The compensatory potential of increased immigration following intensive American mink population control is diluted by male-biased dispersal.

The areas identified as hotspots of productivity also received a disproportionately high number of identified immigrants, with 45 of 65 individuals from 19 litters where a source of dispersal was identified, and that were of dispersal age (>5 months) being captured here, and 57 % of dispersal movements (>4 km) ending in these areas, despite them only representing 40 % of the total waterways, a highly significant difference from null expectation (χ 2 = 11.1, df = 1, p < 0.001).

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