Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks
Federation de Peche et de Protection des Milieux Aquatiques d'Ille-et-Vilaine contrat de plan Poissons Migrateurs European Union [GOCE-2008212133] 1. Despite carrying capacity being one of the most important parameters in population management and modelling, we lack substantial evidence for hab...
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ftsorbonneuniv:oai:HAL:hal-00808029v1 2024-04-28T08:18:08+00:00 Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks Acou, A. Rivot, Etienne van Gils, J.A. Legault, A. Ysnel, F. Feunteun, E. Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST UE;Fédération de Pêche et de Protection des Milieux Aquatiques d’Ille-et-Vilaine;contrat de plan Poissons Migrateurs 2011 https://institut-agro-rennes-angers.hal.science/hal-00808029 https://doi.org/10.1111/j.1365-2427.2010.02540.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2427.2010.02540.x hal-00808029 https://institut-agro-rennes-angers.hal.science/hal-00808029 doi:10.1111/j.1365-2427.2010.02540.x PRODINRA: 172635 WOS: 000289171400013 ISSN: 0046-5070 EISSN: 1365-2427 Freshwater Biology https://institut-agro-rennes-angers.hal.science/hal-00808029 Freshwater Biology, 2011, 56 (5), pp.952-968. ⟨10.1111/j.1365-2427.2010.02540.x⟩ Keywords: eel conservation exploited fish fish migration ideal free distribution habitat saturation modelling small populations [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery info:eu-repo/semantics/article Journal articles 2011 ftsorbonneuniv https://doi.org/10.1111/j.1365-2427.2010.02540.x 2024-04-01T17:04:47Z Federation de Peche et de Protection des Milieux Aquatiques d'Ille-et-Vilaine contrat de plan Poissons Migrateurs European Union [GOCE-2008212133] 1. Despite carrying capacity being one of the most important parameters in population management and modelling, we lack substantial evidence for habitat limitations on freshwater species. Here we tested the ideal free distribution (IFD) hypothesis using an indirect behaviour-based method for small closed populations assuming that animals can effectively estimate habitat suitability and distribute themselves accordingly in time and space.2. We analysed spatiotemporal variations in the density of the European eel Anguilla, a catadromous species with good colonisation abilities in a small coastal catchment in France. The general linear model used enabled us to test simultaneously the effect of temporal, macro- and meso-scale habitat factors on the presence and abundance of eels at 30 sites over an 8-year period.3. Almost every site sampled had eels, whatever its location on the catchment and its habitat characteristics. Density estimates (overall mean +/- SD of 0.40 +/- 0.48 m-2) were at the upper range of other values for European catchments. Moreover, eel densities were mainly influenced by the availability of suitable habitats (rocky substratum and instream cover), which suggests that their distribution reflects an IFD.4. Despite marked variability in recruitment, the density of the oldest size-class remained stable over the study, suggesting that density-dependent mortality occurred, probably due to intraspecific competition for space and food and to predation.5. These findings suggest that eel habitats are saturated in the Fremur. Therefore, we suggest that the mean abundance of eels observed could serve as a threshold value for other male-dominated river stocks (provided they have a similar overall percentage of suitable habitats) that are common in small, low gradient streams on the north-Atlantic coast of Europe. Article in Journal/Newspaper European eel North Atlantic HAL Sorbonne Université Freshwater Biology 56 5 952 968 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Keywords: eel conservation exploited fish fish migration ideal free distribution habitat saturation modelling small populations [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery |
spellingShingle |
Keywords: eel conservation exploited fish fish migration ideal free distribution habitat saturation modelling small populations [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery Acou, A. Rivot, Etienne van Gils, J.A. Legault, A. Ysnel, F. Feunteun, E. Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks |
topic_facet |
Keywords: eel conservation exploited fish fish migration ideal free distribution habitat saturation modelling small populations [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery |
description |
Federation de Peche et de Protection des Milieux Aquatiques d'Ille-et-Vilaine contrat de plan Poissons Migrateurs European Union [GOCE-2008212133] 1. Despite carrying capacity being one of the most important parameters in population management and modelling, we lack substantial evidence for habitat limitations on freshwater species. Here we tested the ideal free distribution (IFD) hypothesis using an indirect behaviour-based method for small closed populations assuming that animals can effectively estimate habitat suitability and distribute themselves accordingly in time and space.2. We analysed spatiotemporal variations in the density of the European eel Anguilla, a catadromous species with good colonisation abilities in a small coastal catchment in France. The general linear model used enabled us to test simultaneously the effect of temporal, macro- and meso-scale habitat factors on the presence and abundance of eels at 30 sites over an 8-year period.3. Almost every site sampled had eels, whatever its location on the catchment and its habitat characteristics. Density estimates (overall mean +/- SD of 0.40 +/- 0.48 m-2) were at the upper range of other values for European catchments. Moreover, eel densities were mainly influenced by the availability of suitable habitats (rocky substratum and instream cover), which suggests that their distribution reflects an IFD.4. Despite marked variability in recruitment, the density of the oldest size-class remained stable over the study, suggesting that density-dependent mortality occurred, probably due to intraspecific competition for space and food and to predation.5. These findings suggest that eel habitats are saturated in the Fremur. Therefore, we suggest that the mean abundance of eels observed could serve as a threshold value for other male-dominated river stocks (provided they have a similar overall percentage of suitable habitats) that are common in small, low gradient streams on the north-Atlantic coast of Europe. |
author2 |
Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST UE;Fédération de Pêche et de Protection des Milieux Aquatiques d’Ille-et-Vilaine;contrat de plan Poissons Migrateurs |
format |
Article in Journal/Newspaper |
author |
Acou, A. Rivot, Etienne van Gils, J.A. Legault, A. Ysnel, F. Feunteun, E. |
author_facet |
Acou, A. Rivot, Etienne van Gils, J.A. Legault, A. Ysnel, F. Feunteun, E. |
author_sort |
Acou, A. |
title |
Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks |
title_short |
Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks |
title_full |
Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks |
title_fullStr |
Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks |
title_full_unstemmed |
Habitat carrying capacity is reached for the European eel in a small coastal catchment: evidence and implications for managing eel stocks |
title_sort |
habitat carrying capacity is reached for the european eel in a small coastal catchment: evidence and implications for managing eel stocks |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://institut-agro-rennes-angers.hal.science/hal-00808029 https://doi.org/10.1111/j.1365-2427.2010.02540.x |
genre |
European eel North Atlantic |
genre_facet |
European eel North Atlantic |
op_source |
ISSN: 0046-5070 EISSN: 1365-2427 Freshwater Biology https://institut-agro-rennes-angers.hal.science/hal-00808029 Freshwater Biology, 2011, 56 (5), pp.952-968. ⟨10.1111/j.1365-2427.2010.02540.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2427.2010.02540.x hal-00808029 https://institut-agro-rennes-angers.hal.science/hal-00808029 doi:10.1111/j.1365-2427.2010.02540.x PRODINRA: 172635 WOS: 000289171400013 |
op_doi |
https://doi.org/10.1111/j.1365-2427.2010.02540.x |
container_title |
Freshwater Biology |
container_volume |
56 |
container_issue |
5 |
container_start_page |
952 |
op_container_end_page |
968 |
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1797582301788372992 |