Tarragon (Artemisia dracunculus) Essential Oil at Optimized Dietary Levels Prompted Growth, Immunity, and Resistance to Enteric Red-Mouth Disease in the Rainbow Trout (Oncorhynchus mykiss)

Table 2

Growth parameters of rainbow trout (O. mykiss) over 60 days feeding with TGO.

Parameters	TG1	TG2	TG3	TG4
IW (g)	9.50 ± 1.11^a	11.71 ± 1.16^a	9.35 ± 1.40^a	11.67 ± 1.17^a
FW (g)	49.02 ± 1.53^b	53.88 ± 1.62^a	54.43 ± 1.49^a	52.75 ± 1.54^a
WG (g)	38.29 ± 0.42^b	42.16 ± 0.78^a	42.85 ± 0.53^a	43.08 ± 0.60^a
SGR (%/day)	2.11 ± 0.003^a	2.44 ± 0.04^a	2.31 ± 0.02^a	2.54 ± 0.03^a
FCR	1.12 ± 0.029^a	1.12 ± 0.016^b	1.14 ± 0.013^b	1.15 ± 0.014^b
SR (%)	100.00 ± 0.00^a	100.00 ± 0.00^a	100.00 ± 0.00^a	100.00 ± 0.00^a

Control or TG1 (untreated), TG2 (0.5% TGO), TG3 (1% TGO), TG4 (2% TGO). IW, initial weight; FW, final weight; WG, weight gain; SGR, specific growth rate; FCR, feed conversion ratio; and SR, survival rate. Data are represented as mean ± SE. Different letters (a and b) in the same row indicate significant differences ().