Feather Type | Puffin 2007/08 | Puffin 2014/15 | Razorbill 2007/08 | Razorbill 2014/15 | |||
---|---|---|---|---|---|---|---|
Body | Cheek | Body | Cheek | Body | Body | Cheek | |
δ13C: Median & (σ) | −15.87 (0.38) | −15.65 (0.33) | −16.81 (0.72) | −16.46 (0.27) | − 16.47 (0.71) | −16.48 (0.68) | − 16.77 (0.31) |
δ15N: Median & (σ) | 12.58 (2.94) | 14.52 (1.95) | 15.15 (0.58) | 16.43 (0.09) | 16.44 (1.40) | 17.79 (0.46) | 15.76 (0.65) |
Δ13Cf-j: Cal. offset & (σ) | −0.02 (0.71) | 0.57 (0.95) | −0.60 (1.03) | −0.21 (0.99) | 0.65 (1.45) | 1.11 (0.86) | −0.07 (1.13) |
Δ15Nf-j: Cal. offset & (σ) | 1.74 (2.99) | 4.29 (2.19) | 4.63 (0.92) | 6.02 (0.99) | 6.13 (2.00) | 6.30 (1.73) | 4.78 (1.22) |