Parameter

Description

Sample value

Range

$\Lambda$

recruitment rate of snail hosts

150 per year

100 - 200

$k_m$

recruitment rate of single male

145 per year

-

$k_f$

recruitment rate of single female

100 per year

-

${\mu }_m$

elimination rate of single male

0.1 per year

0.01 - 0.2

${\mu }_p$

elimination rate of single pair

0.02 per year

0.001 - 0.05

${\mu }_f$

elimination rate of single female

0.2 per year

0.1 - 0.5

${\mu }_s$

elimination rate of snail hosts

0.1 per year

0.01 - 0.2

${\alpha }_s$

disease-induced death rate of snail hosts

0.5 per year

0.1 - 0.9

$\beta$

transmission rate from pairs to susceptible snails

1.8 × 10⁻⁴ per year

10 × 10⁻⁴ - 25 × 10⁻⁴

$\rho$

the effective mating rate 0.467 per year

0.467 per year

0.1 - 0.5