Fig. 6.

Calculated expenditures scaling versus speed and lunge duration (dots) and trend lines (continuous and dashed). (A) Assessment of the ceteral term in Equation (9) for the 27 m blue whale, with f = 0 versus f = 1.45. (B) Body size assessment with f =1.45 for the three showcased in the Tables, with the continuous lines corresponding to data fits: E_1-lunge ∼2.43 ${\mathrm{U}}_{\text{open}}^{1.20}$ (27 m blue whale), ∼1.75 ${\mathrm{U}}_{\text{open}}^{1.03}$ (22 m blue), and ∼0.36 ${\mathrm{U}}_{\text{open}}^{0.70}$ (8 m humpback); and the dashed lines to: E_1-lunge ∼1.59 ${\mathrm{U}}_{\text{open}}^{1.40}$ (27 m blue), ∼1.12 ${\mathrm{U}}_{\text{open}}^{1,24}$ (22 m blue), and ∼0.20 ${\mathrm{U}}_{\text{open}}^{0.96}$ (8 m humpback; calculated with shape drag).