Velocity shear v _shear (blue circles) and velocity dispersion σ (green squares) as a function of stellar mass. The plot shows clearly how more massive galaxies show a stronger velocity shear than less massive ones, particularly the ones above ~10 ¹⁰ M _☉. The same trend, albeit weaker, exists for velocity dispersion σ. Dashed line shows a power-law fit to our data, while the solid line is the Tully–Fisher relation at z ~ 0 according to Bell & de Jong (2001). The dot-dashed line shows the Tully–Fisher relation at z ~ 2 according to Cresci et al. (2009).