Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets
In consideration of economical and environmental concerns, fish oil (FO) substitution in aquaculture is the focus of many fish nutritionists. The most stringent drawback of FO replacement in aquafeeds is the consequential modification to the final fatty acid (FA) make-up of the fish fillet.However,...
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ftdeakinunifig:oai:figshare.com:article/21046930 2023-05-15T18:10:00+02:00 Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets Giovanni Turchini David Francis 2009-07-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30020781 https://figshare.com/articles/journal_contribution/Fatty_acid_metabolism_desaturation_elongation_and_-oxidation_in_rainbow_trout_fed_fish_oil-_or_linseed_oil-based_diets/21046930 unknown http://hdl.handle.net/10536/DRO/DU:30020781 https://figshare.com/articles/journal_contribution/Fatty_acid_metabolism_desaturation_elongation_and_-oxidation_in_rainbow_trout_fed_fish_oil-_or_linseed_oil-based_diets/21046930 All Rights Reserved Uncategorized fatty acid metabolism fish oil replacement whole body fatty -acid -balance method Science & Technology Life Sciences & Biomedicine Nutrition & Dietetics Aquaculture Whole-body fatty-acid-balance method SALMO-SALAR L FRESH-WATER FISH VEGETABLE-OIL RAPESEED OIL MURRAY COD INTESTINAL ENTEROCYTES LIPID SOURCES WHOLE-BODY OLIVE OIL PALM OIL Text Journal contribution 2009 ftdeakinunifig 2022-11-17T22:47:31Z In consideration of economical and environmental concerns, fish oil (FO) substitution in aquaculture is the focus of many fish nutritionists. The most stringent drawback of FO replacement in aquafeeds is the consequential modification to the final fatty acid (FA) make-up of the fish fillet.However, it is envisaged that a solution may be achieved through a better understanding of fish FA metabolism. Therefore, the present study investigated the fate of individual dietary FA in rainbow trout (Oncorhynchus mykiss) fed a FO-based diet (rich in 20 : 5n-3) or a linseed oil-based diet (LO; rich in 18 : 3n-3). The study demonstrated that much of the 18 : 3n-3 content from the LO diet was oxidised and, despite the significantly increased accretion of D-6 and D-5 desaturated FA, a 2- and 3-fold reduction in the fish body content of 20 : 5n-3 and 22 : 6n-3, respectively, compared with the FO-fed fish, was recorded. The accretion of longer-chain FA was unaffected by the dietary treatments, while there was a greater net disappearance of FA provided in dietary surplus. SFA and MUFA recorded a net accretion of FA produced ex novo. In the fish fed the FO diet, the majority of dietary 20 : 5n-3 was accumulated (53·8 %), some was oxidised (14·7 %) and a large proportion (31·6 %) was elongated and desaturated up to 22 : 6n-3. In the fish fed the LO diet, the majority of dietary 18 : 3n-3 was accumulated (58·1 %), a large proportion was oxidised (29·5 %) and a limited amount (12·4 %) was bio-converted to longer and more unsaturated homologues. Other Non-Article Part of Journal/Newspaper Salmo salar DRO - Deakin Research Online |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Uncategorized fatty acid metabolism fish oil replacement whole body fatty -acid -balance method Science & Technology Life Sciences & Biomedicine Nutrition & Dietetics Aquaculture Whole-body fatty-acid-balance method SALMO-SALAR L FRESH-WATER FISH VEGETABLE-OIL RAPESEED OIL MURRAY COD INTESTINAL ENTEROCYTES LIPID SOURCES WHOLE-BODY OLIVE OIL PALM OIL |
spellingShingle |
Uncategorized fatty acid metabolism fish oil replacement whole body fatty -acid -balance method Science & Technology Life Sciences & Biomedicine Nutrition & Dietetics Aquaculture Whole-body fatty-acid-balance method SALMO-SALAR L FRESH-WATER FISH VEGETABLE-OIL RAPESEED OIL MURRAY COD INTESTINAL ENTEROCYTES LIPID SOURCES WHOLE-BODY OLIVE OIL PALM OIL Giovanni Turchini David Francis Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
topic_facet |
Uncategorized fatty acid metabolism fish oil replacement whole body fatty -acid -balance method Science & Technology Life Sciences & Biomedicine Nutrition & Dietetics Aquaculture Whole-body fatty-acid-balance method SALMO-SALAR L FRESH-WATER FISH VEGETABLE-OIL RAPESEED OIL MURRAY COD INTESTINAL ENTEROCYTES LIPID SOURCES WHOLE-BODY OLIVE OIL PALM OIL |
description |
In consideration of economical and environmental concerns, fish oil (FO) substitution in aquaculture is the focus of many fish nutritionists. The most stringent drawback of FO replacement in aquafeeds is the consequential modification to the final fatty acid (FA) make-up of the fish fillet.However, it is envisaged that a solution may be achieved through a better understanding of fish FA metabolism. Therefore, the present study investigated the fate of individual dietary FA in rainbow trout (Oncorhynchus mykiss) fed a FO-based diet (rich in 20 : 5n-3) or a linseed oil-based diet (LO; rich in 18 : 3n-3). The study demonstrated that much of the 18 : 3n-3 content from the LO diet was oxidised and, despite the significantly increased accretion of D-6 and D-5 desaturated FA, a 2- and 3-fold reduction in the fish body content of 20 : 5n-3 and 22 : 6n-3, respectively, compared with the FO-fed fish, was recorded. The accretion of longer-chain FA was unaffected by the dietary treatments, while there was a greater net disappearance of FA provided in dietary surplus. SFA and MUFA recorded a net accretion of FA produced ex novo. In the fish fed the FO diet, the majority of dietary 20 : 5n-3 was accumulated (53·8 %), some was oxidised (14·7 %) and a large proportion (31·6 %) was elongated and desaturated up to 22 : 6n-3. In the fish fed the LO diet, the majority of dietary 18 : 3n-3 was accumulated (58·1 %), a large proportion was oxidised (29·5 %) and a limited amount (12·4 %) was bio-converted to longer and more unsaturated homologues. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Giovanni Turchini David Francis |
author_facet |
Giovanni Turchini David Francis |
author_sort |
Giovanni Turchini |
title |
Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
title_short |
Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
title_full |
Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
title_fullStr |
Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
title_full_unstemmed |
Fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
title_sort |
fatty acid metabolism (desaturation, elongation and β-oxidation) in rainbow trout fed fish oil- or linseed oil-based diets |
publishDate |
2009 |
url |
http://hdl.handle.net/10536/DRO/DU:30020781 https://figshare.com/articles/journal_contribution/Fatty_acid_metabolism_desaturation_elongation_and_-oxidation_in_rainbow_trout_fed_fish_oil-_or_linseed_oil-based_diets/21046930 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30020781 https://figshare.com/articles/journal_contribution/Fatty_acid_metabolism_desaturation_elongation_and_-oxidation_in_rainbow_trout_fed_fish_oil-_or_linseed_oil-based_diets/21046930 |
op_rights |
All Rights Reserved |
_version_ |
1766182730703306752 |