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Impact assessment and remediation of anthropogenic interventions on fish populations (FISHGUARD)
Blust, Ronny; Verbiest, Hilde; Volckaert, Filip et al.
2006
 

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Keywords :
fish, migration, barrier, stocking,; lowland river, upland river, population structure,; genetic variation, swimming capacity
Abstract :
[en] The disruption of longitudinal river connectivity by man-made obstacles and the stocking of fish communities with non-indigenous species or genotypes threaten the fish fauna of Belgian rivers to various extends. Obstacles impede migrations between habitats that are vital for populations, and they may restrict the gene flow between populations, thereby reducing the effective size and genetic diversity of populations and increasing the risk of local extinction. Restocking programs often involve the introduction of non-indigenous genotypes in native populations. Moreover, although stocking programs lead to the temporal and superficial enrichment of local fish communities or gene pools, they generally result in a loss of biodiversity on a regional or international scale through the homogenisation of communities and the breakdown of genetic differentiation between populations. Thus, stocking programs cannot compensate for the loss of free migration by artificial obstructions. The impact of these changes on fish populations remains largely unknown, which complicates the priorisation of spots to preserve and spots to restore. Here, we present an integrated study on Belgian waters, both in Flanders and Wallonia, which analyses fish communities, gene flow and migration patterns in the field, as well as the swimming and leaping performances of fishes under controlled conditions.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Blust, Ronny;  Universiteit Antwerpen-UA
Verbiest, Hilde;  Research Institute for Nature and Forest
Volckaert, Filip;  Katholieke Universiteit Leuven - KUL > Laboratory of Aquatic Ecology
Baret, Philippe;  Université Catholique de Louvain - UCL > Genetic Unit
Philippart, Jean-Claude ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
Impact assessment and remediation of anthropogenic interventions on fish populations (FISHGUARD)
Publication date :
January 2006
Publisher :
Belgian Science Policy, Brussels, Belgium
Report number :
Rapport final du projet EV/31 (Fishguard) du programme SPSD II (2000-2005) - Scientific Support Plan for a Sustainable Development Policy; Part 2 - Global Change, Ecosystems and Biodiversity
Edition :
D/2007/1191/41
Number of pages :
98
Name of the research project :
FISHGUARD
Funders :
SSTC - Services Fédéraux des Affaires Scientifiques, Techniques et Culturelles [BE]
Commentary :
L'équipe scientifique de l'Université de Liège était composée de J.C. Philippart et M. Ovidio.
Available on ORBi :
since 30 October 2009

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