Figure 3.

Behaviors of rats in light/dark transition test in the long-term (30 days) after 2-week predator stress. Wistar rats that received early-life predator stress showed significantly more number of transitions compared with control Wistar rats (a), while there were no obvious differences in latency (c), total time spent in the light box (d), and total distance between stimulated and control groups (b)–(d). Each bar indicates a group defined according to strains (Wistar rats and WKY rats) and predator exposure (red bar: Wistar rats; white bar: WKY rats; unshadowed bar: control group; shadowed bar: predator exposure). Values are shown as mean ± SEM. The results of t-test are shown. *P < 0.05 for the effects of predator stress.