The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries
International audience The aim of this study was to investigate the influence of environmental characteristics and anthropogenic pressures on the abundance of estuarine European eels (Anguilla anguilla L.) during their continental growth phase. European eels were collected with fyke nets from spring...
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2024
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Online Access: | https://hal.science/hal-04523322 https://hal.science/hal-04523322/document https://hal.science/hal-04523322/file/fishes-09-00044.pdf https://doi.org/10.3390/fishes9020044 |
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ftofficefbiodive:oai:HAL:hal-04523322v1 2024-06-23T07:45:34+00:00 The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries Denis, Jérémy Lepage, Mario 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) Ecosystèmes aquatiques et changements globaux (UR EABX) Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Parc naturel marin de l’Estuaire de la Gironde et de la Mer des Pertuis (PNM Estuaire de la Gironde et Mer de Pertuis) Office français de la biodiversité (OFB) 2024-01-23 https://hal.science/hal-04523322 https://hal.science/hal-04523322/document https://hal.science/hal-04523322/file/fishes-09-00044.pdf https://doi.org/10.3390/fishes9020044 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/fishes9020044 hal-04523322 https://hal.science/hal-04523322 https://hal.science/hal-04523322/document https://hal.science/hal-04523322/file/fishes-09-00044.pdf doi:10.3390/fishes9020044 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2410-3888 Fishes https://hal.science/hal-04523322 Fishes, 2024, 9 (2), pp.44. ⟨10.3390/fishes9020044⟩ [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2024 ftofficefbiodive https://doi.org/10.3390/fishes9020044 2024-06-05T23:30:57Z International audience The aim of this study was to investigate the influence of environmental characteristics and anthropogenic pressures on the abundance of estuarine European eels (Anguilla anguilla L.) during their continental growth phase. European eels were collected with fyke nets from spring to autumn in twenty-nine estuaries along the French English Channel and the Atlantic coast. Eel abundance (catch per unit effort, CPUE) was assessed for all eels and by size class for small (total length < 300 mm), intermediate (≥300 to <450 mm), and large (≥450 mm) eels. The environmental characteristics of the French estuaries were described by twelve descriptor variables, mainly related to hydro-morphological and sedimentary factors. Based on principal component analysis and hierarchical clustering analysis, estuary size was identified as the main explanatory variable and used to compare eel abundance. Eel abundance differed significantly according to estuary size, with higher abundances observed in small estuaries (7.22 to 13.00 ind. fyke nets 24 h−1) compared to large estuaries (0.13 to 0.71 ind. fyke nets 24 h−1). Spatial variation in eel abundance was correlated with differences in estuary size for all eel size classes. The influence of anthropogenic pressures on eel abundance was assessed by nine anthropogenic estuarine pressure indicators. The results indicate that high values of the anthropogenic pressure indicators were correlated with low eel abundance. This study highlights that large French estuaries subject to stronger anthropogenic pressures were less favourable habitats than small estuaries with less anthropogenic pressure. Article in Journal/Newspaper Anguilla anguilla Portail HAL OFB (Office français de la biodiversité) Fishes 9 2 44 |
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Open Polar |
collection |
Portail HAL OFB (Office français de la biodiversité) |
op_collection_id |
ftofficefbiodive |
language |
English |
topic |
[SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
[SDV.EE]Life Sciences [q-bio]/Ecology environment Denis, Jérémy Lepage, Mario Gruselle, Marie-Christine Amara, Rachid The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries |
topic_facet |
[SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience The aim of this study was to investigate the influence of environmental characteristics and anthropogenic pressures on the abundance of estuarine European eels (Anguilla anguilla L.) during their continental growth phase. European eels were collected with fyke nets from spring to autumn in twenty-nine estuaries along the French English Channel and the Atlantic coast. Eel abundance (catch per unit effort, CPUE) was assessed for all eels and by size class for small (total length < 300 mm), intermediate (≥300 to <450 mm), and large (≥450 mm) eels. The environmental characteristics of the French estuaries were described by twelve descriptor variables, mainly related to hydro-morphological and sedimentary factors. Based on principal component analysis and hierarchical clustering analysis, estuary size was identified as the main explanatory variable and used to compare eel abundance. Eel abundance differed significantly according to estuary size, with higher abundances observed in small estuaries (7.22 to 13.00 ind. fyke nets 24 h−1) compared to large estuaries (0.13 to 0.71 ind. fyke nets 24 h−1). Spatial variation in eel abundance was correlated with differences in estuary size for all eel size classes. The influence of anthropogenic pressures on eel abundance was assessed by nine anthropogenic estuarine pressure indicators. The results indicate that high values of the anthropogenic pressure indicators were correlated with low eel abundance. This study highlights that large French estuaries subject to stronger anthropogenic pressures were less favourable habitats than small estuaries with less anthropogenic pressure. |
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) Ecosystèmes aquatiques et changements globaux (UR EABX) Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Parc naturel marin de l’Estuaire de la Gironde et de la Mer des Pertuis (PNM Estuaire de la Gironde et Mer de Pertuis) Office français de la biodiversité (OFB) |
format |
Article in Journal/Newspaper |
author |
Denis, Jérémy Lepage, Mario Gruselle, Marie-Christine Amara, Rachid |
author_facet |
Denis, Jérémy Lepage, Mario Gruselle, Marie-Christine Amara, Rachid |
author_sort |
Denis, Jérémy |
title |
The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries |
title_short |
The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries |
title_full |
The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries |
title_fullStr |
The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries |
title_full_unstemmed |
The Influence of Natural and Anthropogenic Environmental Pressures on European Eel Abundances in French Estuaries |
title_sort |
influence of natural and anthropogenic environmental pressures on european eel abundances in french estuaries |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04523322 https://hal.science/hal-04523322/document https://hal.science/hal-04523322/file/fishes-09-00044.pdf https://doi.org/10.3390/fishes9020044 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 2410-3888 Fishes https://hal.science/hal-04523322 Fishes, 2024, 9 (2), pp.44. ⟨10.3390/fishes9020044⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/fishes9020044 hal-04523322 https://hal.science/hal-04523322 https://hal.science/hal-04523322/document https://hal.science/hal-04523322/file/fishes-09-00044.pdf doi:10.3390/fishes9020044 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/fishes9020044 |
container_title |
Fishes |
container_volume |
9 |
container_issue |
2 |
container_start_page |
44 |
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1802640946319327232 |