Morphometric variation of populations of House mice Mus demesticus in Britain and Faroe



A multivariate analysis was made of the mandible shape of wild-caught House mice from the British mainland, various circum-British islands and Faroe.

Shape variation within any one of the three archipelagoes—Faroe, Shetland, Orkney—is greater than within mainland Britain excluding Caithness. This is probably due to the founder effect, as well as reduced subsequent swamping.

The grouping of Caithness mice with those of Orkney, Shetland and Faroe may reflect their Scandinavian origin.