Initially, the O deme maintained a population of 6324 until 8018.2671 generations ago. From 8018.2671 to 709.2, its size changed exponentially to population size 4043. A exponential reduction ensued, culminating in 2513 individuals by 570.209. Starting from 570.209 generations ago, the population has changed from 2513 to 6451, at a linear rate.
time_units: generations
demes:
  - name: O
    start_time: .inf
    epochs:
      - start_size: 6324
        end_time: 8018.2671
      - start_size: 6324
        end_size: 4043
        end_time: 709.2
        size_function: exponential
      - start_size: 4043
        end_time: 570.209
        end_size: 2513
        size_function: exponential
      - end_time: 0
        start_size: 2513
        end_size: 6451
        size_function: linear