swifco_rs.carcasses module¶
The carcass of a dead individual is inaccessible to non-group mates with a certain probability within_core.
The default value of that parameter is based on a data-driven model calibration using spatial-temporal data of notified ASF cases in wild boar [Lange_2017].
Death of animals can occur either in the shared space between neighbouring groups (edges, probability 1 - within_core) or in the core area of the herd (probability within_core).
After death in the core area, the carcass is only accessible for the individuals associated with the respective cell. Otherwise, i.e. death in the shared area, the carcass is randomly assigned to one of the connecting edges of the habitat cell, so it is accessible for the individuals in the cell of origin as well as to the individuals of one neighbouring cell (8 possible neighbours).
- swifco_rs.carcasses.common_direction_and_seasonal_decay(durations=[12, 12, 10, 8, 6, 4, 4, 4, 6, 8, 10, 12], within_core=0.2)¶
Carcass decay with seasonal variations in speed of decay and common direction of deposition.
Carcass persistence is seasonal, with persistence times determined by the durations parameters.
To always reflect the current persistence, each carcass has a persistence score, which starts with 1.0 and is decreased by every step. The carcass is removed when the score reaches 0.0.
Parameters:
durations - duration of carcass presence in ticks for each month of the year (default value based on [Ray_2014])
within_core - probability of placing carcass in core of habitat cell
- swifco_rs.carcasses.fixed_decay(duration=4, within_core=0.05)¶
Simple carcass decay with fixed duration of carcass presence.
Parameters:
duration - duration of carcass presence in ticks
within_core - probability of placing carcass in core of habitat cell
- swifco_rs.carcasses.seasonal_decay(durations=[12, 12, 10, 8, 6, 4, 4, 4, 6, 8, 10, 12], within_core=0.05)¶
Carcass decay with seasonal variations in speed of decay.
Carcass persistence is seasonal, with persistence times determined by the durations parameters.
To always reflect the current persistence, each carcass has a persistence score, which starts with 1.0 and is decreased by every step. The carcass is removed when the score reaches 0.0.
Parameters:
durations - duration of carcass presence in ticks for each month of the year (default value based on [Ray_2014])
within_core - probability of placing carcass in core of habitat cell