Article (Scientific journals)
The use of behavioural metrics to evaluate fishway efficiency
Ovidio, Michaël; Sonny, Damien; Dierckx, Arnaud et al.
2017In River Research and Applications, 33 (9), p. 1484-1493
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Keywords :
Fishway efficiency; Behavioural metrics; Potamodromous fish; telemetry
Abstract :
[en] Fishways are installed worldwide to facilitate accessibility to functional habitats and to increase the ecological continuity of rivers. Their evaluations are increasing, but complete studies in the field with wild individuals are still scarce. In the lower Bocq River (Belgium), a pool type fishway was installed in 2011. A combined passive‐integrated‐transponder‐tag and radio‐telemetry system was designed and installed downstream of the dam and in the fishway to analyse fine‐scale individual fish behaviour. Three fish species (brown trout, European grayling, and barbel) were captured in the river; n = 125 fish were tagged and released downstream of the fishway. Behavioural metrics were proposed and used in order to attain a comprehensive view on the efficiency of the fishway, including attraction and entrance efficiency, searching and passage delays, and overall and adjusted passage efficiency. The results indicate a major problem in terms of attraction efficiency (48.9% for the trout, 20.5% for the grayling, and 41.2% for the barbel) and time to find the entrance of the fishway (mean 65.1 hr for the trout and 538.9 r for the grayling). For fish that succeed to approach the entrance of the fishway, the passage efficiency was 86.9% for the trout, 55.5% for the grayling, and 7.1% for the barbel. The time taken to cross the structure was reasonable for the salmonids (mean < 1.5 hr for trout and grayling) but very long (21 hr) for the barbel. Our results underline the necessity of a holistic approach to evaluate fishway efficiency using precise comprehensive metrics and hydraulic characterization.
Research Center/Unit :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Environmental sciences & ecology
Author, co-author :
Ovidio, Michaël  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie
Sonny, Damien;  Profish Technology
Dierckx, Arnaud ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie
Watthez, Quentin;  Profish Technology
Bourguignon, Sophie
de le Court, Bernard;  SPW-DGO3-CENN
Detrait, Olivier;  SPW-DGO3-CENN
Benitez, Jean-Philippe  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie
Language :
English
Title :
The use of behavioural metrics to evaluate fishway efficiency
Publication date :
September 2017
Journal title :
River Research and Applications
ISSN :
1535-1459
eISSN :
1535-1467
Publisher :
John Wiley & Sons, Inc, Chichester, United Kingdom
Volume :
33
Issue :
9
Pages :
1484-1493
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
SPW DG03-DGARNE - Service Public de Wallonie. Direction Générale Opérationnelle Agriculture, Ressources naturelles et Environnement
Available on ORBi :
since 28 September 2017

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