n-3 Polyunsaturated fatty acid-rich vegetable oils and blends

Tocher, Douglas R., Francis, David S. and Coupland, Keith 2011, n-3 Polyunsaturated fatty acid-rich vegetable oils and blends, in Fish oil replacement and alternative lipid sources in aquaculture feeds, CRC Press, Boca Raton, Flo., pp.209-244.

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Title n-3 Polyunsaturated fatty acid-rich vegetable oils and blends
Author(s) Tocher, Douglas R.
Francis, David S.
Coupland, Keith
Title of book Fish oil replacement and alternative lipid sources in aquaculture feeds
Editor(s) Turchini, Giovanni M.
Ng, Wing-Keong
Tocher, Douglas R.
Publication date 2011
Chapter number 7
Total chapters 15
Start page 209
End page 244
Total pages 36
Publisher CRC Press
Place of Publication Boca Raton, Flo.
Keyword(s) α-linolenic acid
camelina oil
echium oil
flaxseed oil
linseed oil
n-3 polyunsaturated fatty acids
perilla oil
stearidonic acid
vegetable oil blends
Summary α-Linseed, camelina. perilla, and echium oils are n-3 C18 polyunsaturated fatty acid (PUFA)-rich vegetable oil sources viewed as favorable replacements to fish oil in aquaculture feed (aquafeed) production in consideration of their high (α-linolenic acid (ALA, 18:3n-3) and/or stearidonic acid (SDA, 18:4n-3) contents and potential for subsequent bioconversion to n-3 long-chain polyunsaturated fatty acids (LC-PUFA) in farmed aquatic species. While the total production of these oils is currently low in comparison with that of other terrestrial oil sources, their distinct fatty acid composition and high n-3 to n-6 ratio deliver a unique substitute to fish oil in aquafeeds, presently unparalleled in other alternative terrestrial oil sources. The dietary inclusion of these oil sources has therefore attracted significant research attention, resulting in a multitude of investigations across a broad range of aquatic species (finfish and crustaceans). Generally, providing that the essential fatty acid (EFA) requirements of the species under investigation were met and an adequate level of fish meal was present in the diet, it was found possible to replace 100% and 60-70% of the dietary fish oil component for freshwater and marine species, respectively, with minimal impact on growth performance indices. However, the substitution of fish oil with n-3-rich vegetable oils and/or vegetable oil blends resulted in substantially reduced concentrations of health-promoting eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3) in the edible portion of the farmed species. This chapter provides an overview of the use of n-3 PUFA-rich vegetable oils and/or vegetable oil blends for use in aquafeeds. In particular, key aspects of oil production, processing, and refinement will be presented, and individual differences pertaining to the physical, chemical, and nutritional characteristics of the oil types will be highlighted. Following on from this, a summary of the key findings relevant to n-3 PUFA-rich vegetable oil inclusion in aquafeeds will be discussed, with particular emphasis placed on growth performance and nutritional modification.
ISBN 9781439808627
1439808627
Language eng
Field of Research 070401 Aquaculture
Socio Economic Objective 820504 Linseed
HERDC Research category B1 Book chapter
Copyright notice ©2011, CRC Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031364

Document type: Book Chapter
Collection: School of Life and Environmental Sciences
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