Table 2.

Summary of the model containing all fixed effects and significant interactions. Infection and its interaction with parasite stage (host activity only) were removed from this model because this information is also contained in selection line. Comparisons are with not-yet-infective (host activity only) parasites from the control line.

	host manipulation	host activity
random effects
factor	variance ± s.d.	variance ± s.d.
identity (intercept)		0.0060 ± 0.0775
replicate (intercept)	0.0002 ± 0.0127	0.0011 ± 0.0329
residual	0.0431 ± 0.2076	0.0216 ± 0.1470

factor	estimate ± s.e.	t	estimate ± s.e.	t
fixed effects
intercept	0.2354 ± 0.0185	12.697	0.2897 ± 0.0216	13.418
selection line (high)	0.0147 ± 0.0172	0.859	−0.0046 ± 0.0270	−0.170
selection line (low)	−0.0737 ± 0.0172	−4.275	0.0271 ± 0.0271	0.999
selection line (uninfected)	−0.2261 ± 0.0351	−6.448	0.2301 ± 0.0366	6.287
generation	0.0277 ± 0.0155	1.791	0.0011 ± 0.0124	0.086
parasite stage			0.2360 ± 0.0174	13.540
parasite stage: generation			0.0286 ± 0.0155	1.849
parasite stage: selection line (high)			0.0138 ± 0.0172	0.806
parasite stage: selection line (low)			−0.0742 ± 0.0173	−4.298
parasite stage: selection line (uninfected)			−0.2285 ± 0.0351	−6.516
infection: generation	−0.0646 ± 0.0168	−3.846	0.0209 ± 0.0135	1.545
parasite stage: generation: infection			−0.0655 ± 0.0168	−3.905