Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass
Oleaginous yeast has shown to be a promising alternative to replace vegetable oils in fish feed. A problem in aquaculture is that different growth rates can be observed among farm-raised fish, supressing the productions full potential. When different growth rates are observed, it can be questioned i...
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ftsluppsalast:oai:stud.epsilon.slu.se:18201 2023-05-15T14:26:03+02:00 Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass Jacobsson, Sofia 2022-08-16 application/pdf https://stud.epsilon.slu.se/18201/1/jacobsson-s-220816.pdf sv eng swe eng https://stud.epsilon.slu.se/18201/ urn:nbn:se:slu:epsilon-s-18201 https://stud.epsilon.slu.se/18201/1/jacobsson-s-220816.pdf Jacobsson, Sofia, 2022. Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass : a comparison between large and small specimens. Second cycle, A2E. Uppsala: (NL, NJ) > Department of Molecular Sciences <https://stud.epsilon.slu.se/view/divisions/OID-425.html> Food science and technology Second cycle, A2E NonPeerReviewed 2022 ftsluppsalast 2022-09-10T18:13:21Z Oleaginous yeast has shown to be a promising alternative to replace vegetable oils in fish feed. A problem in aquaculture is that different growth rates can be observed among farm-raised fish, supressing the productions full potential. When different growth rates are observed, it can be questioned if the fish assimilate the feed to the same extent. Therefore, the aim of this study was to analyse the lipid content, fatty acid composition and lipid groups of large and small specimens of Arctic char (Salvelinus alpinus), fed with either control feed or feed containing biomass of the oleaginous yeast species Rhodotorula toruloides, to examine the fish welfare, performance and intake of feed in fish of different size. Lipid extraction followed by gas chromatography was used to analyse the fat content and fatty acid composition in 16 fish. Furthermore, thin layer chromatography was performed to analyse lipids groups. No significant differences in lipid content, fatty acid composition or lipid groups could be observed between large and small specimens fed either control of yeast feed. However, small fish tend to have higher levels of polyunsaturated fatty acids. The result of this trial indicates that there is no difference is feed assimilation between large and small specimens of Arctic char (S. alpinus). Lipidackumulerande jäst har visat sig vara ett lovande alternativ till att ersätta vegetabiliska oljor i fiskfoder. Ett problem inom akvakultur är storleksskillnader mellan fiskar som föds upp tillsammans, vilket hindrar produktionens fulla potential. Således kan tillgodogörandet av fodret hos fiskarna ifrågasättas när betydande storlekskillnader kan observeras. Därav var syftet med denna studie att analysera fetthalten, fettsyrasammansättningen och lipidgrupperna i stora och små exemplar av röding (Salvelinus alpinus), utfodrade med kontrollfoder eller foder som innehåller biomassa av den lipidackumulerande jästarten Rhodotorula toruloides, för att undersöka foderintaget hos fisk av olika storlek. Lipidextraktion ... Text Arctic Arctic Salvelinus alpinus Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects Arctic |
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Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects |
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Swedish English |
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Food science and technology |
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Food science and technology Jacobsson, Sofia Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass |
topic_facet |
Food science and technology |
description |
Oleaginous yeast has shown to be a promising alternative to replace vegetable oils in fish feed. A problem in aquaculture is that different growth rates can be observed among farm-raised fish, supressing the productions full potential. When different growth rates are observed, it can be questioned if the fish assimilate the feed to the same extent. Therefore, the aim of this study was to analyse the lipid content, fatty acid composition and lipid groups of large and small specimens of Arctic char (Salvelinus alpinus), fed with either control feed or feed containing biomass of the oleaginous yeast species Rhodotorula toruloides, to examine the fish welfare, performance and intake of feed in fish of different size. Lipid extraction followed by gas chromatography was used to analyse the fat content and fatty acid composition in 16 fish. Furthermore, thin layer chromatography was performed to analyse lipids groups. No significant differences in lipid content, fatty acid composition or lipid groups could be observed between large and small specimens fed either control of yeast feed. However, small fish tend to have higher levels of polyunsaturated fatty acids. The result of this trial indicates that there is no difference is feed assimilation between large and small specimens of Arctic char (S. alpinus). Lipidackumulerande jäst har visat sig vara ett lovande alternativ till att ersätta vegetabiliska oljor i fiskfoder. Ett problem inom akvakultur är storleksskillnader mellan fiskar som föds upp tillsammans, vilket hindrar produktionens fulla potential. Således kan tillgodogörandet av fodret hos fiskarna ifrågasättas när betydande storlekskillnader kan observeras. Därav var syftet med denna studie att analysera fetthalten, fettsyrasammansättningen och lipidgrupperna i stora och små exemplar av röding (Salvelinus alpinus), utfodrade med kontrollfoder eller foder som innehåller biomassa av den lipidackumulerande jästarten Rhodotorula toruloides, för att undersöka foderintaget hos fisk av olika storlek. Lipidextraktion ... |
format |
Text |
author |
Jacobsson, Sofia |
author_facet |
Jacobsson, Sofia |
author_sort |
Jacobsson, Sofia |
title |
Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass |
title_short |
Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass |
title_full |
Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass |
title_fullStr |
Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass |
title_full_unstemmed |
Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass |
title_sort |
fatty acid composition in arctic char (salvelinus alpinus) fed with red yeast biomass |
publishDate |
2022 |
url |
https://stud.epsilon.slu.se/18201/1/jacobsson-s-220816.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Salvelinus alpinus |
genre_facet |
Arctic Arctic Salvelinus alpinus |
op_relation |
https://stud.epsilon.slu.se/18201/ urn:nbn:se:slu:epsilon-s-18201 https://stud.epsilon.slu.se/18201/1/jacobsson-s-220816.pdf Jacobsson, Sofia, 2022. Fatty acid composition in Arctic char (Salvelinus alpinus) fed with red yeast biomass : a comparison between large and small specimens. Second cycle, A2E. Uppsala: (NL, NJ) > Department of Molecular Sciences <https://stud.epsilon.slu.se/view/divisions/OID-425.html> |
_version_ |
1766298526604591104 |