Recovery of omega-3 profiles of cultivated abalone by dietary macroalgae supplementation

Mulvaney, William J., Jahangard, Sam, Ingram, Brett A., Turchini, Giovanni M. and Winberg, Pia C. 2015, Recovery of omega-3 profiles of cultivated abalone by dietary macroalgae supplementation, Journal of applied phycology, vol. 27, no. 5, pp. 2163-2171, doi: 10.1007/s10811-015-0530-8.

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Title Recovery of omega-3 profiles of cultivated abalone by dietary macroalgae supplementation
Author(s) Mulvaney, William J.
Jahangard, Sam
Ingram, Brett A.
Turchini, Giovanni M.ORCID iD for Turchini, Giovanni M. orcid.org/0000-0003-0694-4283
Winberg, Pia C.
Journal name Journal of applied phycology
Volume number 27
Issue number 5
Start page 2163
End page 2171
Total pages 9
Publisher Springer
Place of publication Berlin, Germany
Publication date 2015-10
ISSN 0921-8971
Keyword(s) Aquaculture
Fatty acids
Haliotis
Nutrition
Seaweed
Summary Formulated feeds for cultivated abalone have received considerable attention to improve the feeding costs, efficiency and productivity of the growing cultivated abalone industry in Australia. Less attention has been given to the resulting quality of the seafood product from formulated feeds and the effect of the reduction of marine ingredients in these feeds. Marine n-3 fatty acids are particularly important nutritional factors of seafood that are lacking from feed ingredients at the base of the aquaculture production chain. Considering that this important category of nutrients is already deficient in the western diet, further erosion through cultivated seafood products is of concern. This study tested the effect of three diet categories on the fatty acid profiles of commercially farmed abalone. Two commercial formulated feeds, Ulva spp. macroalgae, and combinations of the formulated feeds and macroalgae were fed to six replicate baskets of 20 abalone (~62 mm) for 12 months in Victoria, Australia. The macroalgae diets represented overall lower fatty acid content, including eicosapentaenoic (EPA) and docosahexaenoic (DHA), but higher relative amounts of alpha linolenic acid (ALA) and docosapentaenoic acid (DPA), than the formulated feeds. The total lipid content of abalone tissue did not vary substantially across diet categories; however, the ratio of n-6:n-3 fatty acids decreased incrementally with the increasing macroalgae content in the diet and by a factor of two with a 100 % macroalgae diet. Also, equal or higher content of all important long chain n-3 fatty acids was achieved with a macroalgae diet despite the lower dietary content of some of these fatty acids. Marine fatty acid-deplete aquaculture feeds can result in decreased n-3 fatty acid content in the abalone tissue. The inclusion of macroalgae in the diet of abalone can offset this reduction.
Language eng
DOI 10.1007/s10811-015-0530-8
Field of Research 070401 Aquaculture
0704 Fisheries Sciences
0607 Plant Biology
1002 Environmental Biotechnology
Socio Economic Objective 830103 Aquaculture Molluscs (excl. Oysters)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30077415

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