Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles
As is the case in many other countries, France's rivers are obstructed by tens of thousands of artificial weirs and dams. These structures disturb the fish population in many ways, particularly by modifying water quality and habitat. But above all they hinder their up and downstream circulation...
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Online Access: | https://hal.inrae.fr/tel-02591601 https://hal.inrae.fr/tel-02591601/document https://hal.inrae.fr/tel-02591601/file/pub00025830.pdf |
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ftccsdartic:oai:HAL:tel-02591601v1 2023-05-15T15:32:16+02:00 Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles Impact des seuils et barrages sur la migration anadrome du saumon atlantique (Salmo salar L.) : caractérisation et modélisation des processus de franchissement Croze, O. Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Doctorat Fonctionnement des Ecosystèmes et Agrosystèmes, Université de Toulouse 2008 https://hal.inrae.fr/tel-02591601 https://hal.inrae.fr/tel-02591601/document https://hal.inrae.fr/tel-02591601/file/pub00025830.pdf fr fre HAL CCSD tel-02591601 https://hal.inrae.fr/tel-02591601 https://hal.inrae.fr/tel-02591601/document https://hal.inrae.fr/tel-02591601/file/pub00025830.pdf IRSTEA: PUB00025830 info:eu-repo/semantics/OpenAccess https://hal.inrae.fr/tel-02591601 Sciences de l'environnement. Doctorat Fonctionnement des Ecosystèmes et Agrosystèmes, Université de Toulouse, 2008. Français thesis MONTAISON thèse [SDE]Environmental Sciences info:eu-repo/semantics/doctoralThesis Theses 2008 ftccsdartic 2020-12-24T05:54:28Z As is the case in many other countries, France's rivers are obstructed by tens of thousands of artificial weirs and dams. These structures disturb the fish population in many ways, particularly by modifying water quality and habitat. But above all they hinder their up and downstream circulation, with migratory species suffering the most. Over the last few decades, different types of fishway have been developed to reduce the impact of these obstacles. Their efficiency has only been evaluated more recently, however: the earliest results have proved rather disappointing, and have highlighted the need for progress in the field. To improve fish passage at these obstacles, including those which are already equipped with fishways, will require more knowledge of the factors that facilitate the passing of fish, and also the processes involved during passing. The Atlantic salmon, Salmo salar L., was selected as the biological model, because of its long migrations through inland waterways and the many obstacles it has to overcome. The approach followed by this thesis consisted in acquiring a large set of pass attempts occurring at a series of obstacles. Two rivers were used for this study, the Aulne, a small coastal river, and the Garonne, the third largest river in France by flow. These two rivers share the characteristic of being obstructed by a large number of weirs and dams of different kinds. Fish movements on the Aulne and the Garonne were tracked by telemetry (radio-tracking), the only technique able to identify upstream passes while monitoring fish behaviour during pass attempts. The first part of the study consisted in characterising the impact of the dams being studied. An analysis of each found that there was considerable variation between the sites in passage rates and delays to migration, and also between years for a given site. In both cases, the cumulative effect of the obstacles seems to be highly significant because they provide the principal factor for loss' during anadromous migration on both rivers. An ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
thesis MONTAISON thèse [SDE]Environmental Sciences |
spellingShingle |
thesis MONTAISON thèse [SDE]Environmental Sciences Croze, O. Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles |
topic_facet |
thesis MONTAISON thèse [SDE]Environmental Sciences |
description |
As is the case in many other countries, France's rivers are obstructed by tens of thousands of artificial weirs and dams. These structures disturb the fish population in many ways, particularly by modifying water quality and habitat. But above all they hinder their up and downstream circulation, with migratory species suffering the most. Over the last few decades, different types of fishway have been developed to reduce the impact of these obstacles. Their efficiency has only been evaluated more recently, however: the earliest results have proved rather disappointing, and have highlighted the need for progress in the field. To improve fish passage at these obstacles, including those which are already equipped with fishways, will require more knowledge of the factors that facilitate the passing of fish, and also the processes involved during passing. The Atlantic salmon, Salmo salar L., was selected as the biological model, because of its long migrations through inland waterways and the many obstacles it has to overcome. The approach followed by this thesis consisted in acquiring a large set of pass attempts occurring at a series of obstacles. Two rivers were used for this study, the Aulne, a small coastal river, and the Garonne, the third largest river in France by flow. These two rivers share the characteristic of being obstructed by a large number of weirs and dams of different kinds. Fish movements on the Aulne and the Garonne were tracked by telemetry (radio-tracking), the only technique able to identify upstream passes while monitoring fish behaviour during pass attempts. The first part of the study consisted in characterising the impact of the dams being studied. An analysis of each found that there was considerable variation between the sites in passage rates and delays to migration, and also between years for a given site. In both cases, the cumulative effect of the obstacles seems to be highly significant because they provide the principal factor for loss' during anadromous migration on both rivers. An ... |
author2 |
Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Doctorat Fonctionnement des Ecosystèmes et Agrosystèmes, Université de Toulouse |
format |
Doctoral or Postdoctoral Thesis |
author |
Croze, O. |
author_facet |
Croze, O. |
author_sort |
Croze, O. |
title |
Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles |
title_short |
Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles |
title_full |
Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles |
title_fullStr |
Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles |
title_full_unstemmed |
Impact of weirs and dams on the anadromous migration of the Atlantic salmon (Salmo salar L.): characterization and modelling of the processes for clearing obstacles |
title_sort |
impact of weirs and dams on the anadromous migration of the atlantic salmon (salmo salar l.): characterization and modelling of the processes for clearing obstacles |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.inrae.fr/tel-02591601 https://hal.inrae.fr/tel-02591601/document https://hal.inrae.fr/tel-02591601/file/pub00025830.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
https://hal.inrae.fr/tel-02591601 Sciences de l'environnement. Doctorat Fonctionnement des Ecosystèmes et Agrosystèmes, Université de Toulouse, 2008. Français |
op_relation |
tel-02591601 https://hal.inrae.fr/tel-02591601 https://hal.inrae.fr/tel-02591601/document https://hal.inrae.fr/tel-02591601/file/pub00025830.pdf IRSTEA: PUB00025830 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766362782365646848 |