Figure 2.

(a) Change of total oxygen consumption, (b) heart rate and (c) pseudo cardiac output (expressed in arbitrary units AU) with increasing temperatures for three spiny lobster species - cold-temperate J. edwardsii (blue), subtropical S. verreauxi (green) and tropical P. ornatus (red). Data presented as means ±95% CI, n = 6–8. Open circles indicate significant difference relative to the lowest temperature for each species. Percentage values indicate relative change between starting and final temperature. Coloured tick marks at bottom x-axes indicate optimal temperatures for growth corresponding to each species (20.6 °C for J. edwardsii¹⁰⁰, 21.5 °C for S. verreauxi³⁴ and 28 °C for P. ornatus⁸²).