Fig. 6
Boxplots showing the acceleration of Chinese mitten crabs (n = 6) according to circadian phase, in the non-tidal a, transition b and tidal zone c and d. The plots of the tidal zone are split up according to tidal phase. Number of observations per circadian phase and tidal class is indicated on top of each boxplot. The transition zone is under microtidal influence, while the tidal zone is under meso- to macrotidal influence