These models, or "population viability analyses," assess the risk of extinction over time based on computational iterations that play out how a herd may expand and contract (with births and deaths) and genetically evolve given the interplay of the number, age and sex of animals in the herd; reproductive traits; influx of new genetics vs. inbreeding; management actions (culling/hunting); and potential effects of random events such as disease, drought and fire.
Source: tatoeba (12363552)