decreased mating efficiency decreased mating efficiency during stationary phase A biological process phenotype in which the observed mating efficiency, as determined by counting zygotes, asci, and sometimes spores, is lower than normal when the population in which the mating cells are found is in stationary phase. reduced mating efficiency during stationary phase 2018-01-23T14:00:34Z FYPO:0006331 Note that mating efficiency is often measured by counting zygotes plus asci, sometimes also including spores, so a change in measured mating efficiency may reflect a change in conjugation frequency (see FYPO:0000031 and its descendants), a change in sporulation (see FYPO:0000121 and its descendants), or both. For this reason, this term is not a child of 'mating phenotype' (FYPO:0000031). midori