Figure 8.

EMG duty cycle as a function of tail-beat frequency (swimming speed) at 10°C (red filled circles) and 20°C (black filled circles). Note that there is no difference in duty cycle at 10 and 20°C, but that as swimming speed increases, EMG duty cycle declines. Note also that the swimming speed scale differs slightly from that in figure 7, as this scale was calculated for this particular fish. For comparison purposes, the stimulation duty cycles that we found produced optimal power output in the isolated muscle experiments are shown with dotted lines (red, 10°C; black, 20°C). Adapted from Rome & Swank (1992).