The conservation of Fennoscandian arctic foxes - Stockholms ...

Figure 9. Mean relative altitude of arctic and red fox faecal samples in winter and summer. Altitude estimatesfrom different mountain regions in Sweden were normalised to control for latitudinal differences among regions.Faeces from red foxes were found at the same altitude during winter and summer, whereas arctic fox faeces werefound at higher altitudes during summer than winter.Figure 10. Mean relative altitude of arctic fox faecal samples in winter and summer, divided between areaswhere red foxes are present and where they have been experimentally removed. Altitude estimates werenormalised as described in Figure 1. In areas where red foxes have been removed, arctic foxes stayed at the samealtitude between seasons.13