Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.)
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 isoto...
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2022
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Online Access: | https://archimer.ifremer.fr/doc/00783/89473/94968.pdf https://archimer.ifremer.fr/doc/00783/89473/94969.docx https://doi.org/10.1371/journal.pone.0270348 https://archimer.ifremer.fr/doc/00783/89473/ |
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ftarchimer:oai:archimer.ifremer.fr:89473 2023-05-15T13:27:30+02:00 Role of estuarine habitats for the feeding ecology of the European eel (Anguilla anguilla L.) Denis, Jeremy Rabhi, Khalef Le Loch, Francois Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-christine Amara, Rachid 2022 application/pdf https://archimer.ifremer.fr/doc/00783/89473/94968.pdf https://archimer.ifremer.fr/doc/00783/89473/94969.docx https://doi.org/10.1371/journal.pone.0270348 https://archimer.ifremer.fr/doc/00783/89473/ eng eng Public Library of Science (PLoS) https://archimer.ifremer.fr/doc/00783/89473/94968.pdf https://archimer.ifremer.fr/doc/00783/89473/94969.docx doi:10.1371/journal.pone.0270348 https://archimer.ifremer.fr/doc/00783/89473/ info:eu-repo/semantics/openAccess restricted use Plos One (1932-6203) (Public Library of Science (PLoS)), 2022 , Vol. 17 , N. 7 , P. e0270348 (23p.) text Publication info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1371/journal.pone.0270348 2022-08-23T22:50:27Z 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. δ15N and δ13C 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 δ13C 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 δ13C values showed significant enrichment from upper to lower along the estuaries while the δ15N values showed an inverse effect, with the lowest values in the lower part and highest in the upper part. Higher variability in δ13C 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. δ15N 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 Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) PLOS ONE 17 7 e0270348 |
institution |
Open Polar |
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Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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ftarchimer |
language |
English |
description |
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. δ15N and δ13C 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 δ13C 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 δ13C values showed significant enrichment from upper to lower along the estuaries while the δ15N values showed an inverse effect, with the lowest values in the lower part and highest in the upper part. Higher variability in δ13C 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. δ15N 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. |
format |
Article in Journal/Newspaper |
author |
Denis, Jeremy Rabhi, Khalef Le Loch, Francois Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-christine Amara, Rachid |
spellingShingle |
Denis, Jeremy Rabhi, Khalef Le Loch, Francois 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.) |
author_facet |
Denis, Jeremy Rabhi, Khalef Le Loch, Francois Ben Rais Lasram, Frida Boutin, Kévin Kazour, Maria Diop, Mamadou Gruselle, Marie-christine Amara, Rachid |
author_sort |
Denis, Jeremy |
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 |
Public Library of Science (PLoS) |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00783/89473/94968.pdf https://archimer.ifremer.fr/doc/00783/89473/94969.docx https://doi.org/10.1371/journal.pone.0270348 https://archimer.ifremer.fr/doc/00783/89473/ |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Plos One (1932-6203) (Public Library of Science (PLoS)), 2022 , Vol. 17 , N. 7 , P. e0270348 (23p.) |
op_relation |
https://archimer.ifremer.fr/doc/00783/89473/94968.pdf https://archimer.ifremer.fr/doc/00783/89473/94969.docx doi:10.1371/journal.pone.0270348 https://archimer.ifremer.fr/doc/00783/89473/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
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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