Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways
Abstract Flow characteristics associated with spillways are important to restore ecological connectivity because spillways can either constrain or offer safe routes for downstream passage of fish. We studied the hydrodynamics of flow and downstream movement behaviour of the catadromous European eel...
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crwiley:10.1002/rra.2904 2024-09-15T17:39:40+00:00 Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways Silva, A. T. Katopodis, C. Tachie, M. F. Santos, J. M. Ferreira, M. T. Fundação para a Ciência e a Tecnologia Fundação para a Ciência e a Tecnologia 2015 http://dx.doi.org/10.1002/rra.2904 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Frra.2904 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.2904 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor River Research and Applications volume 32, issue 5, page 935-945 ISSN 1535-1459 1535-1467 journal-article 2015 crwiley https://doi.org/10.1002/rra.2904 2024-07-30T04:21:50Z Abstract Flow characteristics associated with spillways are important to restore ecological connectivity because spillways can either constrain or offer safe routes for downstream passage of fish. We studied the hydrodynamics of flow and downstream movement behaviour of the catadromous European eel ( Anguilla anguilla ) and the potamodromous Iberian barbel ( Luciobarbus bocagei ) in spillways with upstream face inclinations of θ = 90° (standard) 45° and 30° (modified). The standard spillway was tested for two water depths ( H = 32 and 42 cm). Modified spillways facilitated downstream passage and reduced delay times of passage of the European eel. Upstream of the 90° spillway, distinct recirculation areas were observed, and associated turbulence strongly hampered downstream passage of fish. Both species were found to avoid turbulence, but barbel displayed stronger avoidance for areas of rapid changes in flow velocity when comparing to eels. Overall, eels were faster in passing the spillway and had a higher downstream passage success (80%) than barbel (32%). Eels were predominantly thigmotactic in contrast to barbel, which showed limited contact with structures. The results suggest that modified spillways may enhance passage survival. Copyright © 2015 John Wiley & Sons, Ltd. Article in Journal/Newspaper Anguilla anguilla European eel Wiley Online Library River Research and Applications 32 5 935 945 |
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Wiley Online Library |
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English |
description |
Abstract Flow characteristics associated with spillways are important to restore ecological connectivity because spillways can either constrain or offer safe routes for downstream passage of fish. We studied the hydrodynamics of flow and downstream movement behaviour of the catadromous European eel ( Anguilla anguilla ) and the potamodromous Iberian barbel ( Luciobarbus bocagei ) in spillways with upstream face inclinations of θ = 90° (standard) 45° and 30° (modified). The standard spillway was tested for two water depths ( H = 32 and 42 cm). Modified spillways facilitated downstream passage and reduced delay times of passage of the European eel. Upstream of the 90° spillway, distinct recirculation areas were observed, and associated turbulence strongly hampered downstream passage of fish. Both species were found to avoid turbulence, but barbel displayed stronger avoidance for areas of rapid changes in flow velocity when comparing to eels. Overall, eels were faster in passing the spillway and had a higher downstream passage success (80%) than barbel (32%). Eels were predominantly thigmotactic in contrast to barbel, which showed limited contact with structures. The results suggest that modified spillways may enhance passage survival. Copyright © 2015 John Wiley & Sons, Ltd. |
author2 |
Fundação para a Ciência e a Tecnologia Fundação para a Ciência e a Tecnologia |
format |
Article in Journal/Newspaper |
author |
Silva, A. T. Katopodis, C. Tachie, M. F. Santos, J. M. Ferreira, M. T. |
spellingShingle |
Silva, A. T. Katopodis, C. Tachie, M. F. Santos, J. M. Ferreira, M. T. Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways |
author_facet |
Silva, A. T. Katopodis, C. Tachie, M. F. Santos, J. M. Ferreira, M. T. |
author_sort |
Silva, A. T. |
title |
Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways |
title_short |
Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways |
title_full |
Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways |
title_fullStr |
Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways |
title_full_unstemmed |
Downstream Swimming Behaviour of Catadromous and Potamodromous Fish Over Spillways |
title_sort |
downstream swimming behaviour of catadromous and potamodromous fish over spillways |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/rra.2904 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Frra.2904 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.2904 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
River Research and Applications volume 32, issue 5, page 935-945 ISSN 1535-1459 1535-1467 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/rra.2904 |
container_title |
River Research and Applications |
container_volume |
32 |
container_issue |
5 |
container_start_page |
935 |
op_container_end_page |
945 |
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1810481641739517952 |