Figure 2.

Host fitness (≈ parasite virulence) in the four host‐parasite combinations. All factors are shown as fitted effects relative to controls: survival is an acceleration factor (the ratio of expected time‐until‐death); the probability of reproduction is a relative risk; growth, rate of offspring production, and LRS are ratios. Bars represent the 95% profile likelihood CIs (survival) or bootstrapped CIs (all others). A. parthenogenetica infected after exposure to 10 ,000 E. artemiae spores are indicated with open circles. Asterisks indicate significant differences from controls (represented by the dotted gray line).

The plotted survival effect for A. parthenogenetica excludes the aberrant group (see Results). All reproductive and fitness traits were obtained for females only. The probability of reproduction is not shown for A. parthenogenetica because it could not be analyzed. Weighing the contributions of nauplii and cysts to the rate of offspring production and LRS generated qualitatively equivalent results; the results shown here are for equal weights.