Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France
International audience The influence of environmental factors (mainly the river flow) on the year-to-year variability of European eel Anguilla anguilla fluvial recruitment in a small coastal catchment, the Frémur River (north-west France) was examined. A comprehensive survey of catches from fixed tr...
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Online Access: | https://hal.science/hal-00450697 https://doi.org/10.1111/j.1095-8649.2009.02288.x |
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ftunivrennes1hal:oai:HAL:hal-00450697v1 2024-04-28T07:55:07+00:00 Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France Acou, Anthony Legault, A. Laffaille, P. Feunteun, Eric Biologie des organismes marins et écosystèmes (BOME) Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Centre De Recherche et d'Enseignement sur les Systèmes Côtiers (CRESCO) Muséum national d'Histoire naturelle (MNHN)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Biodiversité et gestion des territoires EA 7316 Fish Pass 2009 https://hal.science/hal-00450697 https://doi.org/10.1111/j.1095-8649.2009.02288.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1095-8649.2009.02288.x hal-00450697 https://hal.science/hal-00450697 doi:10.1111/j.1095-8649.2009.02288.x ISSN: 0022-1112 EISSN: 1095-8649 Journal of Fish Biology https://hal.science/hal-00450697 Journal of Fish Biology, 2009, 74 (9), pp.1985 - 2001. ⟨10.1111/j.1095-8649.2009.02288.x⟩ habitat saturation river flow river recruitment year-to-year variability [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2009 ftunivrennes1hal https://doi.org/10.1111/j.1095-8649.2009.02288.x 2024-04-04T17:01:15Z International audience The influence of environmental factors (mainly the river flow) on the year-to-year variability of European eel Anguilla anguilla fluvial recruitment in a small coastal catchment, the Frémur River (north-west France) was examined. A comprehensive survey of catches from fixed traps at two weirs located at 4·5 km (Pont es Omnes Dam) and 6·0 km (Bois Joli Dam) above the river mouth was carried out between 1997 and 2004. Young pigmented elvers (mean ±s.d. total length, 133·7 ± 29·6 mm) were recruited in eel-passes from February to October, but the main runs followed a modal curve from April to September with a peak centred in May to June. Catches varied greatly between years, from 381 to 26 765 elvers. For each trap, a positive linear relationship between monthly mean river flow that preceded the maximal intensity of captures and annual total catches was observed. These relationships explained 73·1% (P < 0.01) and 89·0% (P < 0.001) of the year-to-year variability of the recruitment observed in the Pont es Omnes and Bois Joli traps respectively. A significant increase in river flow at the beginning of the migration peak would thus trigger a greater proportion of A. anguilla settled in the estuary and in the downstream zone of the Fremur River to begin their freshwater colonization. The physicochemical roles of changes in river discharge in stimulating upstream migration are discussed. It is concluded that fluvial recruitment in the Fremur River is mainly determined by environmental factors Article in Journal/Newspaper Anguilla anguilla Université de Rennes 1: Publications scientifiques (HAL) Journal of Fish Biology 74 9 1985 2001 |
institution |
Open Polar |
collection |
Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
habitat saturation river flow river recruitment year-to-year variability [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
habitat saturation river flow river recruitment year-to-year variability [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment Acou, Anthony Legault, A. Laffaille, P. Feunteun, Eric Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France |
topic_facet |
habitat saturation river flow river recruitment year-to-year variability [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience The influence of environmental factors (mainly the river flow) on the year-to-year variability of European eel Anguilla anguilla fluvial recruitment in a small coastal catchment, the Frémur River (north-west France) was examined. A comprehensive survey of catches from fixed traps at two weirs located at 4·5 km (Pont es Omnes Dam) and 6·0 km (Bois Joli Dam) above the river mouth was carried out between 1997 and 2004. Young pigmented elvers (mean ±s.d. total length, 133·7 ± 29·6 mm) were recruited in eel-passes from February to October, but the main runs followed a modal curve from April to September with a peak centred in May to June. Catches varied greatly between years, from 381 to 26 765 elvers. For each trap, a positive linear relationship between monthly mean river flow that preceded the maximal intensity of captures and annual total catches was observed. These relationships explained 73·1% (P < 0.01) and 89·0% (P < 0.001) of the year-to-year variability of the recruitment observed in the Pont es Omnes and Bois Joli traps respectively. A significant increase in river flow at the beginning of the migration peak would thus trigger a greater proportion of A. anguilla settled in the estuary and in the downstream zone of the Fremur River to begin their freshwater colonization. The physicochemical roles of changes in river discharge in stimulating upstream migration are discussed. It is concluded that fluvial recruitment in the Fremur River is mainly determined by environmental factors |
author2 |
Biologie des organismes marins et écosystèmes (BOME) Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Centre De Recherche et d'Enseignement sur les Systèmes Côtiers (CRESCO) Muséum national d'Histoire naturelle (MNHN)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Biodiversité et gestion des territoires EA 7316 Fish Pass |
format |
Article in Journal/Newspaper |
author |
Acou, Anthony Legault, A. Laffaille, P. Feunteun, Eric |
author_facet |
Acou, Anthony Legault, A. Laffaille, P. Feunteun, Eric |
author_sort |
Acou, Anthony |
title |
Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France |
title_short |
Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France |
title_full |
Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France |
title_fullStr |
Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France |
title_full_unstemmed |
Environmental determinism of year-to-year recruitment variability of European eel Anguilla anguilla in a small coastal catchment, the Fremur, north-west France |
title_sort |
environmental determinism of year-to-year recruitment variability of european eel anguilla anguilla in a small coastal catchment, the fremur, north-west france |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-00450697 https://doi.org/10.1111/j.1095-8649.2009.02288.x |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 0022-1112 EISSN: 1095-8649 Journal of Fish Biology https://hal.science/hal-00450697 Journal of Fish Biology, 2009, 74 (9), pp.1985 - 2001. ⟨10.1111/j.1095-8649.2009.02288.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1095-8649.2009.02288.x hal-00450697 https://hal.science/hal-00450697 doi:10.1111/j.1095-8649.2009.02288.x |
op_doi |
https://doi.org/10.1111/j.1095-8649.2009.02288.x |
container_title |
Journal of Fish Biology |
container_volume |
74 |
container_issue |
9 |
container_start_page |
1985 |
op_container_end_page |
2001 |
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1797578546979274752 |