Extended Data Fig. 4: Observed and simulated site frequency spectra for the northern elephant seal.
From: Genomic and fitness consequences of a near-extinction event in the northern elephant seal

The blue bars represent the empirical site frequency spectrum (SFS) based on RAD sequencing data from 96 individuals and the grey bars represent the mean SFS across 100 simulations based on the maximum likelihood parameter estimates from the best-supported model. The error bars represent the standard deviations around the means of the simulated values. The first bar on the left represents the number of monomorphic sites and the second bar represents the number of singletons, both of which were excluded from the demographic analysis as described in the Methods.