Fig. 3. Effect of distilled-water treatment of antennular flagellar chemosensory neurons on search responses to a concentration series of artificial crab odor. The ordinate represents the ratio between the post-ablation and pre-ablation responses. A value of one indicates no effect of ablation treatment, and a value of zero indicates complete elimination of responses after ablation. Each column shows the upper and lower quartiles with the median (solid line) and the mean (dotted line). N=7 lobsters in each group. Distilled-water treatment of all antennular flagella significantly reduced search responses (shaded columns) [one-way within-subjects ANOVA with multiple dependent measures (MANOVA), P=0.02]. Sham control lobsters (open columns) were not affected (MANOVA, P=0.62). For further details, see Materials and methods.