Fig. 8. Pyruvate kinase (PK) activity in GH-transgenic and non-transgenic salmon white muscle. Sample size equals 8 or more for each group. Results are means ± s.e.m. PK data were r² transformed to obtain normality. 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=0.019). Pearson correlations between mass and white muscle PK equal 0.906, P<0.001 (Bonferroni). Different letters indicate significant differences.