Fig. 3. Experiment 2. Effect of the bilateral selective removal of the aesthetascs (AE) and the medial guard setae (GS) on the mean wipe rate of the antennules after stimulation with 3 ml of 0.5 mmol l^–1 L-glutamate. Wipe rate values are means ± S.E.M. of N=8 experimental animals (Panulirus argus) over the 9 trials of an experimental 3-day block; experimental days are numbered chronologically. Note that selective removal of the aesthetascs (together with the medial GS) does not cause a decrease in the mean wipe rate (Days 06–08) compared to the mean wipe rate measured in the unoperated animals in the initial 3-day block (Days 01–03). Note further that the mean wipe in the re-test blocks following after longer time intervals (Days 15–17, Days 22–24) is substantially higher than in the first two 3-day blocks of the experiment. ANOVA shows an overall statistically significant difference between the columns (P=0.002). Pair-wise comparisons by Newman–Keuls post tests between the means of the 3-day blocks reveal no significant difference between the pre-AE-ablation (Days 01–03) and the post-AE-ablation (Days 06–08) blocks (P>0.05), whereas the retest blocks following after longer time periods differ significantly from the post-AE-ablation block (P<0.01 for Days 15–17, P<0.05 for Days 22–24). The two retest blocks do not differ significantly from each other (P>0.05). Wipe rates of all 3-day blocks (means ± S.E.M.): Days 01–03, 10.0±1.2; Days 06–08, 11.4±1.5; Days 15–17, 20.7±3.9; Days 22–24, 18.4±1.9.