The indispensable amino acid requirements for maintenance in Atlantic salmon fry
Facing a lack of standardized method to determine indispensable (I) amino acid (AA) maintenance requirements for fish, this study focused on the impact of selected nutritional factors on these requirements in salmon fry, in particular, the effect of dietary dispensable (D) AA, the past nutritional h...
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ftunivlouvain:oai:dial.uclouvain.be:boreal:206397 2024-05-12T08:01:23+00:00 The indispensable amino acid requirements for maintenance in Atlantic salmon fry Abboudi, Tarik UCL - AGRO/BAPA - Département de biologie appliquée et des productions agricoles Rollin, Xavier Larondelle, Yvan 2006 https://hdl.handle.net/2078.1/206397 eng eng UCL boreal:206397 https://hdl.handle.net/2078.1/206397 info:eu-repo/semantics/restrictedAccess info:eu-repo/semantics/doctoralThesis 2006 ftunivlouvain 2024-04-17T16:51:47Z Facing a lack of standardized method to determine indispensable (I) amino acid (AA) maintenance requirements for fish, this study focused on the impact of selected nutritional factors on these requirements in salmon fry, in particular, the effect of dietary dispensable (D) AA, the past nutritional history and the way (and the form) in which the graded levels of the tested IAA are supplied to the fish. The framework for this study is a deductive factorial model. One of the major outputs of this research is the important role of DAA as a limiting factor under maintenance conditions. Their sparing effect on the IAA and their energetic role, allow the IAA released by protein breakdown to be used for re-synthesis. The overall balance of the AA supply, particularly DAA, must be considered for accurate measurements of IAA requirements for maintenance. The past nutritional history adaptation to a crystalline AA-rich diet affects the threonine (Thr) maintenance requirement estimation, but not the Thr retention efficiency and the Thr requirement for growth. The mechanisms involved in this phenomenon are unknown. However, our results highlight the necessity to standardize the diet composition, the feeding level and the duration of the adaptation period to crystalline-AA rich diet before any study on maintenance requirement is aimed. This research established that both graded supplementation technique and diet dilution procedure should be preferred to the feeding PF technique for the estimation of the IAA maintenance requirement for salmon fry. The Thr retention efficiency (76%) and the Thr maintenance requirement (7.3 mg/kgBW0.75/d) seemed to be independent of dietary protein level. We also highlighted the usefulness of the deletion method to determine simultaneously the N and Lys maintenance requirement (54 and 20 mg/kgBW0.75/d, respectively) and Lys pattern for both maintenance (6 g/16g N) and growth (15 g/16g N). The factorial model was discussed and was found to provide a promising tool for further research in IAA ... Doctoral or Postdoctoral Thesis Atlantic salmon DIAL@UCLouvain (Université catholique de Louvain) |
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Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
description |
Facing a lack of standardized method to determine indispensable (I) amino acid (AA) maintenance requirements for fish, this study focused on the impact of selected nutritional factors on these requirements in salmon fry, in particular, the effect of dietary dispensable (D) AA, the past nutritional history and the way (and the form) in which the graded levels of the tested IAA are supplied to the fish. The framework for this study is a deductive factorial model. One of the major outputs of this research is the important role of DAA as a limiting factor under maintenance conditions. Their sparing effect on the IAA and their energetic role, allow the IAA released by protein breakdown to be used for re-synthesis. The overall balance of the AA supply, particularly DAA, must be considered for accurate measurements of IAA requirements for maintenance. The past nutritional history adaptation to a crystalline AA-rich diet affects the threonine (Thr) maintenance requirement estimation, but not the Thr retention efficiency and the Thr requirement for growth. The mechanisms involved in this phenomenon are unknown. However, our results highlight the necessity to standardize the diet composition, the feeding level and the duration of the adaptation period to crystalline-AA rich diet before any study on maintenance requirement is aimed. This research established that both graded supplementation technique and diet dilution procedure should be preferred to the feeding PF technique for the estimation of the IAA maintenance requirement for salmon fry. The Thr retention efficiency (76%) and the Thr maintenance requirement (7.3 mg/kgBW0.75/d) seemed to be independent of dietary protein level. We also highlighted the usefulness of the deletion method to determine simultaneously the N and Lys maintenance requirement (54 and 20 mg/kgBW0.75/d, respectively) and Lys pattern for both maintenance (6 g/16g N) and growth (15 g/16g N). The factorial model was discussed and was found to provide a promising tool for further research in IAA ... |
author2 |
UCL - AGRO/BAPA - Département de biologie appliquée et des productions agricoles Rollin, Xavier Larondelle, Yvan |
format |
Doctoral or Postdoctoral Thesis |
author |
Abboudi, Tarik |
spellingShingle |
Abboudi, Tarik The indispensable amino acid requirements for maintenance in Atlantic salmon fry |
author_facet |
Abboudi, Tarik |
author_sort |
Abboudi, Tarik |
title |
The indispensable amino acid requirements for maintenance in Atlantic salmon fry |
title_short |
The indispensable amino acid requirements for maintenance in Atlantic salmon fry |
title_full |
The indispensable amino acid requirements for maintenance in Atlantic salmon fry |
title_fullStr |
The indispensable amino acid requirements for maintenance in Atlantic salmon fry |
title_full_unstemmed |
The indispensable amino acid requirements for maintenance in Atlantic salmon fry |
title_sort |
indispensable amino acid requirements for maintenance in atlantic salmon fry |
publisher |
UCL |
publishDate |
2006 |
url |
https://hdl.handle.net/2078.1/206397 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
boreal:206397 https://hdl.handle.net/2078.1/206397 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1798843522865954816 |