Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae
Microalgae, as primary producers of EPA and DHA, are among the most prominent alternative sources to fish oil for n-3 long-chain PUFA in animal and human nutrition. The present study aimed to assess technical, nutritional and fish health aspects of producing n-3-rich Atlantic salmon (Salmo salar) fi...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2015-01-01
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| Series: | Journal of Nutritional Science |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S2048679015000142/type/journal_article |
| _version_ | 1811155978433855488 |
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| author | Katerina Kousoulaki Tone-Kari Knutsdatter Østbye Aleksei Krasnov Jacob Seilø Torgersen Turid Mørkøre John Sweetman |
| author_facet | Katerina Kousoulaki Tone-Kari Knutsdatter Østbye Aleksei Krasnov Jacob Seilø Torgersen Turid Mørkøre John Sweetman |
| author_sort | Katerina Kousoulaki |
| collection | DOAJ |
| description | Microalgae, as primary producers of EPA and DHA, are among the most prominent alternative sources to fish oil for n-3 long-chain PUFA in animal and human nutrition. The present study aimed to assess technical, nutritional and fish health aspects of producing n-3-rich Atlantic salmon (Salmo salar) fish fillets by dietary supplementation of increasing levels of a DHA-producing Schizochytrium sp. and reduced or without use of supplemental fish oil. Atlantic salmon smolt were fed diets with graded levels of microalgae for 12 weeks, during which all fish showed high feed intake rates with postprandial plasma leptin levels inversely correlating with final mean fish body weights. Fish performance was optimal in all experimental treatments (thermal growth coefficient about 4·0 and feed conversion ratio 0·8–0·9), protein digestibility was equal in all diets, whereas dietary lipid digestibility inversely correlated with the dietary levels of the SFA 16 : 0. Fillet quality was good and similar to the control in all treatments in terms of n-3 long-chain PUFA content, gaping, texture and liquid losses during thawing. Histological fluorescence staining and immunofluorescence analysis of salmon intestines (midgut: base of intestine and villi) revealed significant effects on slime, goblet cell production and inducible nitric oxide synthase (iNOS) activity with increasing levels of dietary Schizochytrium sp. supplementation. Microarray analysis did not reveal any signs of toxicity, stress, inflammation or any other negative effects from Schizochytrium sp. supplementation in diets for Atlantic salmon. |
| first_indexed | 2024-04-10T04:43:51Z |
| format | Article |
| id | doaj.art-40df1f406d1240a6b38407251bd3b7bb |
| institution | Directory Open Access Journal |
| issn | 2048-6790 |
| language | English |
| last_indexed | 2024-04-10T04:43:51Z |
| publishDate | 2015-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Nutritional Science |
| spelling | doaj.art-40df1f406d1240a6b38407251bd3b7bb2023-03-09T12:38:43ZengCambridge University PressJournal of Nutritional Science2048-67902015-01-01410.1017/jns.2015.14Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgaeKaterina Kousoulaki0Tone-Kari Knutsdatter Østbye1Aleksei Krasnov2Jacob Seilø Torgersen3Turid Mørkøre4John Sweetman5Nofima AS, Department of Nutrition and Feed Technology, N-5141 Fyllingsdalen, NorwayNofima AS, Department of Nutrition and Feed Technology, N-5141 Fyllingsdalen, NorwayNofima AS, Department of Nutrition and Feed Technology, N-5141 Fyllingsdalen, NorwayNofima AS, Department of Nutrition and Feed Technology, N-5141 Fyllingsdalen, NorwayNofima AS, Department of Nutrition and Feed Technology, N-5141 Fyllingsdalen, NorwayAlltech Inc., Sarney, Dunboyne, County Meath, Republic of IrelandMicroalgae, as primary producers of EPA and DHA, are among the most prominent alternative sources to fish oil for n-3 long-chain PUFA in animal and human nutrition. The present study aimed to assess technical, nutritional and fish health aspects of producing n-3-rich Atlantic salmon (Salmo salar) fish fillets by dietary supplementation of increasing levels of a DHA-producing Schizochytrium sp. and reduced or without use of supplemental fish oil. Atlantic salmon smolt were fed diets with graded levels of microalgae for 12 weeks, during which all fish showed high feed intake rates with postprandial plasma leptin levels inversely correlating with final mean fish body weights. Fish performance was optimal in all experimental treatments (thermal growth coefficient about 4·0 and feed conversion ratio 0·8–0·9), protein digestibility was equal in all diets, whereas dietary lipid digestibility inversely correlated with the dietary levels of the SFA 16 : 0. Fillet quality was good and similar to the control in all treatments in terms of n-3 long-chain PUFA content, gaping, texture and liquid losses during thawing. Histological fluorescence staining and immunofluorescence analysis of salmon intestines (midgut: base of intestine and villi) revealed significant effects on slime, goblet cell production and inducible nitric oxide synthase (iNOS) activity with increasing levels of dietary Schizochytrium sp. supplementation. Microarray analysis did not reveal any signs of toxicity, stress, inflammation or any other negative effects from Schizochytrium sp. supplementation in diets for Atlantic salmon.https://www.cambridge.org/core/product/identifier/S2048679015000142/type/journal_article n-3 Long-chain PUFAFarmed salmon fish fillet nutritional qualityMicroalgae |
| spellingShingle | Katerina Kousoulaki Tone-Kari Knutsdatter Østbye Aleksei Krasnov Jacob Seilø Torgersen Turid Mørkøre John Sweetman Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae Journal of Nutritional Science n-3 Long-chain PUFA Farmed salmon fish fillet nutritional quality Microalgae |
| title | Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae |
| title_full | Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae |
| title_fullStr | Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae |
| title_full_unstemmed | Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae |
| title_short | Metabolism, health and fillet nutritional quality in Atlantic salmon (Salmo salar) fed diets containing n-3-rich microalgae |
| title_sort | metabolism health and fillet nutritional quality in atlantic salmon salmo salar fed diets containing n 3 rich microalgae |
| topic | n-3 Long-chain PUFA Farmed salmon fish fillet nutritional quality Microalgae |
| url | https://www.cambridge.org/core/product/identifier/S2048679015000142/type/journal_article |
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