Figure 7.

Average activity of individual crayfish for each of the 3 experimental weeks. (A) Crayfish 1–8 in the cell proliferation study; (B) Crayfish 1–6 in the cell survival study. Animals tend to exhibit increased activity in the first week after placement in the aquaria, which we attribute to their exploration of the novel environment. Their activity then decreases to a relatively constant level, which is maintained at over the next 2 weeks. Activity levels in weeks two and three were relatively consistent for individual crayfish, but varied between crayfish.