The \bar{\Lambda} / \Lambda and \bar{\Lambda} / K^0_\mathrm{S} production ratios are measured by the LHCb detector from 0.3\,\mathrm{nb}^{-1} of pp collisions delivered by the LHC at \sqrt{s} = 0.9\,TeV and 1.8\,\mathrm{nb}^{-1} at \sqrt{s} = 7\,TeV. Both ratios are presented as a function of transverse momentum, p_\mathrm{T}, and rapidity, y, in the ranges {0.15 \u3c p_\mathrm{T} \u3c 2.50\,\mathrm{GeV}/c} and {2.0
