Fig. 4. PGC-1β mRNA expressed as a proportion of PGC-1 + β transcript levels in red muscle (A), white muscle (B), heart (C) and liver (D) of goldfish exposed to three acclimation temperatures (4, 20, 35°C) and three dietary treatments (fasted, control and high fat diet). Bars represent means + s.e.m. Different letters indicate statistically significant differences between treatments according to a Kruskall–Wallis test followed by a Mann–Whitney U-test (N=7–17). Abbreviations as in Fig. 2.