Transcription of 12 genes determined with RT-qPCR in liver of adult Atlantic salmon kept at four different temperatures for 45 days. A) CuZn SOD, B) Mn SOD, C) CAT, D) GPx1, E) GR, F) HIF1A, G) CYP1A, H) IGFBP1A, I) MTOR, J) NDUFS1, K) HSP90B and L) PSMC2. Each value represents the mean ± SEM (n = 9). Significant differences were identified with 1-way ANOVA analysis. *P < 0.05, **P < 0.01, ***P < 0.001. ****P < 0.0001. MNE = Mean Normalized Expression.