Fatty acid metabolism in European sea bass (Dicentrarchus labrax) : effects of n-6 PUFA and MUFA in fish oil replaced diets

Eroldogan, Tufan O., Yılmaz, Asuman H., Turchini, Giovanni M., Arslan, Murat, Sirkecioglu, Necdet A., Engin, Kenan, Ozsahinoglu, Ilgin and Mumogullarında, Pınar 2013, Fatty acid metabolism in European sea bass (Dicentrarchus labrax) : effects of n-6 PUFA and MUFA in fish oil replaced diets, Fish physiology and biochemistry, vol. 39, no. 4, pp. 941-955.

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Title Fatty acid metabolism in European sea bass (Dicentrarchus labrax) : effects of n-6 PUFA and MUFA in fish oil replaced diets
Author(s) Eroldogan, Tufan O.
Yılmaz, Asuman H.
Turchini, Giovanni M.
Arslan, Murat
Sirkecioglu, Necdet A.
Engin, Kenan
Ozsahinoglu, Ilgin
Mumogullarında, Pınar
Journal name Fish physiology and biochemistry
Volume number 39
Issue number 4
Start page 941
End page 955
Total pages 15
Publisher Springer Netherlands
Place of publication Amsterdam, The Netherlands
Publication date 2013
ISSN 1573-5168
0920-1742
Keyword(s) dicentrarchus labrax
canola oil
cottonseed oil
elongase
Summary Monounsaturated fatty acids (MUFA)-rich and n-6 polyunsaturated fatty acid (n-6 PUFA)-rich vegetable oils are increasingly used as fish oil replacers for aquafeed formulation. The present study investigated the fatty acid metabolism in juvenile European sea bass (Dicentrarchus labrax, 38.4 g) fed diets containing fish oil (FO, as the control treatment) or two different vegetable oils (the MUFA-rich canola/rapeseed oil, CO, and the n-6 PUFA-rich cottonseed oil, CSO) tested individually or as a 50/50 blend (CO/CSO). The whole-body fatty acid balance method was used to deduce the apparent in vivo fatty acid metabolism. No effect on growth performance and feed utilization was recorded. However, it should be noted that the fish meal content of the experimental diets was relatively high, and thus the requirement for n-3 long-chain polyunsaturated fatty acid (n-3 LC-PUFA) may have likely been fulfilled even if dietary fish oil was fully replaced by vegetable oils. Overall, relatively little apparent in vivo fatty acid bioconversion was recorded, whilst the apparent in vivo ?-oxidation of dietary fatty acid was largely affected by the dietary lipid source, with higher rate of ?-oxidation for those fatty acids which were provided in dietary surplus. The deposition of 20:5n-3 and 22:6n-3, as % of the dietary intake, was greatest for the fish fed on the CSO diet. It has been shown that European sea bass seems to be able to efficiently use n-6 PUFA for energy substrate, and this may help in minimizing the ?-oxidation of the health benefiting n-3 LC-PUFA and thus increase their deposition into fish tissues.
Language eng
Field of Research 070401 Aquaculture
Socio Economic Objective 830102 Aquaculture Fin Fish (excl. Tuna)
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055450

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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