Infectious speciation revisited: impact of symbiont-depletion on female fitness and mating behavior of Drosophila paulistorum.

Under mild Tetracycline treatment (0.01% over five generations) however, the AM semispecies produces a highly significant sex bias towards males (ratio males to females = 1.79, χ 2 = 43.27; d.f. = 1; P <0.0001), whereas the OR semispecies did not deviate from the usual 1∶1 sex ratio ( Table 1 ).

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