The duration of migration of Atlantic Anguilla larvae
Oceanic larvae of the European (Anguilla anguilla) and American (A. rostrata) eels have to cross the Atlantic Ocean from the Sargasso Sea to European or North American coasts before entering continental habitats. In some European rivers, eel recruitment is now < 1% of levels in the 1980s. A bette...
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ftagrocampouest:oai:HAL:hal-00729630v1 2023-11-12T04:01:14+01:00 The duration of migration of Atlantic Anguilla larvae Bonhommeau, Sylvain Castonguay, Martin Rivot, Etienne Sabatié, Richard Le Pape, Olivier Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Pêches et Océans Canada, Institut Maurice-Lamontagne pêches et Océans Canada - Insitit Maurice Lamontagne Institut Maurice-Lamontagne-Institut Maurice-Lamontagne 2010 https://institut-agro-rennes-angers.hal.science/hal-00729630 https://institut-agro-rennes-angers.hal.science/hal-00729630/document https://institut-agro-rennes-angers.hal.science/hal-00729630/file/Bonhommeau_Sylvain.pdf https://doi.org/10.1111/j.1467-2979.2010.00362.x en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1467-2979.2010.00362.x hal-00729630 https://institut-agro-rennes-angers.hal.science/hal-00729630 https://institut-agro-rennes-angers.hal.science/hal-00729630/document https://institut-agro-rennes-angers.hal.science/hal-00729630/file/Bonhommeau_Sylvain.pdf doi:10.1111/j.1467-2979.2010.00362.x PRODINRA: 172622 WOS: 000280669800006 info:eu-repo/semantics/OpenAccess ISSN: 1467-2960 EISSN: 1467-2979 Fish and Fisheries https://institut-agro-rennes-angers.hal.science/hal-00729630 Fish and Fisheries, 2010, 11 (3), pp.289-306. ⟨10.1111/j.1467-2979.2010.00362.x⟩ Lagrangian modelling leptocephali North Atlantic otoliths Sargasso sea early-life-history european continental-shelf herring clupea-harengus daily growth increments young american eels japanese eel otolith microstructure north-atlantic sargasso sea glass eels [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/article Journal articles 2010 ftagrocampouest https://doi.org/10.1111/j.1467-2979.2010.00362.x 2023-10-24T20:59:54Z Oceanic larvae of the European (Anguilla anguilla) and American (A. rostrata) eels have to cross the Atlantic Ocean from the Sargasso Sea to European or North American coasts before entering continental habitats. In some European rivers, eel recruitment is now < 1% of levels in the 1980s. A better understanding of the effects of anthropogenic pressures and environmental fluctuations on eel larvae and subsequent recruitment is a prerequisite to build efficient management plans. The present paper provides insight into the critical oceanic phase of the eel life cycle with a focus on the duration of the larval migration whose estimates varies between 7 months and more than 2 years in both species. Does this range correspond to a natural variability in larval duration or does it stem from methodological artefacts? We first review the different methods used to estimate the duration of larval migration and critically describe their possible sources of misinterpretation. We then evaluate the consistency of these methods with the current knowledge about the ecology and physiology of eel larvae and the physical oceanography. While a moderate discrepancy in migration duration was found between methods for the American eel, the discrepancy was large in the European eel. In this species, otolith microstructure studies indicated migration durations between 7 and 9 months, while other methods pointed to durations of about 2 years. We show that estimates in favour of a long migration duration seem more robust to methodological caveats than methods estimating short durations of migration. Article in Journal/Newspaper Anguilla anguilla European eel North Atlantic Agrocampus Ouest: HAL Fish and Fisheries 11 3 289 306 |
institution |
Open Polar |
collection |
Agrocampus Ouest: HAL |
op_collection_id |
ftagrocampouest |
language |
English |
topic |
Lagrangian modelling leptocephali North Atlantic otoliths Sargasso sea early-life-history european continental-shelf herring clupea-harengus daily growth increments young american eels japanese eel otolith microstructure north-atlantic sargasso sea glass eels [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
