Effect of management measures on glass eel escapement
Abstract Stocks of European eel (Anguilla anguilla) have declined continuously and steadily, since 1980. A model, GEMAC, namely Glass Eel Model to Assess Compliance, has been developed with the objective of assessing anthropogenic impacts on glass eels in estuaries and evaluating the effects of mana...
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2007
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsm071 http://academic.oup.com/icesjms/article-pdf/64/7/1402/29152284/fsm071.pdf |
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croxfordunivpr:10.1093/icesjms/fsm071 2023-12-31T09:59:02+01:00 Effect of management measures on glass eel escapement Beaulaton, Laurent Briand, Cédric 2007 http://dx.doi.org/10.1093/icesjms/fsm071 http://academic.oup.com/icesjms/article-pdf/64/7/1402/29152284/fsm071.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 64, issue 7, page 1402-1413 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2007 croxfordunivpr https://doi.org/10.1093/icesjms/fsm071 2023-12-06T09:02:32Z Abstract Stocks of European eel (Anguilla anguilla) have declined continuously and steadily, since 1980. A model, GEMAC, namely Glass Eel Model to Assess Compliance, has been developed with the objective of assessing anthropogenic impacts on glass eels in estuaries and evaluating the effects of management measures, to support initiatives aimed at helping the eel stocks recover. The model is described and applied to two estuaries with contrasting anthropogenic pressures: the Vilaine and the Garonne. It assesses the proportion of settled glass eels relative to a non-impacted situation with current (%S/R) or pristine recruitment (%S/R0). The estimated %S/R (%S/R0) is 5.5% (1.1%) for the Vilaine and 78% (19%) for the Garonne, in accord with the different levels of anthropogenic pressure in these two estuaries. A sensitivity analysis shows that the assessment of %S/R is accurate, and that in a data-poor context, the %S/R is under-assessed, as required by the precautionary approach. Seven management scenarios are explored all aiming to halve the anthropogenic pressure, but in fact leading to different levels of glass eel escapement, from almost zero to a 13-fold increase. This variation emphasizes the need for the estuarine context of eel stock management to be carefully evaluated for effectiveness when implementing management measures. Article in Journal/Newspaper Anguilla anguilla Oxford University Press (via Crossref) ICES Journal of Marine Science 64 7 1402 1413 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Beaulaton, Laurent Briand, Cédric Effect of management measures on glass eel escapement |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Stocks of European eel (Anguilla anguilla) have declined continuously and steadily, since 1980. A model, GEMAC, namely Glass Eel Model to Assess Compliance, has been developed with the objective of assessing anthropogenic impacts on glass eels in estuaries and evaluating the effects of management measures, to support initiatives aimed at helping the eel stocks recover. The model is described and applied to two estuaries with contrasting anthropogenic pressures: the Vilaine and the Garonne. It assesses the proportion of settled glass eels relative to a non-impacted situation with current (%S/R) or pristine recruitment (%S/R0). The estimated %S/R (%S/R0) is 5.5% (1.1%) for the Vilaine and 78% (19%) for the Garonne, in accord with the different levels of anthropogenic pressure in these two estuaries. A sensitivity analysis shows that the assessment of %S/R is accurate, and that in a data-poor context, the %S/R is under-assessed, as required by the precautionary approach. Seven management scenarios are explored all aiming to halve the anthropogenic pressure, but in fact leading to different levels of glass eel escapement, from almost zero to a 13-fold increase. This variation emphasizes the need for the estuarine context of eel stock management to be carefully evaluated for effectiveness when implementing management measures. |
format |
Article in Journal/Newspaper |
author |
Beaulaton, Laurent Briand, Cédric |
author_facet |
Beaulaton, Laurent Briand, Cédric |
author_sort |
Beaulaton, Laurent |
title |
Effect of management measures on glass eel escapement |
title_short |
Effect of management measures on glass eel escapement |
title_full |
Effect of management measures on glass eel escapement |
title_fullStr |
Effect of management measures on glass eel escapement |
title_full_unstemmed |
Effect of management measures on glass eel escapement |
title_sort |
effect of management measures on glass eel escapement |
publisher |
Oxford University Press (OUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1093/icesjms/fsm071 http://academic.oup.com/icesjms/article-pdf/64/7/1402/29152284/fsm071.pdf |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ICES Journal of Marine Science volume 64, issue 7, page 1402-1413 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsm071 |
container_title |
ICES Journal of Marine Science |
container_volume |
64 |
container_issue |
7 |
container_start_page |
1402 |
op_container_end_page |
1413 |
_version_ |
1786823699129696256 |