Algal and Vegetable Oils as Sustainable Fish Oil Substitutes in Rainbow Trout Diets: An Approach to Reduce Contaminant Exposure

Table 4

Effects of fish oil replacement with soybean oil, canola oil, and a blend of canola and Schizochytrium sp. biomass on fillet composition (g/kg DM) and fatty acid profile (% of total fatty acids) after growth period.

	18 FO	18 SO	18 CO	18 COS	25 FO	25 SO	25 CO	25 COS	Pooled SEM
Fatty acid
14 : 0	4.2^a	0.0^c	0.0^c	2.2^a,b	3.7^a	0.5^b,c	0.5^b,c	2.2^a,b	0.3
16 : 0	16.5^b,c,d	16.3^c,d	13.0^e	14.9^d	18.3^a,b	19.0^a	16.6^b,c	17.2^a,b,c	0.4
18 : 0	3.0^f	4.7^b	3.9^c,d	3.4^e,f	3.7^d,e	5.5^a	4.6^b	4.3^b,c	0.2
Total SFA^1	23.8^a	21.0^b	16.8^c	20.5^b	25.7^a	25.0^a	21.8^b	23.8^a	0.6
16 : 1	6.7^a	1.2^c,d	1.7^b,c	0.6^d	6.6^a	2.6^b	3.0^b	2.6^b	0.5
18 : 1	17.4^c	18.2^c	43.5^a	34.8^b	20.8^c	20.7^c	40.5^a	34.6^b	2.1
20 : 1	12.2^a	2.4^b	3.8^b	3.2^b	9.3^a	0.4^c	2.5^b	2.3^b	0.8
22 : 1	15.9^a	1.7^c	0.0^d	2.6^c	11.2^b	0.0^d	0.0^d	0.0^d	1.1
24 : 1	2.0^a	0.0^c	0.0^c	0.0^c	1.8^b	0.0^c	0.0^c	0.0^c	0.2
Total MUFA	54.1^a	23.5^e	49.0^a,b	41.1^c,d	49.6^a,b	23.7^e	46.0^b,c	39.5^d	2.3
18 : 2n-6	5.5^e	32.0^a	13.6^c	11.3^d	6.0^e	26.2^b	12.3^c,d	11.0^d	1.9
20 : 2n-6	0.0^b	2.0^a	0.0^b	0.0^b	0.0^b	2.0^a	0.0^b	0.0^b	0.2
20 : 3n-6	0.0^b	2.3^a	0.0^b	0.0^b	0.0^b	2.3^a	0.5^b	0.0^b	0.2
20 : 4n-6	0.0^b	1.3^a	0.0^b	0.0^b	0.0^b	2.0^a	0.0^b	0.0^b	0.2
22 : 5n-6	0.0^c	0.0^c	0.0^c	3.7^a	0.0^c	0.0^c	0.0^c	3.1^b	0.3
Total n-6^2	5.5^e	37.5^a	13.6^c,d	15.0^c	6.0^e	32.4^b	12.9^d	14.1^c,d	2.3
18 : 3n-3	0.0^d	3.8^a	3.5^a	3.1^b	0.0^d	2.9^b	2.6^c	2.4^c	0.3
20 : 5n-3	2.5^a,b,c	2.1^b,c	4.2^a	1.2^c	2.7^a,b	2.5^a,b	2.7^a,b	2.7^a,b	0.2
22 : 6n-3	14.2^b,c	12.1^c	12.8^c	19.1^a	16.0^a,b,c	13.4^b,c	14.1^b,c	17.6^a,b	0.6
Total n-3	16.7^c	17.9^b,c	20.5^a,b,c	23.3^a	18.7^a,b,c	18.8^a,b,c	19.4^a,b,c	22.7^a,b	0.5
Total PUFA	22.2^d	55.5^a	34.2^b,c	38.4^b	24.7^d	51.3^a	32.2^c	36.8^b,c	2.3
n-3/n-6	3.1^a	0.5^c	1.5^b	1.6^b	3.1^a	0.6^c	1.5^b	1.6^b	0.2
Chemical composition
Dry matter (g/kg)	25.5	26.6	25.1	26.0	25.0	24.4	26.1	26.3	0.4
Crude protein	86.2^b	88.6^a,b	89.0^a,b	88.7^a,b	89.0^a,b	91.1^a	90.2^a	89.0^a,b	0.4
Total lipid	10.6^a	8.1^a,b	7.8^a,b	8.6^a,b	7.7^a,b	5.9^b	6.9^a,b	8.0^a,b	0.4
Ash	5.7	5.8	5.8	6.0	5.7	6.0	5.8	5.8	0.0
Gross energy (MJ/kg DM)	23.8^a	23.3^a,b	23.3^a,b	23.3^a,b	23.2^a,b	22.8^b	23.0^a,b	23.3^a,b	0.1

Data represent the mean ± standard error means of three replicates. Within the same line, different superscripts indicate significant differences (). ¹Includes 15 : 0, 17 : 0, 20 : 0, and 22 : 0. ²Includes 18 : 3n-6.