Figure 4

Estimates of the migration (M and θ) (A) and skyline plots among three geographic regions of crayfish (B). Θ represents the mutation-scaled population size, and the value M in (A) indicates the mutation-scaled migration rate. Θ1, θ2, θ3 represents the population sizes of Huai River, lower reaches and UM regions of Yangtze River basin, respectively. The map in (A) was generated by ArcGIS 10.2.