J. R. Soc. Interface 13, 20160068. (Published online 23 March 2016) (doi:10.1098/rsif.2016.0068)
In figure 7, the data points in the graphs in the left column are mislabelled: the labels (indicating viscosity) are in reverse order in the original publication, with viscosity increasing from left to right. In the figure below, the labels indicate viscosity in the correct order, with values decreasing from left to right. The corrected figure is given in the next page:
Figure 7.
Comparison of swimming performance between the factual intermediate-regime morph (FM, green) and two counterfactual morphs (inertial-regime: IM, blue; viscous-regime: VM, orange). Each dot in the logarithmic plots (a(i)), (b(i)), (c(i)), (d(i)) represents the simulation of a swimming event. The deformations of the longitudinal axis of the fish models are the same for all events, but five different viscosities were applied per morph. Black curves in (a(i)), (b(i)), (c(i)), (d(i)) connect points with equal viscosity but changed morph. (a(i)) Resultant swimming speed U against resultant Reynolds number Re. (a(ii)) Swimming speed as percentage of that of FM against the applied viscosities. (b(i)) Power per unit muscle mass Pm against Re. (b(ii)) Power per unit muscle mass Pm of the different morphs as a percentage of that of FM against the applied viscosities. (c(i)) Cost of transport per unit muscle mass Cm = Pm/U against resultant Re. (c(ii)) Cm of the different morphs as a percentage of that of FM against the viscosities used in the simulations. (d(i)) Froude efficiency η = TU/P against Re. (d(ii)) Froude efficiency as a percentage of that of FM against the applied viscosities. Note that comparing morphs at a given Re implies a comparison at different water viscosities—the morphs have the same length but generate different swimming speeds, so viscosity must be different to keep Re the same across morphs.
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