Fig. 9. Citrate synthase (CS) activity in GH-transgenic and non-transgenic salmon liver. Sample size equals 8 or more for each group. Results are means ± s.e.m. Two-way ANOVA was used, assessing the effect of age (P<0.001), presence of the transgene (P<0.001) and the interaction of age and the transgene (P<0.001). Pearson correlations between mass and liver CS equal 0.905, P<0.001 (Bonferroni). Different letters indicate significant differences.