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Can turbulence statistics reflect the meso-habitat choice of juvenile salmonids
Enders, Eva; Ovidio, Michaël; Hallot, Eric et al.
2009In Proceedings of the combined conference on Hydro-Informatics and Ecohydraulics, Concepcion, Chile, January 2009.
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Keywords :
salmo salar; turbulence; behaviour; Québec; radio-telemetry; habitat choice
Abstract :
[en] Variables commonly used to describe the physical habitat of Atlantic salmon Salmo salar L. parr are average velocity, water depth, and substrate. A variety of micro- and meso-habitat models have been developed using these variables to assess habitat quality. However, Atlantic salmon parr live in highly turbulent streams and rivers, in which intense fluctuations of water velocity occur. Laboratory experiments have shown that turbulence affects the behavior and energetics of fish. Nevertheless, habitat use in relation to the strong temporal variability of velocity in natural environments has rarely been studied. In this study, Atlantic salmon parr habitat was examined in relation to turbulence in the Patapédia River, Québec, Canada. We analyzed meso-habitat use in relation to several dynamic hydraulic variables. Our results revealed that in a natural turbulent condition, parr displayed high individual variability in habitat use in relation to turbulence. Such heterogeneous use of habitat suggests that individuals are not constrained to a single habitat type but that they have a tendency to use areas with lower turbulence.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Enders, Eva
Ovidio, Michaël  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Démographie des poissons et hydroécologie
Hallot, Eric ;  Université de Liège - ULiège > Département de géographie > Hydrographie et géomorphologie fluviatile
Philippart, Jean-Claude ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Petit, François  ;  Université de Liège - ULiège > Département de géographie > Hydrographie et géomorphologie fluviatile
Roy, Mathieu
Boyer, Claudine
Roy, André
Language :
English
Title :
Can turbulence statistics reflect the meso-habitat choice of juvenile salmonids
Publication date :
2009
Event name :
Combined conference on Hydro-Informatics and Ecohydraulics, Concepcion, Chile, January 2009.
Event place :
Conception, Chile
Event date :
January 2009
Audience :
International
Main work title :
Proceedings of the combined conference on Hydro-Informatics and Ecohydraulics, Concepcion, Chile, January 2009.
Pages :
1-10
Peer reviewed :
Peer reviewed
Available on ORBi :
since 01 April 2010

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