Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon
The objective of the present study was to evaluate the effects of altered dietary n-3/n-6 LC-PUFA ratio, adaptation to diet over time, different water temperatures, and their interactions on nutrients and fatty acids digestibility in juvenile Atlantic salmon. Three experimental diets were formulated...
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ftdeakinunifig:oai:figshare.com:article/20918494 2024-06-23T07:51:19+00:00 Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon CT Huguet F Norambuena JA Emery K Hermon GM Turchini 2015-01-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30069907 https://figshare.com/articles/journal_contribution/Dietary_n-6_n-3_LC-PUFA_ratio_temperature_and_time_interactions_on_nutrients_and_fatty_acids_digestibility_in_Atlantic_salmon/20918494 unknown http://hdl.handle.net/10536/DRO/DU:30069907 https://figshare.com/articles/journal_contribution/Dietary_n-6_n-3_LC-PUFA_ratio_temperature_and_time_interactions_on_nutrients_and_fatty_acids_digestibility_in_Atlantic_salmon/20918494 All Rights Reserved Fisheries sciences not elsewhere classified Zoology not elsewhere classified Arachidonic acid Digestibility Eicosapentaenoic acid Long-chain polyunsaturated fatty acids Salmo salar Water temperature 070401 Aquaculture 830102 Aquaculture Fin Fish (excl. Tuna) DP1093570 School of Life and Environmental Sciences Centre for Chemistry and Biotechnology Text Journal contribution 2015 ftdeakinunifig 2024-06-06T02:05:01Z The objective of the present study was to evaluate the effects of altered dietary n-3/n-6 LC-PUFA ratio, adaptation to diet over time, different water temperatures, and their interactions on nutrients and fatty acids digestibility in juvenile Atlantic salmon. Three experimental diets were formulated to be identical, with the only exception of the ratio of eicosapentaenoic acid (EPA, 20:5n-3) to arachidonic acid (ARA, 20:4n-6), and fed to triplicate groups of juvenile Atlantic salmon (Salmo salar) of 55. g initial body weight. Fish were reared in a fully controlled recirculating aquaculture system, fed to apparent satiety twice daily and kept at 10. °C and for an initial period of 100. days, and faeces were collected for digestibility estimation. Then, half of the fish of each experimental tank were moved to a separate system, where the water temperature was gradually increased up to 20. °C. Fish were maintained in the two systems for an additional period of 50. days, and faeces were collected for digestibility estimation from both groups of fish at the two water temperatures. This study concluded that dietary treatments and time had only minor effects, whereas environmental temperature resulted in modified digestibility values, with increased nutrient digestibility with increasing temperature. Varying EPA/ARA ratio in the diet had only minor direct effects on digestibility, with no direct effect on overall nutrients digestibility, and fundamentally only statistically significant effects in the fatty acid digestibility of EPA and ARA themselves. Because of current increasing pressure for more efficient fish oil replacement strategies, increasing interest in dietary ARA in aquafeed and increasing relevance and occurrence of sub-optimal rearing temperature in commercial aquaculture, this study can be considered to be important as it provided a series of fundamental information, which are envisaged to be useful towards addressing these constraints and possible nutritional remedial strategies. Article in Journal/Newspaper Atlantic salmon Salmo salar DRO - Deakin Research Online |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Fisheries sciences not elsewhere classified Zoology not elsewhere classified Arachidonic acid Digestibility Eicosapentaenoic acid Long-chain polyunsaturated fatty acids Salmo salar Water temperature 070401 Aquaculture 830102 Aquaculture Fin Fish (excl. Tuna) DP1093570 School of Life and Environmental Sciences Centre for Chemistry and Biotechnology |
spellingShingle |
Fisheries sciences not elsewhere classified Zoology not elsewhere classified Arachidonic acid Digestibility Eicosapentaenoic acid Long-chain polyunsaturated fatty acids Salmo salar Water temperature 070401 Aquaculture 830102 Aquaculture Fin Fish (excl. Tuna) DP1093570 School of Life and Environmental Sciences Centre for Chemistry and Biotechnology CT Huguet F Norambuena JA Emery K Hermon GM Turchini Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon |
topic_facet |
Fisheries sciences not elsewhere classified Zoology not elsewhere classified Arachidonic acid Digestibility Eicosapentaenoic acid Long-chain polyunsaturated fatty acids Salmo salar Water temperature 070401 Aquaculture 830102 Aquaculture Fin Fish (excl. Tuna) DP1093570 School of Life and Environmental Sciences Centre for Chemistry and Biotechnology |
description |
The objective of the present study was to evaluate the effects of altered dietary n-3/n-6 LC-PUFA ratio, adaptation to diet over time, different water temperatures, and their interactions on nutrients and fatty acids digestibility in juvenile Atlantic salmon. Three experimental diets were formulated to be identical, with the only exception of the ratio of eicosapentaenoic acid (EPA, 20:5n-3) to arachidonic acid (ARA, 20:4n-6), and fed to triplicate groups of juvenile Atlantic salmon (Salmo salar) of 55. g initial body weight. Fish were reared in a fully controlled recirculating aquaculture system, fed to apparent satiety twice daily and kept at 10. °C and for an initial period of 100. days, and faeces were collected for digestibility estimation. Then, half of the fish of each experimental tank were moved to a separate system, where the water temperature was gradually increased up to 20. °C. Fish were maintained in the two systems for an additional period of 50. days, and faeces were collected for digestibility estimation from both groups of fish at the two water temperatures. This study concluded that dietary treatments and time had only minor effects, whereas environmental temperature resulted in modified digestibility values, with increased nutrient digestibility with increasing temperature. Varying EPA/ARA ratio in the diet had only minor direct effects on digestibility, with no direct effect on overall nutrients digestibility, and fundamentally only statistically significant effects in the fatty acid digestibility of EPA and ARA themselves. Because of current increasing pressure for more efficient fish oil replacement strategies, increasing interest in dietary ARA in aquafeed and increasing relevance and occurrence of sub-optimal rearing temperature in commercial aquaculture, this study can be considered to be important as it provided a series of fundamental information, which are envisaged to be useful towards addressing these constraints and possible nutritional remedial strategies. |
format |
Article in Journal/Newspaper |
author |
CT Huguet F Norambuena JA Emery K Hermon GM Turchini |
author_facet |
CT Huguet F Norambuena JA Emery K Hermon GM Turchini |
author_sort |
CT Huguet |
title |
Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon |
title_short |
Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon |
title_full |
Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon |
title_fullStr |
Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon |
title_full_unstemmed |
Dietary n-6/n-3 LC-PUFA ratio, temperature and time interactions on nutrients and fatty acids digestibility in Atlantic salmon |
title_sort |
dietary n-6/n-3 lc-pufa ratio, temperature and time interactions on nutrients and fatty acids digestibility in atlantic salmon |
publishDate |
2015 |
url |
http://hdl.handle.net/10536/DRO/DU:30069907 https://figshare.com/articles/journal_contribution/Dietary_n-6_n-3_LC-PUFA_ratio_temperature_and_time_interactions_on_nutrients_and_fatty_acids_digestibility_in_Atlantic_salmon/20918494 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30069907 https://figshare.com/articles/journal_contribution/Dietary_n-6_n-3_LC-PUFA_ratio_temperature_and_time_interactions_on_nutrients_and_fatty_acids_digestibility_in_Atlantic_salmon/20918494 |
op_rights |
All Rights Reserved |
_version_ |
1802642371385491456 |