Reference : Assessment of the entering stock, migration dynamics and fish pass fidelity of europe...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/196081
Assessment of the entering stock, migration dynamics and fish pass fidelity of european eel in the belgian meuse river
English
Nzau Matondo, Billy mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie >]
Benitez, Jean-Philippe mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie >]
Dierckx, Arnaud mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie >]
Philippart, Jean-Claude mailto [Université de Liège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale >]
Ovidio, Michaël mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Laboratoire de Démographie des poissons et hydroécologie >]
2017
River Research and Applications
John Wiley & Sons, Inc
33
292-301
Yes (verified by ORBi)
International
1535-1459
1535-1467
Chichester
United Kingdom
[en] migration ; Fish-pass fidelity ; eel stock ; Meuse ; RFID detection ; anguilla anguilla
[en] Migration dynamics of incoming eels in Belgium via Lixhe in the Meuse River were investigated using two fish passes with different configurations— net traps and automatic detection stations—as tools to distinguish resident and migrating eels. From April to September 2013,
435 eels (P50 length, 403 mm; range, 196–836 mm) were caught (daily maxima catch, 90 eels per day), 90% between 13 June and 1 August (50 days) and P50 on 19 July. Eels migrated mostly at 19–26 °C (P50, 24.4 °C), river discharge 65–314m3 s 1 (P50, 84m3 s 1), during the
dark at 00:00–05:00 h and during both the waxing and waning phases of moonlight. From 396 eels tagged and released 0.3 km downstream of the Lixhe dam, 6.8% of them were recaptured, and 37.4% were detected. Migration flux was estimated at 7184 eels (0.863 t) using the markrecapture method and decreased to 1156 eels (0.139 t) using automatic transponder detection. Most eels probably migrated through a sluice located downstream of Lixhe to reach the upper Meuse via the Albert Canal. Eels moved almost independently to the configuration of the fish passes and their location, but most eels displayed fidelity to the fish pass where they were captured. Migrant eels showed a wide range of size and life stages, with a higher proportion of eels (80%) belonging to the yellow eel stage. A lower proportion of eels (6%) had a larger size and presented an advanced continental silvering process corresponding to the migrating stage before their transatlantic migration. Copyright © 2016 John Wiley & Sons, Ltd.
Applied and Fundamental FISH Research Center - AFFISH-RC ; Freshwater and OCeanic science Unit of reSearch - FOCUS
Fonds Européen pour la Pêche - SPW-DNF
DOI: 10.1002/rra.3034
Researchers ; Professionals ; Students ; Others
http://hdl.handle.net/2268/196081
10.1002/rra.3034

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