response to alternative feeds
Wagner, Liane
(2015).
NMR metabolomics and lipid analyses in salmonid tissue.
Diss. (sammanfattning/summary)
Uppsala :
Sveriges lantbruksuniv.,
Acta Universitatis Agriculturae Sueciae, 1652-6880
; 2015:62
ISBN 978-91-576-8322-9
eISBN 978-91-576-8323-6
[Doctoral thesis]
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PDF
977kB |
Abstract
Salmonids are fatty fish and contain high amounts of omega-3 polyunsaturated fatty acids, beneficial in human nutrition. However, the aquaculture industry has expanded greatly in recent decades, increasing demand for fishmeal (FM) and fish oil (FO) for fish feed, while the supply of fish raw materials has remained static or declined. This has created a need for alternative sustainable raw materials for fish feeds.
This thesis examined the effect of replacing FM or FO with alternative plant (vegetable oils (VO), sesamin), microbial (zygomycete-, yeast fungi) and marine (krill, mussel) raw materials on growth performance, lipid content, fatty acid composition, lipid classes and fish metabolism in Atlantic salmon (Salmo salar) and Arctic charr (Salvelinus alpinus).
There was a significant negative effect on growth performance when sesamin, zygomycete fungi and extracted yeast were included in fish diets. Replacement of FM or FO with alternative materials affected the lipid profile in fish tissues, e.g. compared with the control, docosahexaenoic acid (DHA) level was higher in fish fed krill meal and mussel meal and lower in fish fed VO, but unaffected in fish fed extracted and non-extracted yeast and sesamin. Zygomycete fungi meal inclusion decreased fish lipid content, thereby increasing DHA by 54% of total lipid content. Metabolomics analyses revealed an effect on several metabolites depending on the diet. Inclusion of sesamin increased the levels of some metabolites associated with energy metabolism, suggesting metabolic disturbance in the fish. Replacement of FM with non-extracted yeast affected liver metabolites, while extracted yeast mainly increased muscle metabolite levels. These increases suggested that the test ingredients produced a significant response in fish muscle metabolism. The altered metabolic fingerprint in fish fed krill and mussel meal diets compared with FM suggested differences in ingredient composition and physiological response to the diets.
These results provide new information on the effects of non-traditional ingredients on fish metabolism, e.g. lipid-, single-carbon metabolism and tricarboxylic acid cycle. More studies are needed to identify the biochemical mechanisms involved and commercialise alternative fish feed materials.
Authors/Creators: | Wagner, Liane | ||||||||||
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Title: | NMR metabolomics and lipid analyses in salmonid tissue | ||||||||||
Subtitle: | response to alternative feeds | ||||||||||
Series/Journal: | Acta Universitatis Agriculturae Sueciae (1652-6880) | ||||||||||
Year of publishing : | 2015 | ||||||||||
Depositing date: | 19 May 2015 | ||||||||||
Number: | 2015:62 | ||||||||||
Number of Pages: | 67 | ||||||||||
Papers/manuscripts: |
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Place of Publication: | Uppsala | ||||||||||
Publisher: | Department of Food Science, Swedish University of Agricultural Sciences | ||||||||||
ISBN for printed version: | 978-91-576-8322-9 | ||||||||||
ISBN for electronic version: | 978-91-576-8323-6 | ||||||||||
ISSN: | 1652-6880 | ||||||||||
Language: | English | ||||||||||
Publication Type: | Doctoral thesis | ||||||||||
Full Text Status: | Public | ||||||||||
Agris subject categories.: | Q Food science > Q04 Food composition Q Food science > Q54 Feed composition | ||||||||||
Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Food Science | ||||||||||
Agrovoc terms: | salmo salar, chars, fish feeding, metabolism, fatty acids, lignans, docosahexaenoic acid, krill, microorganisms | ||||||||||
Keywords: | Atlantic salmon, Arctic charr, sesamin, krill, mussel, microorganism, zygomycetes fungi, yeast, fish metabolism, fatty acids, DHA | ||||||||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-2669 | ||||||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2669 | ||||||||||
ID Code: | 12241 | ||||||||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||||||||
Department: | (NL, NJ) > Dept. of Food Science (until 161231) | ||||||||||
Deposited By: | Liane Wagner | ||||||||||
Deposited On: | 20 May 2015 08:41 | ||||||||||
Metadata Last Modified: | 10 Sep 2020 13:41 |
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