Article (Scientific journals)
Multi-year analysis of the fish colonisation dynamic in three newly installed fishways in medium sized Belgian rivers
Gelder, Justine; Benitez, Jean-Philippe; Ovidio, Michaël
2023In Knowledge and Management of Aquatic Ecosystems, 424 (12)
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Keywords :
fishway; monitoring; river connectivity; temporal trend; migration
Abstract :
[en] The temporal dynamic use of newly installed fishways after a reopening event is not well known as most studies are not performed just after the opening and are generally limited to a single season or year. We carried out monitoring of three fishways for several consecutive years on three rivers in Belgium from the date of their opening. To identify the colonisation dynamics of fish species, we analysed temporal patterns in specific diversity, abundance, biomass, and associated environmental conditions. We detected different capture peaks and the appearance of new species several years after opening the migratory axis (up to 8 years post-opening). The dynamic of colonization showed that the same species may migrate earlier or later depending on the river. The analysis of the periodicity of capture indicated that some species made movements throughout the year while others at more precise periods. Moreover, the periodicity of movements was either stable or fluctuating over the year of monitoring, depending on the species. Our results highlight the importance of long-term monitoring to detect temporal dynamics in fish colonisation, allowing to improve our understanding of the opening effect of a migratory axis.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Gelder, Justine  ;  Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS)
Benitez, Jean-Philippe  ;  Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS) ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Gestion des ressources aquatiques et aquaculture
Ovidio, Michaël  ;  Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS) ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Gestion des ressources aquatiques et aquaculture
Language :
English
Title :
Multi-year analysis of the fish colonisation dynamic in three newly installed fishways in medium sized Belgian rivers
Publication date :
May 2023
Journal title :
Knowledge and Management of Aquatic Ecosystems
ISSN :
1961-9502
Publisher :
EDP Sciences, France
Volume :
424
Issue :
12
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
14. Life below water
Funders :
SPW - Public Service of Wallonia [BE]
Available on ORBi :
since 17 May 2023

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