Fig. 9. (A) Arterial oxygen delivery (Ta_O2) and (B) oxygen extraction (A_O2) of resting (x) and swimming () sockeye salmon during an acute temperature increase of 2°C h^–1. All values are means ± s.e.m. Different letters indicate significant differences between temperatures within a group, whereas an asterisk indicates a significant difference between resting and swimming fish at a given temperature.