Fig. 10

The regression analyses based on the reduced major axis between the mineralized volume of the laryngeal cartilages or pulse peak frequency against skull size (cubed geometric mean). A log₁₀-transformed volume of the mineralized cricoid cartilage and log₁₀-transformed GM³; B log₁₀-transformed volume of the mineralized thyroid cartilage and log₁₀-transformed GM³; C log₁₀-transformed volume of the mineralized arytenoid cartilage and log₁₀-transformed GM³; D log₁₀-transformed volume of the mineralized tracheal chamber and log₁₀-transformed GM³; E log₁₀-transformed CF₂ peak frequency and log₁₀-transformed GM; F log₁₀-transformed CF₁ peak frequency and log₁₀-transformed GM³. CV: cricoid cartilage volume; TV: thyroid cartilage volume; AV: arytenoid cartilage volume; CHV: tracheal chambers volume; GM³: cubed geometric mean of the skull height (SH), skull length (SL), and skull width (SW). Note that plots for P0 individuals are not shown in D, E, and F, as mineralization and echolocation pulse are absent at this stage