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Implications of the Circumpolar Genetic Structure of Polar Bears for Their Conservation in a Rapidly Warming Arctic

Figure 3

Recent directional gene flow (ca. 3–10 generations) calculated on the basis of allelic frequencies (number of migrants, m) among polar bear clusters.

Data generated using the program bayesass [47], examining gene flow relationships between the four clusters of polar bears (Southern Canada (SC; red), Canadian Archipelago (CA; blue), Eastern Polar Basin (EP; yellow) and Western Polar Basin (WP; green)), identified by program structure analysis of microsatellite data. Arrow widths represent only directional gene flow values that are significantly different from zero (no migration) and from the value for migration in the opposite direction.

Figure 3

doi: https://doi.org/10.1371/journal.pone.0112021.g003