Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea
European eel decline is now widely observed and involves a large number of factors such as overfishing, pollution, habitat loss, dam construction, river obstruction, parasitism and environmental changes. In the present study, we analysed the influence of environmental conditions in the Sargasso Sea...
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ftccsdartic:oai:HAL:ird-00549018v1 2023-05-15T13:27:19+02:00 Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea Bonhommeau, Sylvain Chassot, Emmanuel Rivot, Etienne Laboratoire d'Ecologie Halieutique - Agrocampus Ouest Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) 2008 https://hal.ird.fr/ird-00549018 https://hal.ird.fr/ird-00549018/document https://hal.ird.fr/ird-00549018/file/Bonhommeau_al-MS-revised1.pdf https://doi.org/10.1111/j.1365-2419.2007.00453.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2419.2007.00453.x ird-00549018 https://hal.ird.fr/ird-00549018 https://hal.ird.fr/ird-00549018/document https://hal.ird.fr/ird-00549018/file/Bonhommeau_al-MS-revised1.pdf doi:10.1111/j.1365-2419.2007.00453.x IRD: PAR00007362 PRODINRA: 175115 WOS: 000251738800003 info:eu-repo/semantics/OpenAccess ISSN: 1054-6006 EISSN: 1365-2419 Fisheries Oceanography https://hal.ird.fr/ird-00549018 Fisheries Oceanography, Wiley, 2008, 17 (1), pp.32-44. ⟨10.1111/j.1365-2419.2007.00453.x⟩ glass eel BATS Anguilla anguilla bottom-up primary production regime shift SST Sargasso Sea recruitment [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1111/j.1365-2419.2007.00453.x 2021-09-12T00:58:29Z European eel decline is now widely observed and involves a large number of factors such as overfishing, pollution, habitat loss, dam construction, river obstruction, parasitism and environmental changes. In the present study, we analysed the influence of environmental conditions in the Sargasso Sea and Atlantic ocean circulation on European glass eel recruitment success. Over a recent 11-year period, we showed a strong positive correlation between an original index of glass eel recruitment and primary production in eel spawning area. Moreover, primary production was negatively correlated with temperature in the Sargasso Sea. Therefore, we used sea temperature as an inverse proxy of marine production. A close negative relationship has been found over the last four decades between long-term fluctuations in recruitment and in sea temperature. These findings were reinforced by the detection of a regime shift in sea temperature that preceded the start of the decline in glass eel recruitment in the early 1980s. By contrast, variations in integrative indices measuring ocean circulation, i.e.\ latitude and strength of the Gulf Stream, did not seem to explain variations in glass eel recruitment. Our results support the hypothesis of a strong bottom-up control of leptocephali survival and growth by primary production in the Sargasso Sea on short and long time-scales. We argue that sea warming in the eel spawning area since the early 1980s has modified marine production and eventually affected the survival rate of European eels at early life stages. Article in Journal/Newspaper Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Fisheries Oceanography 17 1 32 44 |
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 |
glass eel BATS Anguilla anguilla bottom-up primary production regime shift SST Sargasso Sea recruitment [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
glass eel BATS Anguilla anguilla bottom-up primary production regime shift SST Sargasso Sea recruitment [SDE.BE]Environmental Sciences/Biodiversity and Ecology Bonhommeau, Sylvain Chassot, Emmanuel Rivot, Etienne Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea |
topic_facet |
glass eel BATS Anguilla anguilla bottom-up primary production regime shift SST Sargasso Sea recruitment [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
European eel decline is now widely observed and involves a large number of factors such as overfishing, pollution, habitat loss, dam construction, river obstruction, parasitism and environmental changes. In the present study, we analysed the influence of environmental conditions in the Sargasso Sea and Atlantic ocean circulation on European glass eel recruitment success. Over a recent 11-year period, we showed a strong positive correlation between an original index of glass eel recruitment and primary production in eel spawning area. Moreover, primary production was negatively correlated with temperature in the Sargasso Sea. Therefore, we used sea temperature as an inverse proxy of marine production. A close negative relationship has been found over the last four decades between long-term fluctuations in recruitment and in sea temperature. These findings were reinforced by the detection of a regime shift in sea temperature that preceded the start of the decline in glass eel recruitment in the early 1980s. By contrast, variations in integrative indices measuring ocean circulation, i.e.\ latitude and strength of the Gulf Stream, did not seem to explain variations in glass eel recruitment. Our results support the hypothesis of a strong bottom-up control of leptocephali survival and growth by primary production in the Sargasso Sea on short and long time-scales. We argue that sea warming in the eel spawning area since the early 1980s has modified marine production and eventually affected the survival rate of European eels at early life stages. |
author2 |
Laboratoire d'Ecologie Halieutique - Agrocampus Ouest Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
format |
Article in Journal/Newspaper |
author |
Bonhommeau, Sylvain Chassot, Emmanuel Rivot, Etienne |
author_facet |
Bonhommeau, Sylvain Chassot, Emmanuel Rivot, Etienne |
author_sort |
Bonhommeau, Sylvain |
title |
Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea |
title_short |
Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea |
title_full |
Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea |
title_fullStr |
Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea |
title_full_unstemmed |
Fluctuations in European eel (Anguilla anguilla) recruitment resulting from environmental changes in the Sargasso Sea |
title_sort |
fluctuations in european eel (anguilla anguilla) recruitment resulting from environmental changes in the sargasso sea |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.ird.fr/ird-00549018 https://hal.ird.fr/ird-00549018/document https://hal.ird.fr/ird-00549018/file/Bonhommeau_al-MS-revised1.pdf https://doi.org/10.1111/j.1365-2419.2007.00453.x |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 1054-6006 EISSN: 1365-2419 Fisheries Oceanography https://hal.ird.fr/ird-00549018 Fisheries Oceanography, Wiley, 2008, 17 (1), pp.32-44. ⟨10.1111/j.1365-2419.2007.00453.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2419.2007.00453.x ird-00549018 https://hal.ird.fr/ird-00549018 https://hal.ird.fr/ird-00549018/document https://hal.ird.fr/ird-00549018/file/Bonhommeau_al-MS-revised1.pdf doi:10.1111/j.1365-2419.2007.00453.x IRD: PAR00007362 PRODINRA: 175115 WOS: 000251738800003 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1365-2419.2007.00453.x |
container_title |
Fisheries Oceanography |
container_volume |
17 |
container_issue |
1 |
container_start_page |
32 |
op_container_end_page |
44 |
_version_ |
1766397664527646720 |