Star formation rates in simulations #1 and #28−30 are plotted. In a), SFR of galaxy 1nb with different gas fractions in the disc are plotted, evolving in vacuum. In b), SFRs of the same three model galaxies undergoing ram-pressure stripping are displayed. As expected, a lower gas mass fraction in the disc implies a lower star formation rate. In the ram-pressure stripping case, the star formation is enhanced in all cases, but with increasing gas mass fraction, the effect is less pronounced.