Fig. 8. The mobility test with cucumber juice. The average (± s.e.m.) time to reach the cucumber juice is shown as columns: ST, the superior tentacle-amputated group; IT, the inferior tentacle-amputated group. The numbers in or above the columns indicate the number of slugs used for that test. (A) Times taken in the lit environment (see Fig. 1). A significant difference was observed only in the pre-conditioning IT amputation group between the paired and unpaired-conditioned slugs. ^*P<0.05 by Student's t-test. (B) Times taken under a shading box (Fig. 6). (C) Average time taken by slugs that underwent different surgical treatments to reach the cucumber juice in the lit or shaded environments. ^**P<0.01, ^*P<0.05 by Student's t-test. (D) The avoidance rates in the mobility tests with cucumber juice (>3 min). ^**P<0.01 by ² test.