Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France
Habitat use patterns of 3 species of temperate eels, Anguilla anguilla, A. japonica and A. rostrata, were investigated using otolith strontium:calcium ratio life history transects. Published and unpublished data from 6 sites (Canada, United States, Sweden, France, Taiwan and Japan) sampled across th...
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ftcemoa:oai:irsteadoc.irstea.fr:PUB00019151 2023-05-15T13:26:57+02:00 Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France Daverat, F. Tomas, J. CEMAGREF BORDEAUX EPBX IMEDEA ESPORLES ESP GIRONDE ESTUAIRE 2006 application/pdf https://irsteadoc.irstea.fr/cemoa/PUB00019151 Anglais eng https://irsteadoc.irstea.fr/cemoa/PUB00019151 Date de dépôt: 2006-03-02 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). 16176 ANGUILLA ANGUILLA OTOLITHE HABITAT ESTUAIRE MIGRATION CATADROME STATOLITHS HABITATS ESTUARIES Article de revue scientifique à comité de lecture 2006 ftcemoa 2021-06-29T08:45:08Z Habitat use patterns of 3 species of temperate eels, Anguilla anguilla, A. japonica and A. rostrata, were investigated using otolith strontium:calcium ratio life history transects. Published and unpublished data from 6 sites (Canada, United States, Sweden, France, Taiwan and Japan) sampled across the geographical range of each eel species were compiled. Sr:Ca patterns indicated that the 3 species displayed similar patterns of habitat use. In all sites, patterns of habitat use consisted of either residency in one habitat (fresh, brackish, or marine) or movements between habitats. One movement pattern consisted of either a single change or 2 changes of habitat from fresh to brackish waters, or from brackish water to freshwater. Seasonal movements between fresh and brackish waters were observed for all 3 species. When only a single habitat switch event was detected, it occurred between 3 and 5 yr of age. Occurrence of eels with no freshwater experience was demonstrated, but such eels accounted for a smaller proportion of the overall sample than eels with some (even brief) freshwater experience. Contrary to the common convention that these are obligate catadromous species, we must now consider them as facultative catadromous, with far more flexibility in habitat use. The most variable parameter among study sites was the relative proportion, rather than the diversity, of lifetime spent in the various habitat use patterns. Eels found at higher latitudes exhibited a greater probability of remaining in the lower reaches of watersheds in brackish water. Diversity of habitat use appears to be a common strategy of temperate eel species, and, as a life history tactic, is under environmental control. Article in Journal/Newspaper Anguilla anguilla European eel Irstea Publications et Bases documentaires (Irstea@doc/CemOA) Canada |
institution |
Open Polar |
collection |
Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
op_collection_id |
ftcemoa |
language |
English |
topic |
ANGUILLA ANGUILLA OTOLITHE HABITAT ESTUAIRE MIGRATION CATADROME STATOLITHS HABITATS ESTUARIES |
spellingShingle |
ANGUILLA ANGUILLA OTOLITHE HABITAT ESTUAIRE MIGRATION CATADROME STATOLITHS HABITATS ESTUARIES Daverat, F. Tomas, J. Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France |
topic_facet |
ANGUILLA ANGUILLA OTOLITHE HABITAT ESTUAIRE MIGRATION CATADROME STATOLITHS HABITATS ESTUARIES |
description |
Habitat use patterns of 3 species of temperate eels, Anguilla anguilla, A. japonica and A. rostrata, were investigated using otolith strontium:calcium ratio life history transects. Published and unpublished data from 6 sites (Canada, United States, Sweden, France, Taiwan and Japan) sampled across the geographical range of each eel species were compiled. Sr:Ca patterns indicated that the 3 species displayed similar patterns of habitat use. In all sites, patterns of habitat use consisted of either residency in one habitat (fresh, brackish, or marine) or movements between habitats. One movement pattern consisted of either a single change or 2 changes of habitat from fresh to brackish waters, or from brackish water to freshwater. Seasonal movements between fresh and brackish waters were observed for all 3 species. When only a single habitat switch event was detected, it occurred between 3 and 5 yr of age. Occurrence of eels with no freshwater experience was demonstrated, but such eels accounted for a smaller proportion of the overall sample than eels with some (even brief) freshwater experience. Contrary to the common convention that these are obligate catadromous species, we must now consider them as facultative catadromous, with far more flexibility in habitat use. The most variable parameter among study sites was the relative proportion, rather than the diversity, of lifetime spent in the various habitat use patterns. Eels found at higher latitudes exhibited a greater probability of remaining in the lower reaches of watersheds in brackish water. Diversity of habitat use appears to be a common strategy of temperate eel species, and, as a life history tactic, is under environmental control. |
author2 |
CEMAGREF BORDEAUX EPBX IMEDEA ESPORLES ESP |
format |
Article in Journal/Newspaper |
author |
Daverat, F. Tomas, J. |
author_facet |
Daverat, F. Tomas, J. |
author_sort |
Daverat, F. |
title |
Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France |
title_short |
Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France |
title_full |
Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France |
title_fullStr |
Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France |
title_full_unstemmed |
Tactics and demographic attributes in the European eel Anguilla anguilla in the Gironde watershed, SW France |
title_sort |
tactics and demographic attributes in the european eel anguilla anguilla in the gironde watershed, sw france |
publishDate |
2006 |
url |
https://irsteadoc.irstea.fr/cemoa/PUB00019151 |
op_coverage |
GIRONDE ESTUAIRE |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
16176 |
op_relation |
https://irsteadoc.irstea.fr/cemoa/PUB00019151 |
op_rights |
Date de dépôt: 2006-03-02 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). |
_version_ |
1766395494698844160 |