Viability of tallow inclusion in Atlantic salmon diet, as assessed by an on-farm grow out trial

Emery, James A., Smullen, Richard, Keast, Russell S. J. and Turchini, Giovanni M. 2016, Viability of tallow inclusion in Atlantic salmon diet, as assessed by an on-farm grow out trial, Aquaculture, vol. 451, pp. 289-297, doi: 10.1016/j.aquaculture.2015.09.023.

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Title Viability of tallow inclusion in Atlantic salmon diet, as assessed by an on-farm grow out trial
Author(s) Emery, James A.
Smullen, Richard
Keast, Russell S. J.ORCID iD for Keast, Russell S. J.
Turchini, Giovanni M.ORCID iD for Turchini, Giovanni M.
Journal name Aquaculture
Volume number 451
Start page 289
End page 297
Total pages 9
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-01-20
ISSN 0044-8486
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Marine & Freshwater Biology
Animal by-products
Fish oil
Poultry oil
Salmo salar
Summary The results of a recent increase in research interest directed at the inclusion of tallow in fish feed formulations are suggesting tallow is viable as a potential substitute for other alternative lipid sources such as poultry by-product oil. Although strong growth performance data has been shown, reservations still exist regarding reduced digestibility and the potential impacts this could have on performance over the duration of a grow-out period in low temperature conditions. Also little information is yet available on the potential effect of dietary tallow inclusion on final product quality. A large scale farm based study testing the inclusion of tallow at 40% inclusion, partially replacing poultry by-product oil, in commercial diets of Atlantic salmon over a winter grow-out period in southern Tasmania, Australia was conducted. Tallow inclusion had no impact on growth performance or nutrient digestibility. Tallow resulted in a slight improvement in fillet quality exhibiting a significant reduction in n - 6 PUFA and the n6:n3 ratio, and an increased n - 3LC-PUFA tissue deposition. Consumers were unable to display any preference in liking between 3 salmon products (cold smoked, hot smoked, and cooked) as a result of tallow inclusion. This study demonstrates the viability of partial inclusion of tallow in Atlantic salmon diets over a winter grow-out period. Statement of relevance: Improved knowledge of alternative dietary energy sources (oils and fats) to be used in aquafeed, (replacing the increasingly expensive, and diminishingly available, fish oil) is a key area of research towards improved environmental sustainability and economic viability of the aquaculture sector. Following a promising laboratory based, research scale, in vivo trial aimed at assessing the viability of tallow in salmon feed, a larger and longer duration farm-based trial was implemented to validate initial findings. Consumer test of final products (fresh-cooked, hot smoked and cold smoked fillets) showed no modification of sensorial attributes. Tallow is hereto shown to be a highly viable alternative oil for the salmon aquafeed industry.
Language eng
DOI 10.1016/j.aquaculture.2015.09.023
Field of Research 070401 Aquaculture
0704 Fisheries Sciences
0608 Zoology
Socio Economic Objective 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
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