Lagrangian modelling leptocephali North Atlantic otoliths Sargasso sea early-life-history european continental-shelf herring clupea-harengus daily growth increments young american eels japanese eel otolith microstructure north-atlantic sargasso sea glass eels [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Bonhommeau, Sylvain Castonguay, Martin Rivot, Etienne Sabatié, Richard Le Pape, Olivier The duration of migration of Atlantic Anguilla larvae |
topic_facet |
Lagrangian modelling leptocephali North Atlantic otoliths Sargasso sea early-life-history european continental-shelf herring clupea-harengus daily growth increments young american eels japanese eel otolith microstructure north-atlantic sargasso sea glass eels [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
Oceanic larvae of the European (Anguilla anguilla) and American (A. rostrata) eels have to cross the Atlantic Ocean from the Sargasso Sea to European or North American coasts before entering continental habitats. In some European rivers, eel recruitment is now < 1% of levels in the 1980s. A better understanding of the effects of anthropogenic pressures and environmental fluctuations on eel larvae and subsequent recruitment is a prerequisite to build efficient management plans. The present paper provides insight into the critical oceanic phase of the eel life cycle with a focus on the duration of the larval migration whose estimates varies between 7 months and more than 2 years in both species. Does this range correspond to a natural variability in larval duration or does it stem from methodological artefacts? We first review the different methods used to estimate the duration of larval migration and critically describe their possible sources of misinterpretation. We then evaluate the consistency of these methods with the current knowledge about the ecology and physiology of eel larvae and the physical oceanography. While a moderate discrepancy in migration duration was found between methods for the American eel, the discrepancy was large in the European eel. In this species, otolith microstructure studies indicated migration durations between 7 and 9 months, while other methods pointed to durations of about 2 years. We show that estimates in favour of a long migration duration seem more robust to methodological caveats than methods estimating short durations of migration. |
author2 |
Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Pêches et Océans Canada, Institut Maurice-Lamontagne pêches et Océans Canada - Insitit Maurice Lamontagne Institut Maurice-Lamontagne-Institut Maurice-Lamontagne |
format |
Article in Journal/Newspaper |
author |
Bonhommeau, Sylvain Castonguay, Martin Rivot, Etienne Sabatié, Richard Le Pape, Olivier |
author_facet |
Bonhommeau, Sylvain Castonguay, Martin Rivot, Etienne Sabatié, Richard Le Pape, Olivier |
author_sort |
Bonhommeau, Sylvain |
title |
The duration of migration of Atlantic Anguilla larvae |
title_short |
The duration of migration of Atlantic Anguilla larvae |
title_full |
The duration of migration of Atlantic Anguilla larvae |
title_fullStr |
The duration of migration of Atlantic Anguilla larvae |
title_full_unstemmed |
The duration of migration of Atlantic Anguilla larvae |
title_sort |
duration of migration of atlantic anguilla larvae |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://institut-agro-rennes-angers.hal.science/hal-00729630 https://institut-agro-rennes-angers.hal.science/hal-00729630/document https://institut-agro-rennes-angers.hal.science/hal-00729630/file/Bonhommeau_Sylvain.pdf https://doi.org/10.1111/j.1467-2979.2010.00362.x |
genre |
Anguilla anguilla European eel North Atlantic |
genre_facet |
Anguilla anguilla European eel North Atlantic |
op_source |
ISSN: 1467-2960 EISSN: 1467-2979 Fish and Fisheries https://institut-agro-rennes-angers.hal.science/hal-00729630 Fish and Fisheries, 2010, 11 (3), pp.289-306. ⟨10.1111/j.1467-2979.2010.00362.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1467-2979.2010.00362.x hal-00729630 https://institut-agro-rennes-angers.hal.science/hal-00729630 https://institut-agro-rennes-angers.hal.science/hal-00729630/document https://institut-agro-rennes-angers.hal.science/hal-00729630/file/Bonhommeau_Sylvain.pdf doi:10.1111/j.1467-2979.2010.00362.x PRODINRA: 172622 WOS: 000280669800006 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1467-2979.2010.00362.x |
container_title |
Fish and Fisheries |
container_volume |
11 |
container_issue |
3 |
container_start_page |
289 |
op_container_end_page |
306 |
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1782331729532420096 |