[CII]/FIR, [OI] 145 μm/FIR, [OIII]/FIR, [OI] 63 μm/FIR, [OI] 63 μm/[CII] and [OIII] 88/[OI] 63 μm versus the continuum 60/100 μm ratio. M 82 values are shown as gray scale. Symbols are the following (Graciá Carpio et al. 2011, and in prep.): big symbols: SHINING/PACS observations; filled symbols: the lines are detected; open symbols: one or both lines are not detected; blue points: HII galaxies; green points: LINER galaxies; black symbols: AGNs; circles: Seyfert 2 galaxies; triangles: Seyfert 1 galaxies; diamonds: QSOs; magenta points: high-z galaxies; grey points: unclassified galaxies; small magenta points: flux at 25 or at 100 μm is an upper limit. (This figure is available in color in the electronic form.)