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The average proportion of the polygamous sex that is infected for polygynous (black) and polyandrous (grey) mating systems. The difference in epidemic size between the two mating systems peaks at intermediate values of α (degree of polygamy) and γ (probability of sterilization) (parameters: Nm = Nf = 500; β = 0.1; κ = 10−4; μ = 0.01; ρ = 0.5; σ = 0.05).
