LFs compared for the six emission lines under study. Top panel: best Saunders fit to the observed (solid lines) and dust-corrected (dashed lines) line LFs, for the six studied emission lines, as indicated in the legend. Bottom panel: ratios between the observed and the intrinsic (dust-corrected) LF, for each emission line. In both panels the error bars are obtained from 50 jackknife realizations (Sect. 5.2).