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What do we know to evaluate the health of brown trout (Salmo trutta) populations?
Gouraud, Véronique; Baran, Philippe; Bardonnet, Agnès et al.
2012In Proceedings of the 9th International Conference on Ecohydraulics
Peer reviewed
 

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Keywords :
Brown trout; health; population; Evaluation
Abstract :
[en] The renewed emphasis on the concept of the health of ecosystems highlights society’s interest in taking measures to protect environments transformed by human activity. The criteria used for evaluating the health of fish population are rarely discussed within the scientific community. The exercise proposed here aimed to discuss these for the brown trout (Salmo trutta), a flagship species from the freshwater fish community typical from headwaters of watercourses which represent most of the French hydrographic network. This initiative aimed to gather the ideas of a limited number of experts on the function of these populations and on the criteria for evaluating their function. The main key parameters were identified and organised into a hierarchical framework for each development stage. A consensus emerged on the fact that in the current stage of knowledge, the diagnosis can be established based on the analysis of abiotic parameters crucial for the biology and, with more difficulty, on the analysis of biotic parameters. For all the development stages, the identified parameters are linked to habitat (substrate, stream flow, temperature and water quality), hydrology and connectivity. Further knowledge must be acquired in order to be able to measure the biological criteria. That implies to reinforce longterm biological monitoring and research to understand the variability in biological parameters, the relevant spatiotemporal scales and the functional processes.
Research center :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Zoology
Author, co-author :
Gouraud, Véronique;  Electricité de France
Baran, Philippe;  Onema > Pôle Ecohydraulique
Bardonnet, Agnès;  Institut Scientifique de Recherche Agronomique - INRA > UPPA, UMR Ecobiop
Capra, Hervé;  IRSTEA > Laboratoire d'Hydroécologie Quantitative
Delacoste, Marc;  Fédération de Pêche des Hautes Pyrénées
Lascaux, Jean-Marc;  ECOGEA
Poulet, Nicolas;  Onema > Direction de l’Action Scientifique et Technique
Ovidio, Michaël  ;  Université de Liège - ULiège > Département de Biologie, Ecologie, Evolution. > Laboratoire de Démographie des Poissons et d'Hydroécologie (LDPH)
Baglinière, Jean-Luc;  Institut Scientifique de Recherche Agronomique - INRA > Ecologie et Santé des Ecosystèmes
Language :
English
Title :
What do we know to evaluate the health of brown trout (Salmo trutta) populations?
Publication date :
September 2012
Event name :
9th International Conference on Ecohydraulics
Event organizer :
BOKU
Event place :
Vienne, Austria
Event date :
Du 16 septembre au 22 septembre 2012
Audience :
International
Main work title :
Proceedings of the 9th International Conference on Ecohydraulics
Peer reviewed :
Peer reviewed
Available on ORBi :
since 23 October 2012

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