Table 1: Sample sizes and stable isotope ratios (mean + confidence interval) of fish species, algae, and plankton collected in Jordanelle Reservoir, Utah, USA.

Species n δ13C δ15N
brown trout (large, > 400 mm) 12 -28.14 + 0.97 14.47 + 0.44
brown trout (small, < 400 mm) 8 -28.56 + 0.54 13.05 + 0.65
rainbow trout (large, > 400 mm) 3 -30.84 + 0.75 15.69 + 0.62
rainbow trout (small, < 400 mm) 23 -29.15 + 0.55 13.59 + 0.17
Utah chub (large, > 200 mm) 28 -31.16 + 0.48 12.25 + 0.30
Utah chub (small, < 200 mm) 1 -25.24 10.76
Utah Sucker 9 -27.92 + 0.90 11.54 + 0.27
smallmouth bass (large, > 200 mm) 26 -28.01 + 0.27 14.58 + 0.23
smallmouth bass (small, < 200 mm) 14 -27.93 + 0.48 13.60 + 0.45
yellow perch (large, > 100 mm) 13 -27.89 + 0.41 13.32 + 0.48
yellow perch (small, < 100 mm) 15 -29.19 + 0.23 12.85 + 0.32
algae 4 -26.99 + 0.30 6.09 + 1.00
plankton 5 -32.19 + 0.59 6.79 + 0.85