Up to 9034.91 generations ago, the population of the U deme was steady at 5875. It then entered a phase of exponential decrease until 6978.0 generations and size 555. Following this, there was a exponential change to 9588 individuals, lasting until 6252.6. Since 6252.6 generations ago, the population has changed from 9588 to 7267 at a linear pace.
time_units: generations
demes:
  - name: U
    start_time: .inf
    epochs:
      - start_size: 5875
        end_time: 9034.91
      - start_size: 5875
        end_size: 555
        end_time: 6978.0
        size_function: exponential
      - start_size: 555
        end_time: 6252.6
        end_size: 9588
        size_function: exponential
      - end_time: 0
        start_size: 9588
        end_size: 7267
        size_function: linear