Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web
This project was conducted in the overall context of enhancing the natural salmon population of the River Allier and focused on growth performances of their juveniles and parr in a large temperate river. We focused on the development of juveniles Atlantic salmon released at fry stage into the wild a...
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HAL CCSD
2009
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Online Access: | https://tel.archives-ouvertes.fr/tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306/document https://tel.archives-ouvertes.fr/tel-00725306/file/2009CLF21950.pdf |
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ftccsdartic:oai:HAL:tel-00725306v1 2023-05-15T15:33:06+02:00 Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web Croissance et régime alimentaire des juvéniles de Saumon atlantique (Salmo salar L.) dans la rivière Allier Descroix, Aurélie Laboratoire Microorganismes : Génome et Environnement (LMGE) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)-Université d'Auvergne - Clermont-Ferrand I (UdA) Université Blaise Pascal - Clermont-Ferrand II Christian Desvilettes; Gilles Bourdier 2009-09-10 https://tel.archives-ouvertes.fr/tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306/document https://tel.archives-ouvertes.fr/tel-00725306/file/2009CLF21950.pdf fr fre HAL CCSD NNT: 2009CLF21950 tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306/document https://tel.archives-ouvertes.fr/tel-00725306/file/2009CLF21950.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-00725306 Biodiversité et Ecologie. Université Blaise Pascal - Clermont-Ferrand II, 2009. Français. ⟨NNT : 2009CLF21950⟩ Growth Diet Stream continuum Macroinvertebrates Organic matter Fatty acids Aquatic food web Salmo salar L Croissance Alimentation Continuum fluvial Macroinvertébrés Matière organique Acides gras Réseau trophique aquatique [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/doctoralThesis Theses 2009 ftccsdartic 2021-04-25T00:36:28Z This project was conducted in the overall context of enhancing the natural salmon population of the River Allier and focused on growth performances of their juveniles and parr in a large temperate river. We focused on the development of juveniles Atlantic salmon released at fry stage into the wild and we integrated them in the context of the food chain. Our work had several objectives: (i) conduct a detailed analysis of diet, growth and nutritional status of parr raised in a salmon farm, released and recaptured along the continuum of the River Allier, (ii) assess whether, due to different fatty acid composition (FA), macroinvertebrates could affect parr growth and their overwintering survival, (iii) determine, through an approach based on FA biomarkers, the origins of lipid compounds found in macroinvertebrates and specify the sources of carbon assimilated by them along the river continuum. Sampling took place from June 2006 to October 2006 at monthly intervals. Samples of salmon, macroinvertebrates and different sources of organic matter were collected in five riffles along the river continuum (rhithron-epipotamon). Significant variations in growth, condition factor and lipid accumulation have been observed in restocked parr along the upstream-downstream gradient. The transition zone of rhithron-epipotamon appeared to be of great interest for salmon growth because of favourable environmental (temperature and flow) and trophic (preys composition and abundance) parameters. The values recorded in these areas were close to those achieved by the hatchery-reared salmon. In addition, growth performances seemed to result from dietary inputs of polar lipids (PL) from Baetids and Simuliids preferentially consumed by salmon in these downstream riffles. In contrast, the rhithron areas mainly located in trout zone, can be considered as the extreme upstream limit for 0+ salmon restocking. The low growth and lipid storage observed in this area appeared to result from lower dietary inputs in PL compared to the other riffles, ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Growth Diet Stream continuum Macroinvertebrates Organic matter Fatty acids Aquatic food web Salmo salar L Croissance Alimentation Continuum fluvial Macroinvertébrés Matière organique Acides gras Réseau trophique aquatique [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Growth Diet Stream continuum Macroinvertebrates Organic matter Fatty acids Aquatic food web Salmo salar L Croissance Alimentation Continuum fluvial Macroinvertébrés Matière organique Acides gras Réseau trophique aquatique [SDE.BE]Environmental Sciences/Biodiversity and Ecology Descroix, Aurélie Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web |
topic_facet |
Growth Diet Stream continuum Macroinvertebrates Organic matter Fatty acids Aquatic food web Salmo salar L Croissance Alimentation Continuum fluvial Macroinvertébrés Matière organique Acides gras Réseau trophique aquatique [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
This project was conducted in the overall context of enhancing the natural salmon population of the River Allier and focused on growth performances of their juveniles and parr in a large temperate river. We focused on the development of juveniles Atlantic salmon released at fry stage into the wild and we integrated them in the context of the food chain. Our work had several objectives: (i) conduct a detailed analysis of diet, growth and nutritional status of parr raised in a salmon farm, released and recaptured along the continuum of the River Allier, (ii) assess whether, due to different fatty acid composition (FA), macroinvertebrates could affect parr growth and their overwintering survival, (iii) determine, through an approach based on FA biomarkers, the origins of lipid compounds found in macroinvertebrates and specify the sources of carbon assimilated by them along the river continuum. Sampling took place from June 2006 to October 2006 at monthly intervals. Samples of salmon, macroinvertebrates and different sources of organic matter were collected in five riffles along the river continuum (rhithron-epipotamon). Significant variations in growth, condition factor and lipid accumulation have been observed in restocked parr along the upstream-downstream gradient. The transition zone of rhithron-epipotamon appeared to be of great interest for salmon growth because of favourable environmental (temperature and flow) and trophic (preys composition and abundance) parameters. The values recorded in these areas were close to those achieved by the hatchery-reared salmon. In addition, growth performances seemed to result from dietary inputs of polar lipids (PL) from Baetids and Simuliids preferentially consumed by salmon in these downstream riffles. In contrast, the rhithron areas mainly located in trout zone, can be considered as the extreme upstream limit for 0+ salmon restocking. The low growth and lipid storage observed in this area appeared to result from lower dietary inputs in PL compared to the other riffles, ... |
author2 |
Laboratoire Microorganismes : Génome et Environnement (LMGE) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)-Université d'Auvergne - Clermont-Ferrand I (UdA) Université Blaise Pascal - Clermont-Ferrand II Christian Desvilettes; Gilles Bourdier |
format |
Doctoral or Postdoctoral Thesis |
author |
Descroix, Aurélie |
author_facet |
Descroix, Aurélie |
author_sort |
Descroix, Aurélie |
title |
Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web |
title_short |
Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web |
title_full |
Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web |
title_fullStr |
Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web |
title_full_unstemmed |
Growth and feeding of juveniles salmon (Salmo salar L.) in the river Allier : origin and transfers of fatty acids in the food-web |
title_sort |
growth and feeding of juveniles salmon (salmo salar l.) in the river allier : origin and transfers of fatty acids in the food-web |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://tel.archives-ouvertes.fr/tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306/document https://tel.archives-ouvertes.fr/tel-00725306/file/2009CLF21950.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
https://tel.archives-ouvertes.fr/tel-00725306 Biodiversité et Ecologie. Université Blaise Pascal - Clermont-Ferrand II, 2009. Français. ⟨NNT : 2009CLF21950⟩ |
op_relation |
NNT: 2009CLF21950 tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306 https://tel.archives-ouvertes.fr/tel-00725306/document https://tel.archives-ouvertes.fr/tel-00725306/file/2009CLF21950.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766363569325080576 |