Fig. 6. Data for loss of equilibrium (i.e. C4; see Table 1) for Mirocaris fortunata (open triangles, filled triangles, from Figs 4 and 5, respectively) are compared to those for Rimicaris exoculata (solid diamonds, broken line), another vent shrimp studied previously (Ravaux et al., 2003). The latter data are the result of experiments using 15 individuals, which are here multiplied by 1.33 (20/15) to allow comparison with experiments (20 individuals).