Table 1.
List of parameters.
| Symbol | Description (units) |
|---|---|
| δ | Background term |
| nI(t) | Number of infectious flocks |
| Sk(t) | Number of susceptible flocks in a district k at time t |
| βW | Transmission rate within the subdistrict ((flock)−1 (day)−1) |
| βB | Transmission rate from the neighbour subdistrict ((flock)−1 (day)−1) |
| pC | Power coefficient for chicken |
| pD | Power coefficient for ducks |
| ξ | Multiplier for relative infectiousness and transmissibility of ducks to chicken |
| rck | Fraction of area occupied by rice paddies |
| αR | Scaling coefficient for rice density |
| ϵR | Threshold for rice density |
| nR | Power coefficient for rice density |
| dk | Intensity of duck industry |
| αD | Scaling coefficient for intensity of duck farming |
| ϵD | Threshold for intensity of duck farming |
| nD | Power coefficient for intensity of duck farming |