. 2014 Sep 16;9(9):e107523. doi: 10.1371/journal.pone.0107523

Table 2. Biological indices, nitrogen isotope ratios (δ¹⁵N) of muscle tissue and trophic discrimination values for juvenile rainbow trout (Oncorhynchus mykiss) fed four experimental diets formulated to contain similar protein and lipid levels.

	Experimental Treatments
	0PBM	33PBM	67PBM	100PBM
*Biological indices*
Final weight (g)	21.8±1.5^ab	21.9±1.1^ab	23.5±1.6^a	20.9±0.5^b
TGC¹	1.48±0.05	1.48±0.01	1.54±0.05	1.47±0.02
Weight gain (% of initial)	1480±39	1495±32	1587±32	1495±103
PER²	2.85±0.1	2.72±0.3	2.78±0.2	2.77±0.1
*Isotope ratio of muscle at equilibrium with the diet*
δ¹⁵N (‰)	14.7±0.9^a	10.1±0.1^b	7.1±0.1^c	4.1±0.0^d
*Isotopic trophic discrimination*
Δδ¹⁵N (‰)	2.0±0.1^a	1.1±0.1^b	1.0±0.1^b	−0.1±0.0^d

Fishmeal and fish oil were incrementally substituted for poultry by-product meal (PBM; 0, 33, 67 and 100%) and poultry oil. Measurements were made after 80 d. Values within the same row with different superscripts letters were significantly different (P<0.05).¹ Inline graphic [43] ² .

Table 2. Biological indices, nitrogen isotope ratios (δ15N) of muscle tissue and trophic discrimination values for juvenile rainbow trout (Oncorhynchus mykiss) fed four experimental diets formulated to contain similar protein and lipid levels.

Table 2. Biological indices, nitrogen isotope ratios (δ¹⁵N) of muscle tissue and trophic discrimination values for juvenile rainbow trout (Oncorhynchus mykiss) fed four experimental diets formulated to contain similar protein and lipid levels.