The J deme had a size of 723 until 8661.5 generations ago. From 8661.5 generations to time 7899.152, its size changed exponentially to 2943 individuals. After that, until 5957.0, the population had a exponential growth to 3315 individuals. It then changed from 3315 to 9489, starting 5957.0 generations ago, until current times, at a linear rate.
time_units: generations
demes:
  - name: J
    start_time: .inf
    epochs:
      - start_size: 723
        end_time: 8661.5
      - start_size: 723
        end_size: 2943
        end_time: 7899.152
        size_function: exponential
      - start_size: 2943
        end_time: 5957.0
        end_size: 3315
        size_function: exponential
      - end_time: 0
        start_size: 3315
        end_size: 9489
        size_function: linear