The microbiota knows: handling-stress and diet transform the microbial landscape in the gut content of rainbow trout in RAS

Table 1 Initial (mean ± SD, n_A = 216, n_B = 192) and final body weights of individual rainbow trout (mean ± SD, n_A = 120, n_B = 120) and performance parameters (SGR, FCR, DFI, PER, and PRE) based on group weights from day 50 in relation to experimental groups (mean ± SD, n = 3)

Line	Treatment	IBW	FBW	SGR	FCR	DFI	PER	PRE
A	0-V	124.91 ± 0.23	347.80 ± 38.25	1.76 ± 0.03	0.88 ± 0.01	1.54 ± 0.00^B	2.73 ± 0.04	44.32 ± 0.92
	1-V	124.71 ± 0.25	343.01 ± 45.00	1.73 ± 0.06	0.89 ± 0.03	1.54 ± 0.01^B	2.69 ± 0.10	43.99 ± 5.98
	0-F	124.52 ± 0.66	359.82 ± 34.10	1.78 ± 0.02	0.85 ± 0.01	1.51 ± 0.01^A	2.77 ± 0.02	45.79 ± 0.10
	1-F	124.62 ± 0.22	350.09 ± 40.50	1.72 ± 0.03	0.87 ± 0.01	1.49 ± 0.01^A	2.70 ± 0.03	41.49 ± 3.48
B	0-V	146.90 ± 0.41	433.00 ± 58.23	1.74 ± 0.04	0.89 ± 0.02	1.54 ± 0.03^B	2.71 ± 0.07	41.19 ± 0.42
	1-V	147.75 ± 0.76	421.73 ± 69.35	1.76 ± 0.07	0.87 ± 0.03	1.53 ± 0.01^B	2.76 ± 0.10	39.40 ± 6.48
	0-F	147.15 ± 0.41	410.63 ± 43.93	1.75 ± 0.05	0.85 ± 0.02	1.49 ± 0.01^A	2.75 ± 0.07	45.48 ± 0.90
	1-F	147.15 ± 0.51	415.29 ± 56.39	1.78 ± 0.02	0.85 ± 0.01	1.51 ± 0.00^A	2.77 ± 0.04	44.55 ± 0.91

IBW initial body weight (g), FBW final body weight (g), SGR specific growth rate, FCR feed conversion ratio, DFI daily feed intake, PER protein efficiency ratio, PRE protein retention efficiency. For the formula, see the supplementary file. Values in the same column with different superscript letters within each genetic trout line are significantly different (p < 0.05). Unstressed group (0), stressed group (1), fishmeal diet (F), plant-based diet (V).

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