Strong sexual selection fails to protect against inbreeding-driven extinction in a moth

Jonathan Parrett, Veroncia Ghobert, Fenn Cullen & Robert Knell
Sexual selection is predicted to influence population persistence because skew in male reproductive success may facilitate the purging of mutation load. We manipulated the strength of sexual selection in populations of Indian meal moths, Plodia interpunctella, by biasing adult sex ratios to be either male- or female-biased, leading to strong and weak sexual selection in males, respectively. After between 19 and 22 generations of experimental evolution we examined whether mutation load differed between these populations...
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