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Marginal efficiencies of long chain-polyunsaturated fatty acid use by barramundi (Lates calcarifer) when fed diets with varying blends of fish oil and poultry fat

Salini, Michael, Irvin, Simon, Bourne, Nicholas, Blyth, David, Cheers, Sue, Habilay, Natalie and Glencross, Brett 2015, Marginal efficiencies of long chain-polyunsaturated fatty acid use by barramundi (Lates calcarifer) when fed diets with varying blends of fish oil and poultry fat, Aquaculture, vol. 449, doi: 10.1016/j.aquaculture.2015.02.027.

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Title Marginal efficiencies of long chain-polyunsaturated fatty acid use by barramundi (Lates calcarifer) when fed diets with varying blends of fish oil and poultry fat
Author(s) Salini, Michael
Irvin, Simon
Bourne, Nicholas
Blyth, David
Cheers, Sue
Habilay, Natalie
Glencross, Brett
Journal name Aquaculture
Volume number 449
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-02-27
ISSN 0044-8486
Keyword(s) Fatty acid
Fish oil
LC-PUFA
Marginal efficiency
Poultry fat
Science & Technology
Life Sciences & Biomedicine
Fisheries
Marine & Freshwater Biology
SALMON SALMO-SALAR
BASS DICENTRARCHUS-LABRAX
FRESH-WATER FISH
ASIAN SEA-BASS
DOCOSAHEXAENOIC ACID
VEGETABLE-OILS
SPARUS-AURATA
RAPESEED OIL
ONCORHYNCHUS-MYKISS
FEED-UTILIZATION
Summary An experiment was conducted with barramundi (Lates calcarifer) juveniles to examine the marginal efficiency of utilisation of long chain-polyunsaturated fatty acids (LC-PUFA). A series of five diets with blends of fish (anchovy) oil and poultry fat (F100:P0, F60:P40, F30:P70, F15:P85, F0:P100) were fed to 208. ±. 4.1. g fish over a 12-week period. The replacement of fish oil with poultry fat had no impact on growth performance (average final weight of 548.3. ±. 10.2. g) or feed conversion (mean = 1.14. ±. 0.02). Analysis of the whole body composition showed that the fatty acid profile reflected that of the fed diet. However it was also shown that there was a disproportional retention of some fatty acids relative to others (notably LOA, 18:2n-6 and LNA, 18:3n-3). By examining the body mass independent retention of different fatty acids with differential levels of intake of each, the marginal efficiencies of the use of these nutrients by this species were able to be determined. The differential retention of fatty acids in the meat was also examined allowing the determination of oil blending strategies to optimise meat n-3 LC-PUFA levels.
Language eng
DOI 10.1016/j.aquaculture.2015.02.027
Field of Research 070401 Aquaculture
0704 Fisheries Sciences
0608 Zoology
Socio Economic Objective 830102 Aquaculture Fin Fish (excl. Tuna)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071778

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