Ratio of surviving to initial GCs within the central region of galaxies delimited by the scale radius r_s of halos as a function of the mass ratio M_halo/M_GC and for different FDM particle masses m₂₂. The survival criterion corresponds to a final apocentre larger than 0.1 r_s. The left panel shows an in situ population ($r_{\mathrm{apo}}^{\mathrm{init}}<r_s$) initially composed of about N₀ = 300 GCs, while the right panel corresponds to an ex situ population ($3r_s<r_{\mathrm{apo}}^{\mathrm{init}}<10r_s$) initially composed of about N₀ = 2100 GCs.