Results from linear mixed models on the effects of habitat (coastal or inland), age of animal (adult or juvenile) and tissue (fur, muscle and collagen) on δ¹³C and δ¹⁵N in Icelandic arctic foxes.

<p>Results from linear mixed models on the effects of habitat (coastal or inland), age of animal (adult or juvenile) and tissue (fur, muscle and collagen) on δ¹³C and δ¹⁵N in Icelandic arctic foxes.</p

Average δ¹³C and δ¹⁵N values of potential prey available in coastal and inland habitats in Iceland.

1<p>) Data from interior Alaska <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032071#pone.0032071-Dalerum3" target="_blank">[56]</a>.</p><p>The prey table is not comprehensive and data are not intended for quantitative analyses, but rather to exemplify the wider isotope niche width that is available in coastal habitats.</p

Pedigree and life history data

Pedigree and life history dat

Results from linear mixed models on the effects of habitat (coastal or inland) and age of animal (adult or juvenile) on three attributes of individual variation in δ¹³C and δ¹⁵N.

<p>Within individual isotope niche breadth was estimated as the Euclidean distance between collagen and muscle within individuals, between individual variation in individual isotope niche breadth was calculated as the Euclidean distance of each individual difference between muscle and collagen to group centroids in a 2 dimensional isotope space, and an individual specialization index that relates intra individual variation to the total isotope niche breadth of each sample group, calculated as the ratio of the average Euclidean distances of muscle and collagen samples to within individual centroids and the average Euclidean distances to group centroids. Groups were in all cases defined as age classes within each habitat.</p

Isotope niche breadth of adult and juvenile foxes from coastal (open symbols) and inland (closed symbols) habitats on Iceland.

<p>Isotope niche breadth was estimated as the Euclidian distances to group centroids in a 2 dimensional isotope space formed by δ¹³C and δ¹³N. Figure presents mean ± 1 SE.</p

Results from a linear mixed model on the effects of habitat (coastal or inland), age of animal (adult or juvenile) and tissue (fur, muscle and collagen) on the Euclidean distance to group centroids in a 2 dimensional isotope space formed by respective δ¹³C and δ¹⁵N values in Icelandic arctic foxes.

<p>These distances can be interpreted as a measure of population wide isotope niche breadth.</p

Biplots of δ¹³C and δ¹³N values of fur (A, B), muscle (C, D) and collagen (E, F) samples from adult and juvenile arctic foxes from coastal (open symbols) and inland (closed symbols) habitats on Iceland.

<p>Biplots of δ¹³C and δ¹³N values of fur (A, B), muscle (C, D) and collagen (E, F) samples from adult and juvenile arctic foxes from coastal (open symbols) and inland (closed symbols) habitats on Iceland.</p

Dataset from Genetic rescue in an inbred Arctic fox (<i>Vulpes lagopus</i>) population

Genetic and life history dat

R-code from Genetic rescue in an inbred Arctic fox (<i>Vulpes lagopus</i>) population

Code for all analyses performed in

Supplementary figures and tables from Genetic rescue in an inbred Arctic fox (<i>Vulpes lagopus</i>) population

Caption for each figure and table can be found in the documen