3.1. Experiment 1
The behavioral responses during the acclimation period differed significantly among the groups (F 15,92 = 2.88,P = 0.0010) (Table 1). However, a post hoc test revealed that the behavioral responses in each group did not differ from those in the Sal group. The behavioral responses during the experimental period differed significantly among the groups (F 15,92 = 3.07,P = 0.0005) (Fig. 2). A post hoc test revealed that both the Nal and Alo groups showed increased freezing (Nal: P = 0.0076, Alo:P < 0.0001) and decreased walking (Nal: P = 0.016, Alo: P = 0.013) and investigation (Nal: P = 0.0067, Alo: P = 0.0005) as compared to the Sal group.