Mean discrimination factors ± SD (‰) between experimental diet and tissues of arctic foxes.

Subscripts: Sample sizes are within parentheses. ΔC are obtained after lipid correction (see details in methods). A: adult; F: female; M: male; Y: yearling;*assuming that the delay since diet shift was long enough to exceed the turnover of both liver and muscle, following other estimates available from other mammals [5]. There was missing information for some individuals, which resulted in varying sample sizes in the different analyses or summary estimates.