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Rapid effects of essential fatty acid deficiency on growth and development parameters and transcription of key fatty acid metabolism genes in juvenile barramundi (Lates calcarifer)

Salini, Michael J., Turchini, Giovanni M., Wade, Nicholas M. and Glencross, Brett D. 2015, Rapid effects of essential fatty acid deficiency on growth and development parameters and transcription of key fatty acid metabolism genes in juvenile barramundi (Lates calcarifer), British journal of nutrition, vol. 114, no. 11, pp. 1784-1796, doi: 10.1017/S0007114515003529.

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Title Rapid effects of essential fatty acid deficiency on growth and development parameters and transcription of key fatty acid metabolism genes in juvenile barramundi (Lates calcarifer)
Author(s) Salini, Michael J.
Turchini, Giovanni M.ORCID iD for Turchini, Giovanni M. orcid.org/0000-0003-0694-4283
Wade, Nicholas M.
Glencross, Brett D.
Journal name British journal of nutrition
Volume number 114
Issue number 11
Start page 1784
End page 1796
Total pages 13
Publisher Cambridge University Press (CUP)
Place of publication Cambridge, Eng.
Publication date 2015-09
ISSN 1475-2662
Keyword(s) EFA essential fatty acid
FM fish meal
FO fish oil
GLDH glutamate dehydrogenase
LC-PUFA long-chain PUFA
Aetiology
Barramundi
Deficiency
Essential fatty acids
Summary Barramundi (Lates calcarifer), a catadromous teleost of significant and growing commercial importance, are reported to have limited fatty acid bioconversion capability and therefore require preformed long-chain PUFA (LC-PUFA) as dietary essential fatty acid (EFA). In this study, the response of juvenile barramundi (47·0 g/fish initial weight) fed isolipidic and isoenergetic diets with 8·2 % added oil was tested. The experimental test diets were either devoid of fish oil (FO), and thus with no n-3 LC-PUFA (FO FREE diet), or with a low inclusion of FO (FO LOW diet). These were compared against a control diet containing only FO (FO CTRL diet) as the added lipid source, over an 8-week period. Interim samples and measurements were taken fortnightly during the trial in order to define the aetiology of the onset and progression of EFA deficiency. After 2 weeks, the fish fed the FO FREE and FO LOW diets had significantly lower live-weights, and after 8 weeks significant differences were detected for all performance parameters. The fish fed the FO FREE diet also had a significantly higher incidence of external abnormalities. The transcription of several genes involved in fatty acid metabolism was affected after 2 weeks of feeding, showing a rapid nutritional regulation. This experiment documents the aetiology of the onset and the progression of EFA deficiency in juvenile barramundi and demonstrates that such deficiencies can be detected within 2 weeks in juvenile fish.
Language eng
DOI 10.1017/S0007114515003529
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 ©2015, Cambridge University Press (CUP)
Persistent URL http://hdl.handle.net/10536/DRO/DU:30079366

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Created: Fri, 06 Nov 2015, 09:02:00 EST

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