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Figure 1


Fig. 1. Spontaneous heart rate (fH) of 5°C, and 21°C, normoxia- and anoxia-acclimated control preparations during the control experiments. Adrenaline concentration (nmol l–1) is indicated in parentheses. Significant differences (P<0.05) in fH among time points within an experimental group are indicated by different letters. Values are means ± s.e.m.; N=6 except for the 5°C normoxia-acclimated experimental group where N=5, unless otherwise indicated in parentheses.