Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration
International audience Obstacles in rivers are considered to be one of the main threats to diadromous fish. As a result of the recent collapse of the European eel, the European Commission introduced a Regulation, requiring to reduce all sources of anthropogenic mortality, including those caused by p...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572/document https://hal.archives-ouvertes.fr/hal-01545572/file/bx2017-pub00054516.pdf https://doi.org/10.1051/alr/2017003 |
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ftccsdartic:oai:HAL:hal-01545572v1 2023-05-15T13:27:56+02:00 Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration Drouineau, Hilaire Bau, F. Alric, A. Deligne, N. Gomes, P. Sagnes, P. Ecosystèmes aquatiques et changements globaux (UR EABX) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Pôle Écohydraulique ONEMA-Irstea-INP 2017 https://hal.archives-ouvertes.fr/hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572/document https://hal.archives-ouvertes.fr/hal-01545572/file/bx2017-pub00054516.pdf https://doi.org/10.1051/alr/2017003 en eng HAL CCSD EDP Sciences info:eu-repo/semantics/altIdentifier/doi/10.1051/alr/2017003 hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572/document https://hal.archives-ouvertes.fr/hal-01545572/file/bx2017-pub00054516.pdf doi:10.1051/alr/2017003 IRSTEA: PUB00054516 info:eu-repo/semantics/OpenAccess ISSN: 0990-7440 EISSN: 1765-2952 Aquatic Living Resources https://hal.archives-ouvertes.fr/hal-01545572 Aquatic Living Resources, EDP Sciences, 2017, 30 (5), pp.5. ⟨10.1051/alr/2017003⟩ bayesian statistics OBSTACLE A LA MIGRATION MIGRATION ANGUILLA ANGUILLA STATISTIQUE BAYESIENNE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1051/alr/2017003 2021-09-12T00:28:43Z International audience Obstacles in rivers are considered to be one of the main threats to diadromous fish. As a result of the recent collapse of the European eel, the European Commission introduced a Regulation, requiring to reduce all sources of anthropogenic mortality, including those caused by passing through hydropower turbines. Improving knowledge about migration triggers and processes is crucial to assess and mitigate the impact of obstacles. In our study, we tracked 97 tagged silver eels in a fragmented river situated in the Western France (the River Dronne). Using the movement ecology framework, and implementing a Bayesian state-space model, we confirmed the influence of river discharge on migration triggering and the distance travelled by fish. We also demonstrated that, in our studied area, there is a small window of opportunity for migration. Moreover, we found that obstacles have a significant impact on distance travelled. Combined with the small window, this suggests that assessment of obstacles impact on downstream migration should not be limited to quantifying mortality at hydroelectric facilities, but should also consider the delay induced by obstacles, and its effects on escapement. The study also suggests that temporary turbines shutdown may mitigate the impacts of hydropower facilities in rivers with migration process similar to those observed here. Article in Journal/Newspaper Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Aquatic Living Resources 30 5 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
bayesian statistics OBSTACLE A LA MIGRATION MIGRATION ANGUILLA ANGUILLA STATISTIQUE BAYESIENNE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
bayesian statistics OBSTACLE A LA MIGRATION MIGRATION ANGUILLA ANGUILLA STATISTIQUE BAYESIENNE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment Drouineau, Hilaire Bau, F. Alric, A. Deligne, N. Gomes, P. Sagnes, P. Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration |
topic_facet |
bayesian statistics OBSTACLE A LA MIGRATION MIGRATION ANGUILLA ANGUILLA STATISTIQUE BAYESIENNE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Obstacles in rivers are considered to be one of the main threats to diadromous fish. As a result of the recent collapse of the European eel, the European Commission introduced a Regulation, requiring to reduce all sources of anthropogenic mortality, including those caused by passing through hydropower turbines. Improving knowledge about migration triggers and processes is crucial to assess and mitigate the impact of obstacles. In our study, we tracked 97 tagged silver eels in a fragmented river situated in the Western France (the River Dronne). Using the movement ecology framework, and implementing a Bayesian state-space model, we confirmed the influence of river discharge on migration triggering and the distance travelled by fish. We also demonstrated that, in our studied area, there is a small window of opportunity for migration. Moreover, we found that obstacles have a significant impact on distance travelled. Combined with the small window, this suggests that assessment of obstacles impact on downstream migration should not be limited to quantifying mortality at hydroelectric facilities, but should also consider the delay induced by obstacles, and its effects on escapement. The study also suggests that temporary turbines shutdown may mitigate the impacts of hydropower facilities in rivers with migration process similar to those observed here. |
author2 |
Ecosystèmes aquatiques et changements globaux (UR EABX) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Pôle Écohydraulique ONEMA-Irstea-INP |
format |
Article in Journal/Newspaper |
author |
Drouineau, Hilaire Bau, F. Alric, A. Deligne, N. Gomes, P. Sagnes, P. |
author_facet |
Drouineau, Hilaire Bau, F. Alric, A. Deligne, N. Gomes, P. Sagnes, P. |
author_sort |
Drouineau, Hilaire |
title |
Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration |
title_short |
Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration |
title_full |
Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration |
title_fullStr |
Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration |
title_full_unstemmed |
Silver eel downstream migration in fragmented rivers: use of a Bayesian model to track movements triggering and duration |
title_sort |
silver eel downstream migration in fragmented rivers: use of a bayesian model to track movements triggering and duration |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572/document https://hal.archives-ouvertes.fr/hal-01545572/file/bx2017-pub00054516.pdf https://doi.org/10.1051/alr/2017003 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 0990-7440 EISSN: 1765-2952 Aquatic Living Resources https://hal.archives-ouvertes.fr/hal-01545572 Aquatic Living Resources, EDP Sciences, 2017, 30 (5), pp.5. ⟨10.1051/alr/2017003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1051/alr/2017003 hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572 https://hal.archives-ouvertes.fr/hal-01545572/document https://hal.archives-ouvertes.fr/hal-01545572/file/bx2017-pub00054516.pdf doi:10.1051/alr/2017003 IRSTEA: PUB00054516 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1051/alr/2017003 |
container_title |
Aquatic Living Resources |
container_volume |
30 |
container_start_page |
5 |
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1766401227269079040 |