Rest-frame equivalent width EW₀ of the Lyα line in four redshift bins. The dashed and dotted lines, respectively at EW₀ = 25 and 55 Å, represent the two thresholds that we apply in the analysis. The red and blue histogram indicate the bright sample (M_FUV<M^∗) and the faint (M^∗<M_FUV<M^∗ + 1) one, respectively. 80% of the galaxies in each panel have an EW₀(Lyα) below the value indicated by the arrow.