Metabolic variables (mean ± S. E.) in lake sturgeon <i>Acipenser fulvescens</i> representing three different test groups: control (100% O_2sat; 12L∶12D); treatment A (30% O_2sat; 12L∶12D); and treatment B (100% O_2sat; 24L).

Sample size (n) is 8–12 for each test group. Different superscript letters indicate significant differences (P<0.05) between test groups. SMR is the standard metabolic rate. MMRF30.5 and MMRS are the forced and spontaneous maximum metabolic rates, respectively. Measurements of MMRF30.9 are body mass adjusted to a 30.5 g fish. Body mass adjustments of MMRS to a 30.5 g fish (i.e. equivalent to MMRF30.5) change MMRS values by <1% and have no impact on the conclusions.