Table 2. Proportions of Dunlin diet from terrestrial and estuarine sources as calculated with the two-isotope and single-isotope mixing models. Year and capture site Sample size Mean δ13C value (‰) Mean δ15N value (‰) Terrestrial % of diet† 95% Confidence intervals† Terrestrial % of diet‡ Standard deviation‡ Minimum terrestrial % of diet‡ Maximum terrestrial % of diet‡ 2000-2001 BP shore 31 -15.32 12.32 0.28 0.17–0.40 0.30 2.38 0.01 0.69 1999-2000 BP shore 181 -16.30 11.85 0.36 0.26–0.46 0.37 0.23 0.06 0.95 1998-1999 BB shore 8 -19.02 12.56 0.59 0.42–0.77 0.54 0.20 0.28 0.89 1998-1999 BB field 25 -16.94 13.70 0.41 0.32–0.50 0.38 0.10 0.23 0.68 1998-1999 BP field 11 -18.05 11.78 0.51 0.42–0.60 0.50 0.16 0.10 0.78 1997-1998 BB field 12 -19.67§ 12.62 0.64 0.51–0.77 0.58 0.17 0.35 0.87 Average 1997-2000 268 -16.54 12.13 0.38 0.29–0.47 0.38 0.22 0.01 0.95 †Single-isotope (δ13C) model. ‡Dual-isotope model. §Significantly different (P < 0.05) from all other year-location groups.