Figure 5.

Response of 7–9 months or older adult zebrafish in a novel tank. The mean difference between the first 2 (0–2) and the last 2-min (8–10) when tanks are bottom lit or top lit 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 in bottom lit condition. The mean difference between the first 2 and the last 2-min when tanks are top lit are shown in Gardner-Altman estimation plots. The latency to make the (E) first entry, (F) second entry, to the top half of the tank, the frequency of (G) such transitions and (H) of the erratic swimming episodes. 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.