Deme M had an initial size of 1807 until 1291.49 generations ago. At that time, its population size changed to 8593, and has remained there till current time.
time_units: generations
demes:
  - name: M
    start_time: .inf
    epochs:
      - start_size: 1807
        end_time: 1291.49
      - start_size: 8593
        end_time: 0