Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets
Aquaculture contributes to global food security but sustainable aquaculture development in terms of biodiversity impacts requires the establishment of viable solutions in replacement of the fisheries-based components in aquafeeds. In the current work, pit-tagged Atlantic salmon individuals were grow...
Published in: | Frontiers in Marine Science |
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Online Access: | https://doi.org/10.3389/fmars.2020.00057 https://doaj.org/article/7fd2c1e968f647a7ada89b4569a3c47c |
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ftdoajarticles:oai:doaj.org/article:7fd2c1e968f647a7ada89b4569a3c47c 2023-05-15T15:32:16+02:00 Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets Kousoulaki Katerina Gerd Marit Berge Mørkøre Turid Krasnov Aleksei Baeverfjord Grete Ytrestøyl Trine Carlehög Mats Sweetman John Ruyter Bente 2020-02-01T00:00:00Z https://doi.org/10.3389/fmars.2020.00057 https://doaj.org/article/7fd2c1e968f647a7ada89b4569a3c47c EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2020.00057/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00057 https://doaj.org/article/7fd2c1e968f647a7ada89b4569a3c47c Frontiers in Marine Science, Vol 7 (2020) DHA Atlantic salmon n-3 LC-PUFA filet quality Schizochytrium limacinum Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.00057 2022-12-31T04:03:06Z Aquaculture contributes to global food security but sustainable aquaculture development in terms of biodiversity impacts requires the establishment of viable solutions in replacement of the fisheries-based components in aquafeeds. In the current work, pit-tagged Atlantic salmon individuals were grown, from fresh water (18 g body weight) to salt water in tanks (up to 800 g body weight), on diets with low fish meal (FM) (10%) and 1–1.25% total n-3 LC-PUFA levels balanced across the experimental diets. Dietary n-3 LC-PUFAs were supplemented by (1) fish oil (FO), (2) Schizochytrium limacinum biomass (ScB), or (3) a mix of the two (FO/ScB). Further, the fish from all treatments were mixed and redistributed in sea cages reared to slaughter (ca. 3 kg body weight) on either FO or ScB. As FO was rich in both EPA and DHA and ScB was rich in DHA and nearly devoid of EPA, the experimental diets differed significantly in DHA/EPA ratio (0.8 vs. 10.5 in average for FO and ScB, respectively). ScB treatment fish grew to significantly higher body weight in the end of the experiment (2.8 kg vs. 3.3 kg, for FO and ScB, respectively) but similar FCR, survival rate, and biometric indexes compared to the FO groups. ScB fish contained higher levels of EPA + DHA in the filet but lower in the liver, and better filet pigmentation already from the tank phase of the experiment as determined chemically, by salmonfan and a trained sensory panel, and lower prevalence of melanin spots at slaughter. The trained sensory panel found no differences in flavor or odor in the filets from the different dietary groups; however, filets in the FO group were perceived as softer and juicier compared to ScB. The pre-diets up to 800 g body weight had minor effects on fish performance. Global transcriptomics in liver and intestinal tissues revealed significant dietary effects on the expression of immune modulating, as well as ion, lipid, protein, and xenobiotic metabolism genes. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
DHA Atlantic salmon n-3 LC-PUFA filet quality Schizochytrium limacinum Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
DHA Atlantic salmon n-3 LC-PUFA filet quality Schizochytrium limacinum Science Q General. Including nature conservation geographical distribution QH1-199.5 Kousoulaki Katerina Gerd Marit Berge Mørkøre Turid Krasnov Aleksei Baeverfjord Grete Ytrestøyl Trine Carlehög Mats Sweetman John Ruyter Bente Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets |
topic_facet |
DHA Atlantic salmon n-3 LC-PUFA filet quality Schizochytrium limacinum Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Aquaculture contributes to global food security but sustainable aquaculture development in terms of biodiversity impacts requires the establishment of viable solutions in replacement of the fisheries-based components in aquafeeds. In the current work, pit-tagged Atlantic salmon individuals were grown, from fresh water (18 g body weight) to salt water in tanks (up to 800 g body weight), on diets with low fish meal (FM) (10%) and 1–1.25% total n-3 LC-PUFA levels balanced across the experimental diets. Dietary n-3 LC-PUFAs were supplemented by (1) fish oil (FO), (2) Schizochytrium limacinum biomass (ScB), or (3) a mix of the two (FO/ScB). Further, the fish from all treatments were mixed and redistributed in sea cages reared to slaughter (ca. 3 kg body weight) on either FO or ScB. As FO was rich in both EPA and DHA and ScB was rich in DHA and nearly devoid of EPA, the experimental diets differed significantly in DHA/EPA ratio (0.8 vs. 10.5 in average for FO and ScB, respectively). ScB treatment fish grew to significantly higher body weight in the end of the experiment (2.8 kg vs. 3.3 kg, for FO and ScB, respectively) but similar FCR, survival rate, and biometric indexes compared to the FO groups. ScB fish contained higher levels of EPA + DHA in the filet but lower in the liver, and better filet pigmentation already from the tank phase of the experiment as determined chemically, by salmonfan and a trained sensory panel, and lower prevalence of melanin spots at slaughter. The trained sensory panel found no differences in flavor or odor in the filets from the different dietary groups; however, filets in the FO group were perceived as softer and juicier compared to ScB. The pre-diets up to 800 g body weight had minor effects on fish performance. Global transcriptomics in liver and intestinal tissues revealed significant dietary effects on the expression of immune modulating, as well as ion, lipid, protein, and xenobiotic metabolism genes. |
format |
Article in Journal/Newspaper |
author |
Kousoulaki Katerina Gerd Marit Berge Mørkøre Turid Krasnov Aleksei Baeverfjord Grete Ytrestøyl Trine Carlehög Mats Sweetman John Ruyter Bente |
author_facet |
Kousoulaki Katerina Gerd Marit Berge Mørkøre Turid Krasnov Aleksei Baeverfjord Grete Ytrestøyl Trine Carlehög Mats Sweetman John Ruyter Bente |
author_sort |
Kousoulaki Katerina |
title |
Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets |
title_short |
Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets |
title_full |
Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets |
title_fullStr |
Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets |
title_full_unstemmed |
Microalgal Schizochytrium limacinum Biomass Improves Growth and Filet Quality When Used Long-Term as a Replacement for Fish Oil, in Modern Salmon Diets |
title_sort |
microalgal schizochytrium limacinum biomass improves growth and filet quality when used long-term as a replacement for fish oil, in modern salmon diets |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00057 https://doaj.org/article/7fd2c1e968f647a7ada89b4569a3c47c |
long_lat |
ENVELOPE(-85.633,-85.633,-78.617,-78.617) |
geographic |
Slaughter |
geographic_facet |
Slaughter |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2020.00057/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00057 https://doaj.org/article/7fd2c1e968f647a7ada89b4569a3c47c |
op_doi |
https://doi.org/10.3389/fmars.2020.00057 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766362775470211072 |