Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices
The Atlantic salmon (Salmo salar) is as emblematic as in a global decline, as most of the diadromous fish species. Dams have direct consequences on the river ecological continuity and indirect effects, such as the modification of the hydrological and hydrosedimentary dynamics which affects these pop...
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ftunivnantes:oai:HAL:tel-01610747v1 2023-05-15T15:31:01+02:00 Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices Utilisation de deux outils hydroacoustiques pour analyser la dynamique migratoire du saumon atlantique (Salmo salar L.) dans deux fleuves de la baie du Mont-Saint-Michel Martignac, François Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Agrocampus Ouest Dominique Ombredane 2016-01-28 https://theses.hal.science/tel-01610747 https://theses.hal.science/tel-01610747/document https://theses.hal.science/tel-01610747/file/pdf2star-1507186154-Memoire_FMartignac.pdf fr fre HAL CCSD NNT: 2016NSARH097 tel-01610747 https://theses.hal.science/tel-01610747 https://theses.hal.science/tel-01610747/document https://theses.hal.science/tel-01610747/file/pdf2star-1507186154-Memoire_FMartignac.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01610747 Biodiversité et Ecologie. Agrocampus Ouest, 2016. Français. ⟨NNT : 2016NSARH097⟩ Migration dynamic Atlantic salmon hydroacoustic ecological continuity high-Frequency recording data technological innovation acoustic camera DIDSON Dynamique migratoire saumon atlantique hydroacoustique continuité écologique acquisitions haute fréquence innovation technologique caméra acoustique [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/doctoralThesis Theses 2016 ftunivnantes 2023-03-01T05:40:48Z The Atlantic salmon (Salmo salar) is as emblematic as in a global decline, as most of the diadromous fish species. Dams have direct consequences on the river ecological continuity and indirect effects, such as the modification of the hydrological and hydrosedimentary dynamics which affects these populations. In Normandy (France), the Couesnon River’s estuary flood-gate dam has recently been replaced by a new dam proceeding to water releases at low tide stall. This functioning may decrease the salmon abundance or disturb their migration dynamic on this river. To study the dam influence, a split-beam echosounder has been settled upstream the dam and has recorded Philippe BOëTpermanently the salmon migrations during the summer period from 2010 to 2014. The hydroacoustic methods, non-intrusive and independent from the turbidity conditions, provide useful information, neither available nor quantifiable with other existing monitoring technics. To evaluate the disturbance of the estuarine damthe migration dynamic of the same species has also been monitored on a nearby river, the Sélune River, whose estuary is free-flowing. The hydroacoustic tool settled on this river, a DIDSON, belongs to the acoustic camera generation and benefits from recent technological improvements. The defined methodologies highlight the advantages and limits of both tools, revealing the information gain brought by the acoustic cameras. A dam functioning influence on the Atlantic salmon migration has been revealed, but no negative impact has been described on the salmon annual recruitment level. This study Le saumon atlantique (Salmo salar) est une espèce tant emblématique que menacée à l’échelle internationale, au même titre que la plupart des espèces de poissons diadromes. La présence de barrages, en entraînant une rupture de la continuité écologique des cours d’eau, participe à ce déclin. Le remplacement du barrage en porte à flot sur l’estuaire du Couesnon (Normandie, France) par un barrage procédant à des lâchers d’eau à l’étale de basse ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Migration dynamic Atlantic salmon hydroacoustic ecological continuity high-Frequency recording data technological innovation acoustic camera DIDSON Dynamique migratoire saumon atlantique hydroacoustique continuité écologique acquisitions haute fréquence innovation technologique caméra acoustique [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Migration dynamic Atlantic salmon hydroacoustic ecological continuity high-Frequency recording data technological innovation acoustic camera DIDSON Dynamique migratoire saumon atlantique hydroacoustique continuité écologique acquisitions haute fréquence innovation technologique caméra acoustique [SDE.BE]Environmental Sciences/Biodiversity and Ecology Martignac, François Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices |
topic_facet |
Migration dynamic Atlantic salmon hydroacoustic ecological continuity high-Frequency recording data technological innovation acoustic camera DIDSON Dynamique migratoire saumon atlantique hydroacoustique continuité écologique acquisitions haute fréquence innovation technologique caméra acoustique [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
The Atlantic salmon (Salmo salar) is as emblematic as in a global decline, as most of the diadromous fish species. Dams have direct consequences on the river ecological continuity and indirect effects, such as the modification of the hydrological and hydrosedimentary dynamics which affects these populations. In Normandy (France), the Couesnon River’s estuary flood-gate dam has recently been replaced by a new dam proceeding to water releases at low tide stall. This functioning may decrease the salmon abundance or disturb their migration dynamic on this river. To study the dam influence, a split-beam echosounder has been settled upstream the dam and has recorded Philippe BOëTpermanently the salmon migrations during the summer period from 2010 to 2014. The hydroacoustic methods, non-intrusive and independent from the turbidity conditions, provide useful information, neither available nor quantifiable with other existing monitoring technics. To evaluate the disturbance of the estuarine damthe migration dynamic of the same species has also been monitored on a nearby river, the Sélune River, whose estuary is free-flowing. The hydroacoustic tool settled on this river, a DIDSON, belongs to the acoustic camera generation and benefits from recent technological improvements. The defined methodologies highlight the advantages and limits of both tools, revealing the information gain brought by the acoustic cameras. A dam functioning influence on the Atlantic salmon migration has been revealed, but no negative impact has been described on the salmon annual recruitment level. This study Le saumon atlantique (Salmo salar) est une espèce tant emblématique que menacée à l’échelle internationale, au même titre que la plupart des espèces de poissons diadromes. La présence de barrages, en entraînant une rupture de la continuité écologique des cours d’eau, participe à ce déclin. Le remplacement du barrage en porte à flot sur l’estuaire du Couesnon (Normandie, France) par un barrage procédant à des lâchers d’eau à l’étale de basse ... |
author2 |
Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Agrocampus Ouest Dominique Ombredane |
format |
Doctoral or Postdoctoral Thesis |
author |
Martignac, François |
author_facet |
Martignac, François |
author_sort |
Martignac, François |
title |
Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices |
title_short |
Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices |
title_full |
Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices |
title_fullStr |
Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices |
title_full_unstemmed |
Analysis of the Atlantic salmon migration dynamic (Salmo salar L.) on two rivers of the Mont-Saint-Michel Bay using hydroacoustic devices |
title_sort |
analysis of the atlantic salmon migration dynamic (salmo salar l.) on two rivers of the mont-saint-michel bay using hydroacoustic devices |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://theses.hal.science/tel-01610747 https://theses.hal.science/tel-01610747/document https://theses.hal.science/tel-01610747/file/pdf2star-1507186154-Memoire_FMartignac.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
https://theses.hal.science/tel-01610747 Biodiversité et Ecologie. Agrocampus Ouest, 2016. Français. ⟨NNT : 2016NSARH097⟩ |
op_relation |
NNT: 2016NSARH097 tel-01610747 https://theses.hal.science/tel-01610747 https://theses.hal.science/tel-01610747/document https://theses.hal.science/tel-01610747/file/pdf2star-1507186154-Memoire_FMartignac.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766361499954053120 |