Fig. 8. Hypertrophy of `first wave' somitic white fibres in Danube bleak (Cc) reared at rising temperatures and pearlfish (Rf) reared at constant temperatures. Size (cross-sectional area) means of defined numbers of largest fibres per epaxial quadrant (Cc, N=70; Rf, N=80) within developmental stages as defined in Table 1 (stage terminology and other explanations as in Fig. 7). Values are means ± 1 S.D.