Figure 3.

(a) Principle component analysis (PCA) and (c) ancestry coefficients for n = 238 black rats (Rattus rattus) collected in Haida Gwaii, BC. PCA was performed using the R‐package SNPRelate v1.16.0 (Zheng et al., 2012), and ancestry coefficients (k = 9) were estimated using sparse non‐negative matrix factorization implemented by the R‐package LEA v2.4.0 (Frichot & François, 2015). Three regionally distinct clusters were identified indicated by the coloured ovals on (a) and (b) and by coloured brackets on (c)