“…Often, there is no information on whether the symbiont induces CI or any other phenotype in their hosts (Duplouy, Couchoux, et al, 2015). The stability properties of reported low frequencies are rarely evaluated, as most studies report prevalence of the symbiont at a single time point; recurrent screenings of the same natural populations over the course of several generations are rare (however, see Duplouy, Couchoux, et al, 2015;Duplouy, Nair, et al, 2021;Kriesner et al, 2013). Hence, the changes in the infection frequencies through generations remain unknown, and it is difficult to determine stability of the infection frequency, let alone any existence of invasion barriers or other dynamical features of the system.…”