Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields
Anthropogenic structures (e.g. weirs and dams) fragment river networks and restrict the movement of migratory fish. Poor understanding of behavioural response to hydrodynamic cues at structures currently limits the development of effective barrier mitigation measures. This study aimed to assess the...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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Online Access: | http://dx.doi.org/10.1098/rspb.2015.1098 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.1098 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.1098 |
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crroyalsociety:10.1098/rspb.2015.1098 2024-09-09T19:00:32+00:00 Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields Piper, Adam T. Manes, Costantino Siniscalchi, Fabio Marion, Andrea Wright, Rosalind M. Kemp, Paul S. 2015 http://dx.doi.org/10.1098/rspb.2015.1098 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.1098 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.1098 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 282, issue 1811, page 20151098 ISSN 0962-8452 1471-2954 journal-article 2015 crroyalsociety https://doi.org/10.1098/rspb.2015.1098 2024-08-26T04:21:00Z Anthropogenic structures (e.g. weirs and dams) fragment river networks and restrict the movement of migratory fish. Poor understanding of behavioural response to hydrodynamic cues at structures currently limits the development of effective barrier mitigation measures. This study aimed to assess the effect of flow constriction and associated flow patterns on eel behaviour during downstream migration. In a field experiment, we tracked the movements of 40 tagged adult European eels ( Anguilla anguilla ) through the forebay of a redundant hydropower intake under two manipulated hydrodynamic treatments. Interrogation of fish trajectories in relation to measured and modelled water velocities provided new insights into behaviour, fundamental for developing passage technologies for this endangered species. Eels rarely followed direct routes through the site. Initially, fish aligned with streamlines near the channel banks and approached the intake semi-passively. A switch to more energetically costly avoidance behaviours occurred on encountering constricted flow, prior to physical contact with structures. Under high water velocity gradients, fish then tended to escape rapidly back upstream, whereas exploratory ‘search’ behaviour was common when acceleration was low. This study highlights the importance of hydrodynamics in informing eel behaviour. This offers potential to develop behavioural guidance, improve fish passage solutions and enhance traditional physical screening. Article in Journal/Newspaper Anguilla anguilla European eel The Royal Society Proceedings of the Royal Society B: Biological Sciences 282 1811 20151098 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Anthropogenic structures (e.g. weirs and dams) fragment river networks and restrict the movement of migratory fish. Poor understanding of behavioural response to hydrodynamic cues at structures currently limits the development of effective barrier mitigation measures. This study aimed to assess the effect of flow constriction and associated flow patterns on eel behaviour during downstream migration. In a field experiment, we tracked the movements of 40 tagged adult European eels ( Anguilla anguilla ) through the forebay of a redundant hydropower intake under two manipulated hydrodynamic treatments. Interrogation of fish trajectories in relation to measured and modelled water velocities provided new insights into behaviour, fundamental for developing passage technologies for this endangered species. Eels rarely followed direct routes through the site. Initially, fish aligned with streamlines near the channel banks and approached the intake semi-passively. A switch to more energetically costly avoidance behaviours occurred on encountering constricted flow, prior to physical contact with structures. Under high water velocity gradients, fish then tended to escape rapidly back upstream, whereas exploratory ‘search’ behaviour was common when acceleration was low. This study highlights the importance of hydrodynamics in informing eel behaviour. This offers potential to develop behavioural guidance, improve fish passage solutions and enhance traditional physical screening. |
format |
Article in Journal/Newspaper |
author |
Piper, Adam T. Manes, Costantino Siniscalchi, Fabio Marion, Andrea Wright, Rosalind M. Kemp, Paul S. |
spellingShingle |
Piper, Adam T. Manes, Costantino Siniscalchi, Fabio Marion, Andrea Wright, Rosalind M. Kemp, Paul S. Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields |
author_facet |
Piper, Adam T. Manes, Costantino Siniscalchi, Fabio Marion, Andrea Wright, Rosalind M. Kemp, Paul S. |
author_sort |
Piper, Adam T. |
title |
Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields |
title_short |
Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields |
title_full |
Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields |
title_fullStr |
Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields |
title_full_unstemmed |
Response of seaward-migrating European eel ( Anguilla anguilla) to manipulated flow fields |
title_sort |
response of seaward-migrating european eel ( anguilla anguilla) to manipulated flow fields |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://dx.doi.org/10.1098/rspb.2015.1098 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.1098 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.1098 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 282, issue 1811, page 20151098 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2015.1098 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
282 |
container_issue |
1811 |
container_start_page |
20151098 |
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1809940148227407872 |