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...
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ftpubmed:oai:pubmedcentral.nih.gov:4528561 2023-05-15T13:27:06+02:00 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. 2015-07-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4528561/ http://www.ncbi.nlm.nih.gov/pubmed/26136454 https://doi.org/10.1098/rspb.2015.1098 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4528561/ http://www.ncbi.nlm.nih.gov/pubmed/26136454 http://dx.doi.org/10.1098/rspb.2015.1098 http://creativecommons.org/licenses/by/4.0/ © 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Research Articles Text 2015 ftpubmed https://doi.org/10.1098/rspb.2015.1098 2015-08-16T00:07:37Z 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. Text Anguilla anguilla European eel PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 282 1811 20151098 |
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Research Articles |
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Research Articles 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 |
topic_facet |
Research Articles |
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 |
Text |
author |
Piper, Adam T. Manes, Costantino Siniscalchi, Fabio Marion, Andrea Wright, Rosalind M. Kemp, Paul S. |
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://www.ncbi.nlm.nih.gov/pmc/articles/PMC4528561/ http://www.ncbi.nlm.nih.gov/pubmed/26136454 https://doi.org/10.1098/rspb.2015.1098 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4528561/ http://www.ncbi.nlm.nih.gov/pubmed/26136454 http://dx.doi.org/10.1098/rspb.2015.1098 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ © 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rspb.2015.1098 |
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Proceedings of the Royal Society B: Biological Sciences |
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282 |
container_issue |
1811 |
container_start_page |
20151098 |
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