. 2021 Jun 9;11:12140. doi: 10.1038/s41598-021-91730-1

Table 1.

Marginal mean estimates of δ¹³C and δ¹⁵N from linear mixed effects models, standard ellipse area corrected for sample size (SEAc), fish size (mm total length), and number of fish analyzed (n) from fishes captured in the San Juan River and Lake Powell, Utah.

Habitat/Species	δ¹³C (mean, SE)	δ¹⁵N (mean, SE)	Total length (mean ± SD)	SEAc	n
River upstream
Channel Catfish (Ictalurus punctatus)	− 23.3 (1.0)^a	11.8 (0.4)^a	304 ± 123	3.69	27
Colorado Pikeminnow (Ptychocheilus lucius)*	− 22.5 (1.1)^a	14.4 (0.4)^b	295 ± 74	11.36	14
Common Carp (Cyprinus carpio)	− 23.9 (1.4)^a	7.9 (0.6)^c	567 ± 64	2.24	5
Flannelmouth Sucker (Catostomus latipinnis)*	− 21.7 (1.2)^a	10.4 (0.5)^d	251 ± 161	8.68	14
Razorback Sucker (Xyrauchen texanus)*	− 21.3 (1.3)^a	11.3 (0.5)^ad	408 ± 83	7.96	8
River downstream
Channel Catfish (I. punctatus)	− 24.1 (0.9)^a	12.7 (0.5)^ac	251 ± 177	10.62	32
Colorado Pikeminnow (P. lucius)	− 23.7 (1.0)^a	13.8 (0.6)^a	413 ± 95	5.11	15
Common Carp (C. carpio)	− 24.4 (1.0)^a	10.0 (0.6)^b	422 ± 217	13.77	22
Flannelmouth Sucker (C. latipinnis)*	− 23.1 (1.0)^a	11.2 (0.6)^bc	365 ± 76	5.40	16
Gizzard Shad (Dorosoma cepedianum)	− 26.1 (1.3)^ab	11.5 (1.0)^abc	354 ± 161	4.29	4
Razorback Sucker (X. texanus)*	− 26.4 (1.0)^b	12.7 (0.6)^ac	511 ± 53	6.46	19
Reservoir
Channel Catfish (I. punctatus)	− 28.5 (0.3)^a	14.0 (0.2)^a	320 ± 74	8.47	45
Common Carp (C. carpio)	− 30.5 (0.3)^b	12.5 (0.2)^b	489 ± 51	9.52	47
Flannelmouth Sucker (C. latipinnis)*	− 25.0 (0.7)^c	11.6 (0.4)^b	417 ± 54	12.94	11
Gizzard Shad (Dorosoma cepedianum)	− 24.8 (0.3)^c	12.1 (0.2)^b	450 ± 48	6.69	59
Razorback Sucker (X. texanus)*	− 26.0 (0.4)^c	12.1 (0.3)^b	481 ± 60	7.39	24

Native species are denoted with an*. Within habitats, species sharing letters did not differ (Tukey’s HSD: P > 0.05) in mean isotope values.