Figure 3. Explaining sex ratio variation throughout infections.

Sex ratios (arcsin square-root transformed) of P. chabaudi correlate with the density of: a, red blood cells; b, parasites; and c, gametocytes. Lines are fitted from the estimates predicted by the minimal model using infection parameters observed 48 h before sex ratios (see Supplementary Information). Genotypes are grouped according to the four different sex ratio patterns followed throughout 30 independent infections (Fig. 2).