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n-3 LC-PUFA deposition efficiency and appetite regulating hormones are modulated by the dietary lipid source during rainbow trout grow-out and finishing periods

Francis, D.S., Thanuthong, T., Senadheera, S.P.S.D., Paolucci, M., Coccia, E., De Silva, S.S and Turchini, G.M. 2014, n-3 LC-PUFA deposition efficiency and appetite regulating hormones are modulated by the dietary lipid source during rainbow trout grow-out and finishing periods, Fish physiology and biochemistry, vol. 40, no. 2, pp. 577-593, doi: 10.1007/s10695-013-9868-5.

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Title n-3 LC-PUFA deposition efficiency and appetite regulating hormones are modulated by the dietary lipid source during rainbow trout grow-out and finishing periods
Author(s) Francis, D.S.ORCID iD for Francis, D.S. orcid.org/0000-0002-4829-6926
Thanuthong, T.
Senadheera, S.P.S.D.
Paolucci, M.
Coccia, E.
De Silva, S.S
Turchini, G.M.ORCID iD for Turchini, G.M. orcid.org/0000-0003-0694-4283
Journal name Fish physiology and biochemistry
Volume number 40
Issue number 2
Start page 577
End page 593
Total pages 19
Publisher Springer
Place of publication Berlin, Germany
Publication date 2014
ISSN 1573-5168
0920-1742
Keyword(s) Fish oil replacement
Oncorhynchus mykiss
Omega-3
Leptin
Ghrelin
Linseed oil
Olive oil
Palm oil
Sunflower oil
Summary Largely attributable to concerns surrounding sustainability, the utilisation of omega-3 long-chain polyunsaturated fatty acid-rich (n-3 LC-PUFA) fish oils in aquafeeds for farmed fish species is an increasingly concerning issue. Therefore, strategies to maximise the deposition efficiency of these key health beneficial fatty acids are being investigated. The present study examined the effects of four vegetable-based dietary lipid sources (linseed, olive, palm and sunflower oil) on the deposition efficiency of n-3 LC-PUFA and the circulating blood plasma concentrations of the appetite-regulating hormones, leptin and ghrelin, during the grow-out and finishing phases in rainbow trout culture. Minimal detrimental effects were noted in fish performance; however, major modifications were apparent in tissue fatty acid compositions, which generally reflected that of the diet. These modifications diminished somewhat following the fish oil finishing phase, but longer-lasting effects remained evident. The fatty acid composition of the alternative oils was demonstrated to have a modulatory effect on the deposition efficiency of n-3 LC-PUFA and on the key endocrine hormones involved in appetite regulation, growth and feed intake during both the grow-out and finishing phases. In particular, n-6 PUFA (sunflower oil diet) appeared to ‘spare’ the catabolism of n-3 LC-PUFA and, as such, resulted in the highest retention of these fatty acids, ultimately highlighting new nutritional approaches to maximise the maintenance of the qualitative benefits of fish oils when they are used in feeds for aquaculture species.
Language eng
DOI 10.1007/s10695-013-9868-5
Field of Research 070401 Aquaculture
Socio Economic Objective 830102 Aquaculture Fin Fish (excl. Tuna)
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2014, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30060946

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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Created: Fri, 21 Feb 2014, 09:06:55 EST

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