Up until 7826.7344 generations ago, the population of Z deme was constant at 8561. It then entered a exponential phase of change until 7821.444 generations, reaching size 9437. This was succeeded by an linear phase of change, leading to 4747 by 3837.0. From 3837.0 generations to present, the population has changed from 4747 to 1237 exponentially.
time_units: generations
demes:
  - name: Z
    start_time: .inf
    epochs:
      - start_size: 8561
        end_time: 7826.7344
      - start_size: 8561
        end_size: 9437
        end_time: 7821.444
        size_function: exponential
      - start_size: 9437
        end_time: 3837.0
        end_size: 4747
        size_function: linear
      - end_time: 0
        start_size: 4747
        end_size: 1237
        size_function: exponential