Colour moult phenology and camouflage mismatch in polymorphic populations of Arctic foxes ...

• Main Authors: Zimova, Marketa, Moberg, Dick
• Format: Dataset
• Language: English
• Published: Dryad 2022
• Subjects: FOS Biological sciences; Arctic
• Online Access: https://dx.doi.org/10.5061/dryad.djh9w0w3n; https://datadryad.org/stash/dataset/doi:10.5061/dryad.djh9w0w3n

Species that seasonally moult from brown to white to match snowy backgrounds become conspicuous and experience increased predation risk as snow cover duration declines. Long-term adaptation to camouflage mismatch in a changing climate might occur through phenotypic plasticity in colour moult phenology and or evolutionary shifts in moult rate or timing. Also, adaptation may include evolutionary shifts towards winter brown phenotypes that forgo the winter white moult. Most studies of these processes have occurred in winter white populations, with little attention to polymorphic populations with sympatric winter brown and winter white morphs. Here, we used remote camera traps to record moult phenology and mismatch in two polymorphic populations of Arctic foxes in Sweden over 2 years. We found that the colder, more northern population moulted earlier in the fall and later in the spring. Next, foxes moulted earlier in the fall and later in the spring during colder and snowier years. Finally, white foxes ...