass (mg) and dry matter ratio (%) of the 5-day old anadromous sea-migratory whitefish (A), freshwater whitefish (B) and freshwater vendace (C) larvae in different sulfate (SO₄^2–) concentrations and in control treatments (RW = R. Kokemäenjoki water, LW = L. Konnevesi water) with background SO₄^2–concentration. The significance levels are above the bars (one-way Anova for length and mass, Kruskall-Wallis for dry matter): − = P > 0.05, * = P < 0.05, ** = P < 0.01. Vertical lines on bars represent standard error.