Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation
Freshwater reclaimed marshes along the European Atlantic coast are highly suitable for European eels (Anguilla anguilla). However, European eel stocks have declined, and the coastal marshes have been subjected to major disturbances. The objective of our study was to analyze the processes governing p...
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ftunivtoulouseoa:oai:oatao.univ-toulouse.fr:6192 2023-05-15T13:27:14+02:00 Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation Laffaille, Pascal Baisez, Aurore Rigaud, Christian Feunteun, Eric Museum National d'Histoire Naturelle - MNHN (FRANCE) Institut national de recherche en sciences et technologies pour l’environnement et l’agriculture - CEMAGREF (FRANCE) Fish-Pass (FRANCE) Université de Rennes 1 (FRANCE) Ressources Aquatiques Continentales (Cestas, France) 2004-09 application/pdf http://oatao.univ-toulouse.fr/6192/ http://oatao.univ-toulouse.fr/6192/1/Laffaille_6192.pdf http://link.springer.com/article/10.1672/0277-5212%282004%29024%5B0642%3AHPODEE%5D2.0.CO%3B2 en eng SpringerLink http://oatao.univ-toulouse.fr/6192/1/Laffaille_6192.pdf HAL : hal-00815322 Laffaille, Pascal and Baisez, Aurore and Rigaud, Christian and Feunteun, Eric. Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation. (2004) Wetlands, 24 (3). 642-651. ISSN 0277-5212 info:eu-repo/semantics/openAccess Biodiversité Ecosystèmes Anguilla anguilla Reclaimed marsh Habitat Spatial organization Anthropic disturbances Article PeerReviewed info:eu-repo/semantics/article 2004 ftunivtoulouseoa 2019-08-29T11:17:44Z Freshwater reclaimed marshes along the European Atlantic coast are highly suitable for European eels (Anguilla anguilla). However, European eel stocks have declined, and the coastal marshes have been subjected to major disturbances. The objective of our study was to analyze the processes governing patterns of European eel microhabitat distribution of four eel size classes (from ,160 mm to .360 mm) in a reclaimed marsh (France). Analyses were conducted using artificial neural network (ANN) techniques and ecological profiles. Our ANN results showed that eel densities were significantly related to three major influencing variables: the width of ditch section, the silt depth, and the density of emergent plants. Such ecological profiles were significantly different between small (,240 mm) and large eels (.360 mm): small eels were more widespread than large eels. Large eels were absent or at low densities in shallow ditches with a high aquatic plant cover obstructing the water column and a large quantity of silt. These characteristics seem to define the ditches not directly connected with the main river where dredging operations were rare. Management of regular dredging operations in the channels by maintaining a mosaic of permanent aquatic habitats and avoiding the heavy silt loads in most ditches should be promoted. This dredging operation was probably one of the most promising ways for restoring inland eel stocks. Article in Journal/Newspaper Anguilla anguilla European eel OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse) |
institution |
Open Polar |
collection |
OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse) |
op_collection_id |
ftunivtoulouseoa |
language |
English |
topic |
Biodiversité Ecosystèmes Anguilla anguilla Reclaimed marsh Habitat Spatial organization Anthropic disturbances |
spellingShingle |
Biodiversité Ecosystèmes Anguilla anguilla Reclaimed marsh Habitat Spatial organization Anthropic disturbances Laffaille, Pascal Baisez, Aurore Rigaud, Christian Feunteun, Eric Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
topic_facet |
Biodiversité Ecosystèmes Anguilla anguilla Reclaimed marsh Habitat Spatial organization Anthropic disturbances |
description |
Freshwater reclaimed marshes along the European Atlantic coast are highly suitable for European eels (Anguilla anguilla). However, European eel stocks have declined, and the coastal marshes have been subjected to major disturbances. The objective of our study was to analyze the processes governing patterns of European eel microhabitat distribution of four eel size classes (from ,160 mm to .360 mm) in a reclaimed marsh (France). Analyses were conducted using artificial neural network (ANN) techniques and ecological profiles. Our ANN results showed that eel densities were significantly related to three major influencing variables: the width of ditch section, the silt depth, and the density of emergent plants. Such ecological profiles were significantly different between small (,240 mm) and large eels (.360 mm): small eels were more widespread than large eels. Large eels were absent or at low densities in shallow ditches with a high aquatic plant cover obstructing the water column and a large quantity of silt. These characteristics seem to define the ditches not directly connected with the main river where dredging operations were rare. Management of regular dredging operations in the channels by maintaining a mosaic of permanent aquatic habitats and avoiding the heavy silt loads in most ditches should be promoted. This dredging operation was probably one of the most promising ways for restoring inland eel stocks. |
author2 |
Museum National d'Histoire Naturelle - MNHN (FRANCE) Institut national de recherche en sciences et technologies pour l’environnement et l’agriculture - CEMAGREF (FRANCE) Fish-Pass (FRANCE) Université de Rennes 1 (FRANCE) Ressources Aquatiques Continentales (Cestas, France) |
format |
Article in Journal/Newspaper |
author |
Laffaille, Pascal Baisez, Aurore Rigaud, Christian Feunteun, Eric |
author_facet |
Laffaille, Pascal Baisez, Aurore Rigaud, Christian Feunteun, Eric |
author_sort |
Laffaille, Pascal |
title |
Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
title_short |
Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
title_full |
Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
title_fullStr |
Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
title_full_unstemmed |
Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
title_sort |
habitat preferences of different european eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation |
publisher |
SpringerLink |
publishDate |
2004 |
url |
http://oatao.univ-toulouse.fr/6192/ http://oatao.univ-toulouse.fr/6192/1/Laffaille_6192.pdf http://link.springer.com/article/10.1672/0277-5212%282004%29024%5B0642%3AHPODEE%5D2.0.CO%3B2 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_relation |
http://oatao.univ-toulouse.fr/6192/1/Laffaille_6192.pdf HAL : hal-00815322 Laffaille, Pascal and Baisez, Aurore and Rigaud, Christian and Feunteun, Eric. Habitat preferences of different European eel size classes in a reclaimed marsh: a contribution to species and ecosystem conservation. (2004) Wetlands, 24 (3). 642-651. ISSN 0277-5212 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766397197267501056 |