Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/3095
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: n-3 and n-6 fatty acid bioconversion abilities in Eurasian perch (Perca fluviatilis) at two developmental stages
Authors: Henrotte, Emilie
Kpogue, Diane
Mandiki, Syaghalirwa N M
Wang, Neil
Douxfils, Jessica
Dick, James R
Tocher, Douglas R
Kestemont, Patrick
Contact Email: drt1@stir.ac.uk
Keywords: Perch
Lipid and fatty acid metabolism
Liver
Long-chain polyunsaturated fatty acid
Biosynthesis
Desaturation
Elongation
Juveniles
Adults
Issue Date: Apr-2011
Publisher: Wiley-Blackwell
Citation: Henrotte E, Kpogue D, Mandiki SNM, Wang N, Douxfils J, Dick JR, Tocher DR & Kestemont P (2011) n-3 and n-6 fatty acid bioconversion abilities in Eurasian perch (Perca fluviatilis) at two developmental stages, Aquaculture Nutrition, 17 (2), pp. e216-e225.
Abstract: The aim of this work was to study the fatty acid (FA) bioconversion ability in Eurasian perch fed with diets differing in their polyunsaturated fatty acids (PUFA) from n-3 and n-6 series content at two development stages: adults in exogenous vitellogenesis, and juveniles during the on-growing phase. Duplicate groups of adults and juveniles were fed for 12 weeks with four diets: D1 and D2, two diets prepared with fish oil partially or totally as the lipid source, and so containing long-chain PUFA (LC-PUFA). Those two diets differed by their n-3/n-6 FA dietary ratio (0.2 and 7.0, respectively), D1 being characterized by a high n-6 LC-PUFA level, while D2 had a high level of n-3 LC-PUFA. D3 and D4 were constituted only with vegetable oils, and were therefore devoid of LC-PUFA. D3 was characterized by a high level of 18:2 n-6 (n-6/n-3 ratio of 0.3), while D4 was characterized by a high level of 18:3 n-3 (n-3/n-6 ratio of 1.9). Both groups of fish were able to elongate and desaturate the 18:3 n-3 precursor into eicosapentaenoic acid and docosahexaenoic acid, regarding the FA profile of livers. Furthermore, total elongation/desaturation from [1-14C]18:3 n-3 of LC-PUFA was higher in fish fed with the high dietary 18:3 n-3 level compared to the diet rich in n-3 LC-PUFA. By opposition, the bioconversion of 18:2 n-6 into LC-PUFA was limited, regarding the elongation/desaturation activity of LC-PUFA from [1-14C]18:2 n-6. In view of the great ability for bioconversion of n-3 FA, linseed oil is a promising alternative to fish oil in formulating feed for juveniles perch as there were no differences in terms of specific growth rate between the treatments, but adults undergoing maturation should have at least partially LC-PUFA in their diet, particularly arachidonic acid (ARA) which is important during maturation, as breeders are not able to bioconvert 18:2 n-6 into ARA.
Type: Journal Article
URI: http://hdl.handle.net/1893/3095
DOI Link: http://dx.doi.org/10.1111/j.1365-2095.2010.00754.x
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Namur
University of Namur
University of Namur
University of Namur
University of Namur
Aquaculture
Aquaculture
University of Namur

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