Figure 2.

Response of 3–5 months old adult zebrafish in top lit novel tank.The first set of experiments examined the response of 3–5 months old fish in top lit tanks. The mean difference between the first 2 (0–2) and the last 2-min (8–10) of 10 min are shown in Gardner-Altman estimation plots. The latency to make the (A) first entry, (B) second entry, to the top half of the tank, the frequency of (C) such transitions and (D) of the erratic swimming episodes. The (E) total percentage of time, (F) average velocity (in mm/s), (G) average distance traversed (in mm) in the bottom third of the tank. (H) Percentage of time of the total spent swimming along the edge (thigmotaxis). Each dot in the group represents the response of one individual. N = 20 per group. Groups are plotted on the left axis, while the mean difference between the groups is depicted as a black dot and is plotted on a floating axis on the right. Ends of the bar around the mean shows 95% confidence interval. The shaded region in gray is 5,000 bootstrap sampling distribution.