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Effects of a micro hydroelectric power plant upon population abundance, mobility and reproduction behaviour of European grayling T. thymallus and brown trout S. trutta in a salmonid river
Ovidio, Michaël; Paquer, Frédéric; Capra, Hervé et al.
2004In Garcia de Jalon, Diego; Vizcaino Martinez, Pilar (Eds.) International Symposium on Ecohydraulics. Aquatic habitat: Analysis & Restoration
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Keywords :
Fish; Environmental flow; Migration; Trout; Grayling; Telemetry; Demographic response
Abstract :
[en] This study examines the potential effects of a new micro hydroelectric power plant (MHPP) on the behaviour (habitat use, movements) and population abundance of European grayling (T. thymallus) and brown trout (S. trutta) in the Lhomme (Belgian Ardennes). Thirteen grayling and five brown trout were captured before their spawning period and were manually radio-tracked up to 6 times a week. Population density and biomass were estimated into two different sampling sectors with electric fishing, before and after the MHPP started up. The mobility patterns of grayling and trout in the reach of the river Lhomme influenced by the MHPP strongly contrasted with results obtained in an undisturbed river of the same type in the Belgian Ardennes. Movements were mostly restricted and rarely increased during the spawning period. Spawning took place, but was disturbed by hydropeakings. The population biomass of grayling and trout decreased by 61 % and 23 % respectively, five months after the start-up of the MHPP exploitation.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Ovidio, Michaël  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Démographie des poissons et hydroécologie
Paquer, Frédéric ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Aquarium-Muséum
Capra, Hervé;  Cemagref de Lyon
Lambot, Francis;  Service Public de Wallonie
Gérard, Pierre;  Service Public de Wallonie
Dupont, Etienne;  Service Public de Wallonie
Philippart, Jean-Claude ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
Effects of a micro hydroelectric power plant upon population abundance, mobility and reproduction behaviour of European grayling T. thymallus and brown trout S. trutta in a salmonid river
Publication date :
2004
Event name :
International Symposium on Ecohydraulics. Aquatic habitat: Analysis & Restoration
Event organizer :
IAHR
Event place :
Madrid, Spain
Event date :
du 12 septembre au 17 septembre 2004
Audience :
International
Main work title :
International Symposium on Ecohydraulics. Aquatic habitat: Analysis & Restoration
Author, co-author :
Garcia de Jalon, Diego
Vizcaino Martinez, Pilar
Peer reviewed :
Peer reviewed
Available on ORBi :
since 10 November 2009

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