Stock-specific stable isotope values
Large interannual variations were observed for both
δ13C and δ15N (Figure 2). Stocks
that are in close geographic proximity showed similar patterns in SI
values variability at low frequency but their SI values can differ
substantially over small temporal scale. Suess effect-corrected
δ13C values showed more stability over time than
δ15N and also less variation between stocks with
values mainly distributed between -19 to -17.5‰ while
δ15N values spanned over 3‰ (8.5 to 11.5‰).