Online Resource 2. Parameter estimates and coefficient of determination for Lesage et al. (2010) and Ehrich et al. (2011) models fit to liver and muscle for each species and narwhal skin.

Dataset / Model / Slope / Intercept / r2
Liver
Pinnipeds
Bearded seal / 4 / -0.09 ± 0.06 / -0.12 ± 1.20 / 0.15
5 / 0.72 ± 0.13 / -1.62 ± 0.65 / 0.65
Harbour seal / 4 / -0.10 ± 0.04 / -1.02 ± 0.73 / 0.46
5 / 0.60 ± 0.57 / 1.51 ± 2.37 / 0.11
Harp seal / 4 / -0.23 ± 0.28 / -22.32 ± 5.52 / 0.79
5 / 0.91 ± 0.47 / -2.4 ± 2.10 / 0.43
Ringed seal / 4 / -0.14 ± 0.06 / -1.75 ± 1.26 / 0.10
5 / 1.53 ± 0.18 / -5.37 ± 0.76 / 0.62
Walrus / 4 / -0.23 ± 0.11 / -3.50 ± 2.20 / 0.21
5 / -0.03 ± 0.23 / 1.39 ± 1.14 / <0.01
Cetaceans
Beluga / 4 / -0.47 ± 0.10 / -8.36 ± 2.02 / 0.44
5 / 1.18 ± 0.13 / -4.04 ± 0.56 / 0.74
Narwhal / 4 / -0.15 ± 0.10 / -2.27 ± 1.91 / 0.44
5 / 1.16 ± 1.72 / -4.00 ± 6.83 / 0.13
Muscle
Pinnipeds
Bearded seal / 4 / -0.08 ± 0.02 / -1.60 ± 0.41 / 0.39
5 / 0.28 ± 0.55 / -1.07 ± 1.83 / 0.01
Harbour seal / 4 / -0.05 ± 0.04 / -0.98 ± 0.67 / 0.20
5 / 0.33 ± 0.72 / -1.13 ± 2.47 / 0.02
Harp seal / 4 / -0.45 ± 0.77 / -7.84 ± 5.00 / 0.35
5 / 0.55 ± 0.27 / -2.35 ± 0.97 / 0.45
Ringed seal / 4 / -0.27 ± 0.08 / -5.07 ± 1.51 / 0.16
5 / 1.46 ± 0.34 / -5.08 ± 1.17 / 0.25
Walrus / 4 / -0.08 ± 0.04 / -1.36 ± 0.84 / 0.17
5 / 0.96 ± 0.45 / -3.13 ± 1.56 / 0.21
Cetaceans
Beluga / 4 / -0.52 ± 0.11 / -9.51 ± 2.07 / 0.44
5 / 1.57 ± 0.42 / -5.30 ± 1.47 / 0.34
Bowhead / 4 / 0.32 ± 0.06 / 5.89 ± 1.28 / 0.83
5 / 0.59 ± 0.20 / -2.06 ± 0.84 / 0.64
Narwhal / 4 / -0.45 ± 0.12 / -2.91 ± 2.10 / 0.29
5 / 1.38 ± 0.23 / -4.72 ± 0.82 / 0.48
Skin
Narwhal / 4 / 0.38 ± 0.11 / -10.32 ± 0.48 / 0.48
5 / 0.62 ± 0.09 / -1.72 ± 0.39 / 0.54