Fig. 13. The relationship between the density (number mm^–3 muscle) of (A) total myonuclei and (B) Pax 7 immunoreactive cells in tissue sections in relation to fork length for the DB morph (open circles), the LB morph (filled circles), the PL morph (open triangles) and the PI morph (filled triangles). Linear regressions were fitted to the data that had the following equations: density myonuclei= 54029.4–425.8FL (r²=0.45; F_1,26=21.2; P<0.0001). Density Pax7^+ve cells=1653.5–10.54FL (r²=0.17; F_1,26= 5.44; P<0.05).