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Fig. 1. The effect of 5 min exercise on cardiac output at –1°C (A),
4°C (B) and 8°C (C) in Pagothenia borchgrevinki acclimated to
–1°C and 4°C for 4–5 weeks. There was a significant
increase in cardiac output at all temperatures for both acclimation groups.
Values are means ± s.e.m. (N=8). *Significant
difference in cardiac output from resting levels (time=0 min) for
–1°C acclimated fish;
significant difference in
cardiac output from resting levels (time=0 min) for 4°C acclimated
fish.