Fig. 5
Comparison of the relationships between \( \raisebox{1ex}{$\ \sigma $}\!\left/ \!\raisebox{-1ex}{${\lambda}^2$}\right. \) and \( \raisebox{1ex}{$L$}\!\left/ \!\raisebox{-1ex}{$\lambda $}\right. \) for each dataset of cuttlebone and cuttlefish (Lee and Demer 2014) obtained by combining 120 kHz data (Fig. 4) with 70 kHz data (Fig. 3), where σ p , σ b and σ c are scattering cross-sectional areas (m2) corresponding to the maximum TS (TS m ) and the mean TS (<TS b >) of cuttlebone, and the mean TS (<TS c >) of cuttlefish, respectively. L b and L c is the lengths (m) of cuttlebone and cuttlefish, respectively and λ is the acoustic wavelength (m). The TS-L relationships for cuttlebone and cuttlefish was converted from the relationships between \( \raisebox{1ex}{$\ \sigma $}\!\left/ \!\raisebox{-1ex}{${\lambda}^2$}\right. \) and \( \raisebox{1ex}{$L$}\!\left/ \!\raisebox{-1ex}{$\lambda $}\right. \), respectively