Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. )
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, wit...
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Other Authors: | , , , , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2008
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Subjects: | |
Online Access: | https://hal.science/tel-04465242 https://hal.science/tel-04465242/document https://hal.science/tel-04465242/file/Croze.pdf |
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ftutoulouse3hal:oai:HAL:tel-04465242v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
French |
topic |
obstacles fishways passability diadromous fish Salmo salar radio tracking upstream migration modelling Passes à poissons Franchissabilité Migrateurs Radiopistage Montaison Modélisation [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
obstacles fishways passability diadromous fish Salmo salar radio tracking upstream migration modelling Passes à poissons Franchissabilité Migrateurs Radiopistage Montaison Modélisation [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Croze, Olivier Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) |
topic_facet |
obstacles fishways passability diadromous fish Salmo salar radio tracking upstream migration modelling Passes à poissons Franchissabilité Migrateurs Radiopistage Montaison Modélisation [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
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 |
Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université de Toulouse (UT) Institut National Polytechnique (Toulouse) Pierre Elie Puy Lim |
format |
Doctoral or Postdoctoral Thesis |
author |
Croze, Olivier |
author_facet |
Croze, Olivier |
author_sort |
Croze, Olivier |
title |
Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) |
title_short |
Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) |
title_full |
Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) |
title_fullStr |
Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) |
title_full_unstemmed |
Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) |
title_sort |
impact of dams and weirs on the anadromous migration of the atlantic salmon (salmo salar l. ) |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/tel-04465242 https://hal.science/tel-04465242/document https://hal.science/tel-04465242/file/Croze.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
https://hal.science/tel-04465242 Ecosystèmes. Institut National Polytechnique (Toulouse), 2008. Français. ⟨NNT : 2008INPT029A⟩ |
op_relation |
NNT: 2008INPT029A tel-04465242 https://hal.science/tel-04465242 https://hal.science/tel-04465242/document https://hal.science/tel-04465242/file/Croze.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1810432470517022720 |
spelling |
ftutoulouse3hal:oai:HAL:tel-04465242v1 2024-09-15T17:56:16+00:00 Impact of dams and weirs on the anadromous migration of the Atlantic salmon (Salmo salar L. ) Impact des seuils et barrages sur la migration anadrome du saumon atlantique (Salmo salar L. ) Impact of dams and weirs 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, Olivier Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université de Toulouse (UT) Institut National Polytechnique (Toulouse) Pierre Elie Puy Lim 2008-11-14 https://hal.science/tel-04465242 https://hal.science/tel-04465242/document https://hal.science/tel-04465242/file/Croze.pdf fr fre HAL CCSD NNT: 2008INPT029A tel-04465242 https://hal.science/tel-04465242 https://hal.science/tel-04465242/document https://hal.science/tel-04465242/file/Croze.pdf info:eu-repo/semantics/OpenAccess https://hal.science/tel-04465242 Ecosystèmes. Institut National Polytechnique (Toulouse), 2008. Français. ⟨NNT : 2008INPT029A⟩ obstacles fishways passability diadromous fish Salmo salar radio tracking upstream migration modelling Passes à poissons Franchissabilité Migrateurs Radiopistage Montaison Modélisation [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/doctoralThesis Theses 2008 ftutoulouse3hal 2024-06-25T00:03:52Z 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 Université Toulouse III - Paul Sabatier: HAL-UPS |