Figure 12.

Comparison of stimulus duty cycle and strain values that maximize power (‘optimized’; filled symbols, dotted lines) with values measured in vivo (open symbols, solid lines) at (a) 10°C and (b) 20°C. The difference was greatest at the anterior positions and at 10°C. In addition, at 10°C, increased swimming speed led to a greater difference between optimal and in vivo conditions (t-test on difference of means, p<0.001). Results from manual analysis of EMG duration (circles) are shown for all temperatures and speeds.