Trends of differences between indices from full integrated light and from the fiber-aperture flux (i.e., the aperture bias) as a function of redshift, for the three morphological subsamples defined in Sect. 2.3. The points indicate the median trends and are colored according to the median fraction of flux in fiber as indicated by the color bar. The gray-shaded area displays the 16th − 84th percentile range, while the dashed horizontal line is the zero reference. The dynamic range of each index is given as a reference to evaluate the relevance of the aperture bias.