Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula)
Fish passage at artificial barriers is necessary for the conservation of healthy fish stocks. The first barrier that migratory fish encounter when ascending the Ebro River is the Xerta Weir, where a pool-type fishway was constructed in 2008. From 2007 to 2010, boat electrofishing surveys were conducted in...
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Asociación Ibérica de Limnología
2012
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Online Access: | http://hdl.handle.net/10256/7833 |
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ftunivgironadugi:oai:dugi-doc.udg.edu:10256/7833 2023-05-15T13:28:18+02:00 Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) Aparicio, Enric Pintor, Cristina Duran, María Concepción Carmona Catot, Gerard 2012 application/pdf http://hdl.handle.net/10256/7833 eng eng Asociación Ibérica de Limnología info:eu-repo/semantics/altIdentifier/issn/0213-8409 info:eu-repo/semantics/altIdentifier/eissn/1989-1806 http://hdl.handle.net/10256/7833 Tots els drets reservats info:eu-repo/semantics/openAccess © Limnetica, 2012, vol. 31, núm. 1, p. 37-46 Articles publicats (D-CCAA) Peixos -- Protecció Fishes -- Conservation Peixos -- Migració Peixos -- Migration Enginyeria fluvial River engineering info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftunivgironadugi 2022-05-24T23:42:26Z Fish passage at artificial barriers is necessary for the conservation of healthy fish stocks. The first barrier that migratory fish encounter when ascending the Ebro River is the Xerta Weir, where a pool-type fishway was constructed in 2008. From 2007 to 2010, boat electrofishing surveys were conducted in the Ebro River downstream of the Xerta Weir to assess the potential pool of species that could use the fishway. Nine native and 12 exotic species were captured, the latter comprising 62 % of the relative abundance and 70 % of the biomass. A combination of video recording, electrofishing and trapping was used to assess the effectiveness of the fishway in facilitating the passage of fish. Eight species were detected using the fishway, of which five were native (Liza ramada, Anguilla anguilla, Barbus graellsii, Gobio lozanoi and Salaria fluviatilis) and three exotic (Alburnus alburnus, Cyprinus carpio and Rutilus rutilus). Only L. ramada used the fishway in substantial numbers. The rate of fish passage was the highest from June to August and decreased afterwards. The effectiveness of the fishway might be lowered by areas of turbulence within the fishway and by distraction flows from a nearby hydropower station El paso de peces a través de barreras artificiales es necesario para la conservación en buen estado de las poblaciones de peces. La primera barrera que los peces migratorios encuentran ascendiendo el Río Ebro es el Azud de Xerta, donde en 2008 se construyó una escala de peces del tipo de estanques sucesivos. Para determinar el conjunto de especies que potencialmente podrían usar la escala se llevaron a cabo muestreos mediante pesca eléctrica desde embarcación aguas abajo del azud. Nueve especies nativas y 12 exóticas fueron capturadas, representando estas últimas el 62 % de la abundancia relativa y el 70 % de la biomasa. Se usó una combinación de grabaciones de video, pesca eléctrica y trampeo para evaluar la efectividad de la escala de peces. Ocho especies fueron detectadas en la escala, de las cuales cinco eran nativas ... Article in Journal/Newspaper Anguilla anguilla Universitat de Girona: DUGiDocs (UdG Digital Repository) Weir ENVELOPE(177.167,177.167,-84.983,-84.983) |
institution |
Open Polar |
collection |
Universitat de Girona: DUGiDocs (UdG Digital Repository) |
op_collection_id |
ftunivgironadugi |
language |
English |
topic |
Peixos -- Protecció Fishes -- Conservation Peixos -- Migració Peixos -- Migration Enginyeria fluvial River engineering |
spellingShingle |
Peixos -- Protecció Fishes -- Conservation Peixos -- Migració Peixos -- Migration Enginyeria fluvial River engineering Aparicio, Enric Pintor, Cristina Duran, María Concepción Carmona Catot, Gerard Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) |
topic_facet |
Peixos -- Protecció Fishes -- Conservation Peixos -- Migració Peixos -- Migration Enginyeria fluvial River engineering |
description |
Fish passage at artificial barriers is necessary for the conservation of healthy fish stocks. The first barrier that migratory fish encounter when ascending the Ebro River is the Xerta Weir, where a pool-type fishway was constructed in 2008. From 2007 to 2010, boat electrofishing surveys were conducted in the Ebro River downstream of the Xerta Weir to assess the potential pool of species that could use the fishway. Nine native and 12 exotic species were captured, the latter comprising 62 % of the relative abundance and 70 % of the biomass. A combination of video recording, electrofishing and trapping was used to assess the effectiveness of the fishway in facilitating the passage of fish. Eight species were detected using the fishway, of which five were native (Liza ramada, Anguilla anguilla, Barbus graellsii, Gobio lozanoi and Salaria fluviatilis) and three exotic (Alburnus alburnus, Cyprinus carpio and Rutilus rutilus). Only L. ramada used the fishway in substantial numbers. The rate of fish passage was the highest from June to August and decreased afterwards. The effectiveness of the fishway might be lowered by areas of turbulence within the fishway and by distraction flows from a nearby hydropower station El paso de peces a través de barreras artificiales es necesario para la conservación en buen estado de las poblaciones de peces. La primera barrera que los peces migratorios encuentran ascendiendo el Río Ebro es el Azud de Xerta, donde en 2008 se construyó una escala de peces del tipo de estanques sucesivos. Para determinar el conjunto de especies que potencialmente podrían usar la escala se llevaron a cabo muestreos mediante pesca eléctrica desde embarcación aguas abajo del azud. Nueve especies nativas y 12 exóticas fueron capturadas, representando estas últimas el 62 % de la abundancia relativa y el 70 % de la biomasa. Se usó una combinación de grabaciones de video, pesca eléctrica y trampeo para evaluar la efectividad de la escala de peces. Ocho especies fueron detectadas en la escala, de las cuales cinco eran nativas ... |
format |
Article in Journal/Newspaper |
author |
Aparicio, Enric Pintor, Cristina Duran, María Concepción Carmona Catot, Gerard |
author_facet |
Aparicio, Enric Pintor, Cristina Duran, María Concepción Carmona Catot, Gerard |
author_sort |
Aparicio, Enric |
title |
Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) |
title_short |
Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) |
title_full |
Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) |
title_fullStr |
Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) |
title_full_unstemmed |
Fish passage assessment at the most downstream barrier of the Ebro River (NE Iberian Peninsula) |
title_sort |
fish passage assessment at the most downstream barrier of the ebro river (ne iberian peninsula) |
publisher |
Asociación Ibérica de Limnología |
publishDate |
2012 |
url |
http://hdl.handle.net/10256/7833 |
long_lat |
ENVELOPE(177.167,177.167,-84.983,-84.983) |
geographic |
Weir |
geographic_facet |
Weir |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
© Limnetica, 2012, vol. 31, núm. 1, p. 37-46 Articles publicats (D-CCAA) |
op_relation |
info:eu-repo/semantics/altIdentifier/issn/0213-8409 info:eu-repo/semantics/altIdentifier/eissn/1989-1806 http://hdl.handle.net/10256/7833 |
op_rights |
Tots els drets reservats info:eu-repo/semantics/openAccess |
_version_ |
1766403290438828032 |