Figure 4. Effects of enriched environment for 21 (EE 21) or 28 days (EE 28) on antioxidant mechanisms in zebrafish brain submitted to unpredictable chronic stress (S+) or no (S−). Non-protein thiols (NPSH) and Total thiol (SH) levels.

BARREN: barren tank. Data are expressed as a mean + S.E.M. n = 5. Two-way ANOVA/Tukey.