Adjusted barrier management to improve glass eel migration at an estuarine barrier
European eel Anguilla anguilla (L.) populations have declined dramatically during the last decades and are now among the most critically endangered fish populations in Europe. The limitation of upstream migration of glass eels is considered to be one of the key factors reducing eel populations. The...
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ftunivmassamh:oai:scholarworks.umass.edu:fishpassage_journal_articles-2583 2023-05-15T13:26:52+02:00 Adjusted barrier management to improve glass eel migration at an estuarine barrier Mouton, A M Stevens, M Van den Neucker, T Buysse, D Coeck, J 2011-01-01T08:00:00Z https://scholarworks.umass.edu/fishpassage_journal_articles/1584 unknown ScholarWorks@UMass Amherst https://scholarworks.umass.edu/fishpassage_journal_articles/1584 Journal Articles Anguilla Anguilla anguilla barriers eels European eel fish population Glass eel juvenile migration mitigation upstream upstream migration text 2011 ftunivmassamh 2022-01-09T19:38:22Z European eel Anguilla anguilla (L.) populations have declined dramatically during the last decades and are now among the most critically endangered fish populations in Europe. The limitation of upstream migration of glass eels is considered to be one of the key factors reducing eel populations. The migration of eels in their juvenile stage (glass eels) was studied, and options to improve eel passage at a tidal barrier complex at the mouth of the Yser River, Flanders, Belgium, were assessed. Glass eels were sampled during tidal rise with stow nets and lift nets to analyse their distribution over the study area, while a fyke net was used to evaluate the impact of limited barrier opening on glass eel migration. Support-vector machine-based analysis of the lift net data indicated that migrating glass eels are attracted by the fresh water flow leaking from the barriers, whereas other variables such as the sampling location only had a weak influence on the glass eel density. Limited barrier opening during tidal rise appeared to be a cost-efficient and effective mitigation option to improve upstream glass eel migration without significant intrusion of seawater. Adjusted barrier management could often be implemented and applied on numerous tidal barriers. Therefore the results of this paper are of interest to a wide range of river managers and stakeholders and may contribute to the conservation of many eel populations. Text Anguilla anguilla University of Massachusetts: ScholarWorks@UMass Amherst |
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Open Polar |
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University of Massachusetts: ScholarWorks@UMass Amherst |
op_collection_id |
ftunivmassamh |
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topic |
Anguilla Anguilla anguilla barriers eels European eel fish population Glass eel juvenile migration mitigation upstream upstream migration |
spellingShingle |
Anguilla Anguilla anguilla barriers eels European eel fish population Glass eel juvenile migration mitigation upstream upstream migration Mouton, A M Stevens, M Van den Neucker, T Buysse, D Coeck, J Adjusted barrier management to improve glass eel migration at an estuarine barrier |
topic_facet |
Anguilla Anguilla anguilla barriers eels European eel fish population Glass eel juvenile migration mitigation upstream upstream migration |
description |
European eel Anguilla anguilla (L.) populations have declined dramatically during the last decades and are now among the most critically endangered fish populations in Europe. The limitation of upstream migration of glass eels is considered to be one of the key factors reducing eel populations. The migration of eels in their juvenile stage (glass eels) was studied, and options to improve eel passage at a tidal barrier complex at the mouth of the Yser River, Flanders, Belgium, were assessed. Glass eels were sampled during tidal rise with stow nets and lift nets to analyse their distribution over the study area, while a fyke net was used to evaluate the impact of limited barrier opening on glass eel migration. Support-vector machine-based analysis of the lift net data indicated that migrating glass eels are attracted by the fresh water flow leaking from the barriers, whereas other variables such as the sampling location only had a weak influence on the glass eel density. Limited barrier opening during tidal rise appeared to be a cost-efficient and effective mitigation option to improve upstream glass eel migration without significant intrusion of seawater. Adjusted barrier management could often be implemented and applied on numerous tidal barriers. Therefore the results of this paper are of interest to a wide range of river managers and stakeholders and may contribute to the conservation of many eel populations. |
format |
Text |
author |
Mouton, A M Stevens, M Van den Neucker, T Buysse, D Coeck, J |
author_facet |
Mouton, A M Stevens, M Van den Neucker, T Buysse, D Coeck, J |
author_sort |
Mouton, A M |
title |
Adjusted barrier management to improve glass eel migration at an estuarine barrier |
title_short |
Adjusted barrier management to improve glass eel migration at an estuarine barrier |
title_full |
Adjusted barrier management to improve glass eel migration at an estuarine barrier |
title_fullStr |
Adjusted barrier management to improve glass eel migration at an estuarine barrier |
title_full_unstemmed |
Adjusted barrier management to improve glass eel migration at an estuarine barrier |
title_sort |
adjusted barrier management to improve glass eel migration at an estuarine barrier |
publisher |
ScholarWorks@UMass Amherst |
publishDate |
2011 |
url |
https://scholarworks.umass.edu/fishpassage_journal_articles/1584 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Journal Articles |
op_relation |
https://scholarworks.umass.edu/fishpassage_journal_articles/1584 |
_version_ |
1766394982233538560 |