Table 1.
parameter | units | definition | ‘baseline’ value | −15% | +15% |
---|---|---|---|---|---|
a(t) | day−1 | birth-pulse function | — | — | — |
atotal | yr−1 | total annual per capita birth rate | 5 | 4.25 | 5.75 |
Bmean | — | mean birth date | 5 May | 1 January | 2 July |
Bwidth | day | birth-pulse width | variable | ||
Bstart | — | start of the parturition period | Bmean − Bwidth/2 | ||
Bend | — | end of the parturition period | Bmean + Bwidth/2 | ||
d | animal−1 d−1 | density-dependant mortality rate | 3.51 × 10−4 | 2.98 × 10−4 | 4.03 × 10−4 |
σ | d−1 | latency rate | 0.045 | 0.038 | 0.052 |
α | d−1 | disease-induced mortality rate | 0.08 | 0.068 | 0.092 |
ϕ | d−1 | emigration rate for susceptible and exposed individuals | 0.025 | 0.021 | 0.029 |
ψ | d−1 | emigration rate for infected individuals | 0.025 | 0.021 | 0.029 |
β | animal−1 d−1 | transmission rate | 0.04 | 0.034 | 0.046 |
kij | — | fraction of emigrants from j that move to i |