Fig. 2. Mass and temperature dependence of salmonid metabolism in the Hengill system.

Effects of (a, b) temperature and (c, d) mass on the metabolic rate of brown trout following (a, c) acute exposure (SW Iceland__AC) and (b, d) chronic exposure (SW Iceland__CH) assays. Linear regressions: (a) ln(I_M)=-0.551 + 0.361 T_A, F_1,77 = 20.61, p < 0.001, r² = 0.201; (b) $\ln \left(I_M\right)=0.124$ + $0.054T_A$, F_1,73 = 0.075, p = 0.785, r² = −0.013; (c) $\ln \left(I_T\right)=-0.551$ + $0.628\ln M$, F_1,77 = 63.94, p < 0.001, r² = 0.447; (d) $\ln \left(I_T\right)=0.124$ + $0.591\ln M$, F_1,73 = 79.27, p < 0.001, r² = 0.514. Source data are provided as a source data file.