Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river
The efficiency of the ongoing fish lift installed at Baigts hydroelectric power plant on the Pau River was assessed shortly after building of the lower part of the pass in spring 2000. The present study consisted in (i) trapping all fish entering the fishpass to test its comprehensive functioning an...
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2001
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ftccsdartic:oai:HAL:hal-02580506v1 2023-05-15T15:32:17+02:00 Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river Etude de l'efficacité du futur ascenseur à poissons de l'aménagement hydroélectrique EDF de Baigts de Béarn sur le gave de Pau Chanseau, M. Larinier, M. Ressources aquatiques continentales (UR RABX) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) irstea 2001 https://hal.inrae.fr/hal-02580506 fr fre HAL CCSD hal-02580506 https://hal.inrae.fr/hal-02580506 IRSTEA: PUB00010239 https://hal.inrae.fr/hal-02580506 irstea. 2001, pp.17 FRANCE PYRENEES ATLANTIQUES BAIGTS PAU GAVE [SDE]Environmental Sciences info:eu-repo/semantics/report Reports 2001 ftccsdartic 2021-11-21T00:51:39Z The efficiency of the ongoing fish lift installed at Baigts hydroelectric power plant on the Pau River was assessed shortly after building of the lower part of the pass in spring 2000. The present study consisted in (i) trapping all fish entering the fishpass to test its comprehensive functioning and (ii) monitoring small-scale movements of radio-tagged salmon nearby the obstacle to specify its impact both in terms of proportions of upstream passages and migration delays. From 14/06 to 03/12/2000, 5,305 fish from 26 different fish species including 6 diadromous migratory species were trapped, among which 19 allis shad, 1 twaite shad, 59 lamprey, 26 eel, 55 sea trout and 257 Atlantic salmon. Sampling sizes especially for shad, lamprey and eel did not account for their abundance in the Pau River in 2000 as field sampling starting nearly to the end of the migration period for both shad and lamprey and because of a selective bar-spacing effect of the trapping device on eel. For salmon, its abundance in the Pau River was found to attain a minimum of 300 specimens in 2000. Radio-tracking of 28 returning adult salmon gave evidence of a significantly improved upstream passing of the obstacle. The rates of upstream passage averaging 34% in the period 1995-1997 increased up to 50% to 80% in 2000 which may be partly attributed to increased fishpass attractivity. Nevertheless, considering the migration delays still too long (median blockade: 53 days; min.: 0.4 day; max.: 137 days) and also the position of the obstacle on the river, located further downstream of major spawning grounds, the efficiency of such a fish pass has yet to be improved so as to make the hydroelectric power plant of Baigts compatible with strategies for restoring Atlantic salmon stocks on the Pau River. A deep under-standing of salmon behaviour at the two different fish passes of Baigts and Castetarbe plants let then suppose that only sustained incursions and presence duration of fish near the fish pass entrance might most likely significantly enhance ... Report Atlantic salmon Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
FRANCE PYRENEES ATLANTIQUES BAIGTS PAU GAVE [SDE]Environmental Sciences |
spellingShingle |
FRANCE PYRENEES ATLANTIQUES BAIGTS PAU GAVE [SDE]Environmental Sciences Chanseau, M. Larinier, M. Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river |
topic_facet |
FRANCE PYRENEES ATLANTIQUES BAIGTS PAU GAVE [SDE]Environmental Sciences |
description |
The efficiency of the ongoing fish lift installed at Baigts hydroelectric power plant on the Pau River was assessed shortly after building of the lower part of the pass in spring 2000. The present study consisted in (i) trapping all fish entering the fishpass to test its comprehensive functioning and (ii) monitoring small-scale movements of radio-tagged salmon nearby the obstacle to specify its impact both in terms of proportions of upstream passages and migration delays. From 14/06 to 03/12/2000, 5,305 fish from 26 different fish species including 6 diadromous migratory species were trapped, among which 19 allis shad, 1 twaite shad, 59 lamprey, 26 eel, 55 sea trout and 257 Atlantic salmon. Sampling sizes especially for shad, lamprey and eel did not account for their abundance in the Pau River in 2000 as field sampling starting nearly to the end of the migration period for both shad and lamprey and because of a selective bar-spacing effect of the trapping device on eel. For salmon, its abundance in the Pau River was found to attain a minimum of 300 specimens in 2000. Radio-tracking of 28 returning adult salmon gave evidence of a significantly improved upstream passing of the obstacle. The rates of upstream passage averaging 34% in the period 1995-1997 increased up to 50% to 80% in 2000 which may be partly attributed to increased fishpass attractivity. Nevertheless, considering the migration delays still too long (median blockade: 53 days; min.: 0.4 day; max.: 137 days) and also the position of the obstacle on the river, located further downstream of major spawning grounds, the efficiency of such a fish pass has yet to be improved so as to make the hydroelectric power plant of Baigts compatible with strategies for restoring Atlantic salmon stocks on the Pau River. A deep under-standing of salmon behaviour at the two different fish passes of Baigts and Castetarbe plants let then suppose that only sustained incursions and presence duration of fish near the fish pass entrance might most likely significantly enhance ... |
author2 |
Ressources aquatiques continentales (UR RABX) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Groupe d'hydraulique appliquée aux aménagements piscicoles et à la protection de l'environnement (UR GHAAPPE) irstea |
format |
Report |
author |
Chanseau, M. Larinier, M. |
author_facet |
Chanseau, M. Larinier, M. |
author_sort |
Chanseau, M. |
title |
Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river |
title_short |
Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river |
title_full |
Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river |
title_fullStr |
Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river |
title_full_unstemmed |
Efficiency of the future fish lift of the hydroelectric power plant of Baigts on the Pau river |
title_sort |
efficiency of the future fish lift of the hydroelectric power plant of baigts on the pau river |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.inrae.fr/hal-02580506 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
https://hal.inrae.fr/hal-02580506 irstea. 2001, pp.17 |
op_relation |
hal-02580506 https://hal.inrae.fr/hal-02580506 IRSTEA: PUB00010239 |
_version_ |
1766362792903835648 |