Initially, the Y deme maintained a population of 8776 until 8676.0 generations ago. From 8676.0 to 3879.8724, its size decreased linearly to population size 1474. A linear increase ensued, culminating in 4740 individuals by 607.998. Starting from 607.998 generations ago, the population has decreased from 4740 to 2770, at a exponential rate.
time_units: generations
demes:
  - name: Y
    start_time: .inf
    epochs:
      - start_size: 8776
        end_time: 8676.0
      - start_size: 8776
        end_size: 1474
        end_time: 3879.8724
        size_function: linear
      - start_size: 1474
        end_time: 607.998
        end_size: 4740
        size_function: linear
      - end_time: 0
        start_size: 4740
        end_size: 2770
        size_function: exponential