Fig. 8

Model goodness of fit according to the assumed values for the energy cost of two immune responses against Haemonchus contortus. Parameters \({{{e}}}_{{{{I}}}_{{{E}}}}\) and \({{{e}}}_{{{{I}}}_{{{F}}}}\) refer to the energy cost of immunes responses against larvae establishment (\({I}_{E}\)) and fecundity (\({I}_{F}\)), respectively. The fitting criteria used for parameter estimation was the normalized residual sum of squares for each individual i (\({{{N}}{{R}}{{S}}{{S}}}_{{{i}}}\)). The average \(NRSS\) over the 42 individuals is represented. The global optimum is indicated with an asterisk