Research Article
Algal and Vegetable Oils as Sustainable Fish Oil Substitutes in Rainbow Trout Diets: An Approach to Reduce Contaminant Exposure
Table 1
Feed components and chemical composition of experimental diets (g/kg dry matter).
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18 FO, 18 DP/DE diet with 100% fish oil; 18 SO, 18 DP/DE diet with 75% soybean oil; 18 CO, 18 DP/DE diet with 75% canola oil; 18 COS, 18 DP/DE diet with 75% blend of canola oil and Schizochytrium sp.; 25 FO, 25 DP/DE diet with 100% fish oil; 25 SO, 24 DP/DE diet with 75% soybean oil; 25 CO, 25 DP/DE diet with 75% canola oil; 25 COS, 25 DP/DE diet with 75% blend of canola oil and Schizochytrium sp.; DM, dry matter; DP/DE, digestible protein/digestible energy (lipids). Canola oil, soybean oil, and Schizochytrium sp algae were devoid of PCBs, pesticides, toxaphenes, and flame retardants. Herring meal was found to contain the following: PCBs: 6.5 ppb; pesticides: 2.45 ppb; toxaphenes: 0.41 ppb; flame retardants: 0 ppb. Herring oil was found to contain the following: PCBs: 386 ppb; pesticides: 147 ppb; toxaphenes: 46.8 ppb; flame retardants: 49.9 ppb. 1Salmonid vitamin/trace mineral premix from Corey (Fredericton, NB). 2P/E ratio = protein/energy ratio; calculation based on crude protein and gross energy values determined for the experimental diets. |