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Functional forms for the per capita birth rates of susceptible (bS) and infected (bI) hosts and for the parasite-induced mortality rate (α) under each of the different combinations of resource and IP costs.
| constitutive cost | facultative cost | |
|---|---|---|
| mortality IP | bS(c) = b − h(c) | bS(c) = b |
| bI(c) = b−h(c) | bI(c) = b − h(c) | |
| α = γɛ + f(ɛ, c) | α = γɛ + f(ɛ, c) | |
| fecundity IP | bS(c) = b − h(c) | bS(c) = b |
| bI(c) = b − h(c) − g(ε, c) | bI(c) = b − h(c) − g(ε, c) | |
| α = γɛ | α = γɛ |
