Salty divides: geometric morphometrics reveal Danish straits as barriers to otter migration

被引:1
作者
Galatius, Anders [1 ]
Christiansen, Cecilie Deleuran [2 ]
Elmeros, Morten [3 ]
Lorenzen, Eline D. [4 ]
机构
[1] Aarhus Univ, Dept Biosci, Marine Mammal Res, Frederiksborgvej 399, DK-4000 Roskilde, Denmark
[2] Univ Copenhagen, Nat Hist Museum, Univ Pk 15, DK-2100 Copenhagen, Denmark
[3] Aarhus Univ, Dept Biosci, Fauna Ecol, Grenaavej 14, DK-8410 Ronde, Denmark
[4] Univ Copenhagen, Globe Inst, Oster Voldgade 5-7, DK-1350 Copenhagen, Denmark
关键词
Population structure; Mustelidae; Management; Relict populations; LUTRA-LUTRA; EURASIAN OTTER; DIVERSITY; REGION;
D O I
10.1007/s42991-021-00171-w
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
The Eurasian otter (Lutra lutra) suffered a dramatic population decline in southern Scandinavia in the twentieth century and was subsequently presumed extinct in the Danish archipelago. However, in the 1990s, evidence of a relict population on the island of Zealand was reported. The vulnerability of this small population may be exacerbated by seawater barriers preventing migration to and from the island. To assess whether the Danish Straits have and will present a barrier to future otter migration, we used geometric morphometrics to investigate population structuring and assess the level of differentiation of otters across southern Scandinavia. Utilizing museum collections, we analysed 137 otter skulls from Zealand, Jutland, and southern Sweden. Statistical analyses showed highly significant shape differences between all three localities, likely reflecting migration between the three areas has historically been low. High jack-knife reclassification success rates support divergence among the areas, and directionalities of the vectors describing regional shape differences indicate that differences do not reflect isolation-by-distance.
引用
收藏
页码:1109 / 1114
页数:6
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