On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn
Abstract Aprahamian, M. W., Walker, A. M., Williams, B., Bark, A., and Knights, B. 2007. On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn. – ICES Journal of Marine Science, 64: 1472–1482. The Europ...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsm131 http://academic.oup.com/icesjms/article-pdf/64/7/1472/29152680/fsm131.pdf |
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croxfordunivpr:10.1093/icesjms/fsm131 2024-06-23T07:45:32+00:00 On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn Aprahamian, M. W. Walker, A. M. Williams, B. Bark, A. Knights, B. 2007 http://dx.doi.org/10.1093/icesjms/fsm131 http://academic.oup.com/icesjms/article-pdf/64/7/1472/29152680/fsm131.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 64, issue 7, page 1472-1482 ISSN 1095-9289 1054-3139 journal-article 2007 croxfordunivpr https://doi.org/10.1093/icesjms/fsm131 2024-06-11T04:17:12Z Abstract Aprahamian, M. W., Walker, A. M., Williams, B., Bark, A., and Knights, B. 2007. On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn. – ICES Journal of Marine Science, 64: 1472–1482. The European eel stock has declined significantly since the 1980s, and the Eel Recovery Plan of the European Commission requires Member States to develop river basin Eel Management Plans (EMPs) that will achieve an escapement of silver eels that equals or exceeds 40% of the escapement biomass that would be produced in the absence of human activities. However, because silver eel escapement is not quantified within the UK, a modelling approach is required to estimate potential and actual escapement, and to assess the likely effects of management measures. We focus on two approaches developed in the UK, the Reference Condition Model (RCM) and the Scenario-based Model for Eel Populations (SMEP), and illustrate how such approaches can be used in EMPs using selected data from the River Severn. The RCM results indicate that the yellow eel population in the River Severn basin may be just 30–40% of the potential density indicated by reference conditions derived from a selection of rivers between the late 1970s and the early 1980s. The challenges of applying a model designed to be as realistic of eel production as possible, and the limited data on natural eel habitat and eel production in the Severn, preclude a SMEP analysis similar to that of the RCM, but simulations based on a simplified basin description and eel survey data from the early 1980s illustrate the potential of this model to assess compliance and test management scenarios. Article in Journal/Newspaper Anguilla anguilla Oxford University Press ICES Journal of Marine Science 64 7 1472 1482 |
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Oxford University Press |
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description |
Abstract Aprahamian, M. W., Walker, A. M., Williams, B., Bark, A., and Knights, B. 2007. On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn. – ICES Journal of Marine Science, 64: 1472–1482. The European eel stock has declined significantly since the 1980s, and the Eel Recovery Plan of the European Commission requires Member States to develop river basin Eel Management Plans (EMPs) that will achieve an escapement of silver eels that equals or exceeds 40% of the escapement biomass that would be produced in the absence of human activities. However, because silver eel escapement is not quantified within the UK, a modelling approach is required to estimate potential and actual escapement, and to assess the likely effects of management measures. We focus on two approaches developed in the UK, the Reference Condition Model (RCM) and the Scenario-based Model for Eel Populations (SMEP), and illustrate how such approaches can be used in EMPs using selected data from the River Severn. The RCM results indicate that the yellow eel population in the River Severn basin may be just 30–40% of the potential density indicated by reference conditions derived from a selection of rivers between the late 1970s and the early 1980s. The challenges of applying a model designed to be as realistic of eel production as possible, and the limited data on natural eel habitat and eel production in the Severn, preclude a SMEP analysis similar to that of the RCM, but simulations based on a simplified basin description and eel survey data from the early 1980s illustrate the potential of this model to assess compliance and test management scenarios. |
format |
Article in Journal/Newspaper |
author |
Aprahamian, M. W. Walker, A. M. Williams, B. Bark, A. Knights, B. |
spellingShingle |
Aprahamian, M. W. Walker, A. M. Williams, B. Bark, A. Knights, B. On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn |
author_facet |
Aprahamian, M. W. Walker, A. M. Williams, B. Bark, A. Knights, B. |
author_sort |
Aprahamian, M. W. |
title |
On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn |
title_short |
On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn |
title_full |
On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn |
title_fullStr |
On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn |
title_full_unstemmed |
On the application of models of European eel (Anguilla anguilla) production and escapement to the development of Eel Management Plans: the River Severn |
title_sort |
on the application of models of european eel (anguilla anguilla) production and escapement to the development of eel management plans: the river severn |
publisher |
Oxford University Press (OUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1093/icesjms/fsm131 http://academic.oup.com/icesjms/article-pdf/64/7/1472/29152680/fsm131.pdf |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ICES Journal of Marine Science volume 64, issue 7, page 1472-1482 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsm131 |
container_title |
ICES Journal of Marine Science |
container_volume |
64 |
container_issue |
7 |
container_start_page |
1472 |
op_container_end_page |
1482 |
_version_ |
1802640626186977280 |