Fig. 15. The influence of rearing temperature on the number and average diameter of fast muscle fibres post-hatch. (A) Log₁₀(fast fibre number per myotomal cross-section) in fry of the dwarf benthic (circles), large benthic (triangles) and pelagic (diamonds) morphs reared at `cool ambient temperatures' of 2.2–3.2°C (open symbols) or in heated water of 4–7°C (closed symbols). A linear regression was fitted to the data with the following equation: log₁₀(fibre number=2.98+0.19F (r²=0.71; F_1,51=125.1; P<0.0001). (B) The average fibre diameter vs fork length. Symbols as for A.