Figure 2

Relative fitness of mating strategies as expected survival of adults between cohorts increases and with helping dominant. The total numbers of offspring are summed across nests where females mate once or five times in populations at points when the frequency of the helping allele (A) first reaches 10 (darkest line), 25, 50, or 75% (lightest blue line) of the population. Values greater than one indicate that, on average, polygamous nests are more productive than monogamous nests. Each point represents the mean of 100 individual simulations. Offspring are produced in cohorts of one (A) or five (B).