Fig. 10. The rate of muscle fibre hypertrophy of fast muscle fibres between successive sample points plotted against seawater growth in Atlantic salmon from the heated (filled circles) and ambient (open circles) treatment groups. The rate of hypertrophy has been plotted at the midpoint of the time period over which it was calculated. Values represent the mean of the difference between the observed fibre diameter and the mean value of the fibre diameter in the preceding sample.