n-3 Oil sources for use in aquaculture--alternatives to the unsustainable harvest of wild fish.
The present review examines renewable sources of oils with n-3 long-chain (> or = C20) PUFA (n-3 LC-PUFA) as alternatives to oil from wild-caught fish in aquafeeds. Due to the increased demand for and price of wild-caught marine sources of n-3 LC-PUFA-rich oil, their effective and sustainable replacement in aquafeeds is an industry priority, especially because dietary n-3 LC-PUFA from eating fish are known to have health benefits in human beings. The benefits and challenges involved in changing dietary oil in aquaculture are highlighted and four major potential sources of n-3 LC-PUFA for aquafeeds, other than fish oil, are compared. These sources of oil, which contain n-3 LC-PUFA, specifically EPA (20:5n-3) and DHA (22:6n-3) or precursors to these key essential fatty acids, are: (1) other marine sources of oil; (2) vegetable oils that contain biosynthetic precursors, such as stearidonic acid, which may be used by fish to produce n-3 LC-PUFA; (3) single-cell oil sources of n-3 LC-PUFA; (4) vegetable oils derived from oil-seed crops that have undergone genetic modification to contain n-3 LC-PUFA. The review focuses on Atlantic salmon (Salmo salar L.), because it is the main intensively cultured finfish species and it both uses and stores large amounts of oil, in particular n-3 LC-PUFA, in the flesh.
Miller
Matthew R
MR
CSIRO Food Futures Flagship and Division of Marine and Atmospheric Research, GPO Box 1538, Hobart, Tasmania 7001, Australia. MillerM@crop.cri.nz
Nichols
Peter D
PD
Carter
Chris G
CG
D000821:Animal Feed; D000818:Animals; D017756:Aquaculture / Q000379:methods*; D003247:Conservation of Natural Resources; D015525:Fatty Acids, Omega-3 / Q000600:supply & distribution*; D043371:Fatty Acids, Omega-6 / Q000600:supply & distribution; D005395:Fish Oils / Q000600:supply & distribution*; D030841:Food, Genetically Modified; D006801:Humans; D010840:Phytosterols; D010938:Plant Oils / Q000737:chemistry; D012474:Salmon; D017747:Seafood
D015525:Fatty Acids, Omega-3; D043371:Fatty Acids, Omega-6; D005395:Fish Oils; D010840:Phytosterols; D010938:Plant Oils