Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.)
International audience This study aims to characterize and compare the feeding ecology of the European eels ( Anguilla anguilla L.) during the continental phase (i.e. yellow and silver) along a salinity gradient (i.e. lower, middle and upper) in six northern France estuaries (i.e. brackish water). T...
Published in: | PLOS ONE |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Subjects: | |
Online Access: | https://ulco.hal.science/hal-03716404 https://ulco.hal.science/hal-03716404/document https://ulco.hal.science/hal-03716404/file/journal.pone.0270348.pdf https://doi.org/10.1371/journal.pone.0270348 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology Denis, Jérémy Rabhi, Khalef Le Loc’h, François Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-Christine Amara, Rachid Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience This study aims to characterize and compare the feeding ecology of the European eels ( Anguilla anguilla L.) during the continental phase (i.e. yellow and silver) along a salinity gradient (i.e. lower, middle and upper) in six northern France estuaries (i.e. brackish water). The diet and stable isotopic (i.e. δ 15 N and δ 13 C values) compositions of eels collected with a fyke net in six estuaries (Slack, Wimereux, Liane, Canche, Authie and Somme estuaries) located along the French coast of the eastern English Channel per season over a year were described by combining gut content and stable isotope analyses. Eel guts were dominated by typical BW prey, Malacostraca and Actinopterygii (54% and 40%, respectively), with the gammare Gammarus zaddachi and the green crab Carcinus maenas (38% and 14%, respectively), and smaller yellow eels of A . anguilla and juvenile European flounder, Platichthys flesus (19% and 14%, respectively) being the most frequently found in their guts. The δ 13 C values of a majority of eels confirmed the sea- and brackish water-specific carbon resources. Dietary and isotopic niche revealed no clear change between total length, silvering stages and seasons, but a significant difference between salinity gradients and estuaries. Eels δ 13 C values showed significant enrichment from upper to lower along the estuaries while the δ 15 N values showed an inverse effect, with the lowest values in the lower part and highest in the upper part. Higher variability in δ 13 C values in larger estuaries suggested that eels feed on a wide range of food sources than in smaller estuaries. While eels in the smaller estuaries fed mainly on Actinopterygii prey, eels in the larger ones had a lower trophic level (i.e. δ 15 N values) and fed mainly on Malacostraca prey. This spatial difference in dietary and isotopic niche is discussed in relation to biological structure of eel and environmental variables. |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Université du Littoral Côte d'Opale (ULCO) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Parc Naturel Marins des Estuaires Picards et de la Mer d’Opale (DECISION N ̊2018-28 09/03/2018) Région Hauts de France (PFEA621220CR0310022) European Project: PFEA621220CR0310022 |
format |
Article in Journal/Newspaper |
author |
Denis, Jérémy Rabhi, Khalef Le Loc’h, François Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-Christine Amara, Rachid |
author_facet |
Denis, Jérémy Rabhi, Khalef Le Loc’h, François Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-Christine Amara, Rachid |
author_sort |
Denis, Jérémy |
title |
Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) |
title_short |
Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) |
title_full |
Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) |
title_fullStr |
Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) |
title_full_unstemmed |
Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) |
title_sort |
role of estuarine habitats for the feeding ecology of the european eel (anguilla anguilla l.) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://ulco.hal.science/hal-03716404 https://ulco.hal.science/hal-03716404/document https://ulco.hal.science/hal-03716404/file/journal.pone.0270348.pdf https://doi.org/10.1371/journal.pone.0270348 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://ulco.hal.science/hal-03716404 PLoS ONE, 2022, 17 (7), pp.e0270348. ⟨10.1371/journal.pone.0270348⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0270348 info:eu-repo/grantAgreement//PFEA621220CR0310022/EU/European Maritime Fisheries Fund/ hal-03716404 https://ulco.hal.science/hal-03716404 https://ulco.hal.science/hal-03716404/document https://ulco.hal.science/hal-03716404/file/journal.pone.0270348.pdf doi:10.1371/journal.pone.0270348 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0270348 |
container_title |
PLOS ONE |
container_volume |
17 |
container_issue |
7 |
container_start_page |
e0270348 |
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1792043359492112384 |
spelling |
ftccsdartic:oai:HAL:hal-03716404v1 2024-02-27T08:33:01+00:00 Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) Denis, Jérémy Rabhi, Khalef Le Loc’h, François Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-Christine Amara, Rachid Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Université du Littoral Côte d'Opale (ULCO) Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Parc Naturel Marins des Estuaires Picards et de la Mer d’Opale (DECISION N ̊2018-28 09/03/2018) Région Hauts de France (PFEA621220CR0310022) European Project: PFEA621220CR0310022 2022-07-06 https://ulco.hal.science/hal-03716404 https://ulco.hal.science/hal-03716404/document https://ulco.hal.science/hal-03716404/file/journal.pone.0270348.pdf https://doi.org/10.1371/journal.pone.0270348 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0270348 info:eu-repo/grantAgreement//PFEA621220CR0310022/EU/European Maritime Fisheries Fund/ hal-03716404 https://ulco.hal.science/hal-03716404 https://ulco.hal.science/hal-03716404/document https://ulco.hal.science/hal-03716404/file/journal.pone.0270348.pdf doi:10.1371/journal.pone.0270348 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://ulco.hal.science/hal-03716404 PLoS ONE, 2022, 17 (7), pp.e0270348. ⟨10.1371/journal.pone.0270348⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.1371/journal.pone.0270348 2024-01-28T00:51:13Z International audience This study aims to characterize and compare the feeding ecology of the European eels ( Anguilla anguilla L.) during the continental phase (i.e. yellow and silver) along a salinity gradient (i.e. lower, middle and upper) in six northern France estuaries (i.e. brackish water). The diet and stable isotopic (i.e. δ 15 N and δ 13 C values) compositions of eels collected with a fyke net in six estuaries (Slack, Wimereux, Liane, Canche, Authie and Somme estuaries) located along the French coast of the eastern English Channel per season over a year were described by combining gut content and stable isotope analyses. Eel guts were dominated by typical BW prey, Malacostraca and Actinopterygii (54% and 40%, respectively), with the gammare Gammarus zaddachi and the green crab Carcinus maenas (38% and 14%, respectively), and smaller yellow eels of A . anguilla and juvenile European flounder, Platichthys flesus (19% and 14%, respectively) being the most frequently found in their guts. The δ 13 C values of a majority of eels confirmed the sea- and brackish water-specific carbon resources. Dietary and isotopic niche revealed no clear change between total length, silvering stages and seasons, but a significant difference between salinity gradients and estuaries. Eels δ 13 C values showed significant enrichment from upper to lower along the estuaries while the δ 15 N values showed an inverse effect, with the lowest values in the lower part and highest in the upper part. Higher variability in δ 13 C values in larger estuaries suggested that eels feed on a wide range of food sources than in smaller estuaries. While eels in the smaller estuaries fed mainly on Actinopterygii prey, eels in the larger ones had a lower trophic level (i.e. δ 15 N values) and fed mainly on Malacostraca prey. This spatial difference in dietary and isotopic niche is discussed in relation to biological structure of eel and environmental variables. Article in Journal/Newspaper Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) PLOS ONE 17 7 e0270348 |