Influence of host nutritional condition on post-infection traits in the association between the manipulative acanthocephalan Pomphorhynchus laevis and the amphipod Gammarus pulex

Table 1 Effect of parasite population, food treatment and host size on the infection intensity

Source of variation	d.f.	LR-χ2	P
Parasite population	1	52.48	<0.0001
Food treatment	1	1.22	0.27
Gammarids size	1	0.02	0.89
Parasite population x Food treatment	1	8.06	0.004

Whole model: χ₂ = 57.86, d.f. = 4, P <0.0001
Generalized linear model analysing the effect of parasite population, food treatment and gammarid size on the infection intensity (number of parasites harboured by gammarid hosts). A quasi-Poisson error term and a log link-function were used. The model presented here minimized the AIC criterion

ISSN: 1756-3305