Fig. 5. Experiment 4. Direct comparison of the effect of the bilateral selective removal of the aesthetascs (AE) and the medial guard setae (lighter gray and hatched columns) vs the bilateral selective removal of only the medial guard setae (GS) (darker gray and cross-hatched columns) 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=7 experimental animals (Panulirus argus) in each experimental group over the 9 trials of an experimental 3-day bock; experimental days are numbered chronologically. Note that neither the selective removal of the AE (together with the medial GS) nor the selective removal of only the medial GS has any consistent, long-term effect on the mean wipe compared to the mean wipe rate measured in the unoperated animals in the initial 3-day block (Days 01–03). ANOVA shows no overall statistically significant difference between the columns in either experimental group (P=0.36 for AE+GS-ablated animals, P=0.80 for GS-ablated animals). Pair-wise comparisons by unpaired t-tests between the means of the respective 3-day blocks also reveal no significant differences between both treatments (P=0.81 for Days 08–10, P=0.74 for Days 13–15, P=0.88 for Days 20–22). Wipe rates of all 3-day blocks (means ± S.E.M.): Days 01–03, AE-ablation, 15.4±2.7; Days 01–03, GS-ablation, 19.6±3.1; Days 08–10, AE-ablation, 19.1±3.1; Days 08–10, GS-ablation, 17.9±3.3; Days 13–15, AE-ablation, 21.2±4.5; Days 13–15, GS-ablation, 19.2±3.4; Days 20–22, AE-ablation, 19.6±4.5; Days 20–22, GS-ablation, 20.5±3.3.