S/N of the total [O II] flux as a function of the global effective radius divided by the MUSE PSF FWHM for the parent sample of galaxies located in the main sequence of star-forming galaxies. The white area corresponds to the parameter space used for the strict selection (S/N > 40 and R_eff/FWHM > 0.5), whereas the light gray area also contains galaxies within the relaxed selection (S/N > 30 and R_eff/FWHM > 0.25) used in Sect. 4 to study the impact of the selection on the analysis. The dotted black line corresponds to the limit for a constant S/N of 8 over the effective radius. The symbols correspond to the visual velocity field flags from 1 to 8. Crosses and empty symbols correspond to galaxies with no obvious velocity shear, whereas filled symbols correspond to galaxies with evidence for rotation. The color indicates the ratio of the bulge luminosity with respect to the disk one inside the global effective radius, red and blue colors corresponding, respectively, to bulge- and disk-dominated galaxies. The two problematic AGN hosts rejected in the final sample are identified with stars.