Density plots of realized isotopic niche widths (SEAB ‰2) of the three secondary consumer fish species ((A) C. plumbeus [n = 35], (B) R. cataractae [n = 65], and (C) Catostomus spp. [n = 33]) compared where F. virilis are present vs. absent. Black dots represent the bootstrapped mean SEAB areas. Blue crosses represent the small sample size corrected standard ellipse area (SEAc). Boxes around means indicate the 95%, 75%, and 50% probability intervals of the SEAB area. Lower case letters indicate significant differences between mean SEAB values where different letters indicate significant differences with 95% confidence and like letters indicate statistically similar mean SEAB values. Unique reach codes appear below their respective bar.