Figure 3.
Fitted logistic regressions of transmission fidelity (β) and male-killing benefit (sMK, proportion female offspring in a family—0.5) as functions of maternal Wolbachia density. Also shown is 2(β×sMK) as an indicator of the fitness of an infected cytoplasmic lineage relative to that of an infected lineage with perfect male killing and transmission. A normal distribution has been fitted to the observed frequency distribution (vertical bars) of Wolbachia densities measured in wild-caught females of D. innubila.