Effects of the construction of a reservoir on the fish assemblage in an inflow river

M. Hladík, J. Kubečka, T. Mrkvička, M. Čech, V. Draštík, J. Frouzová, E. Hohausová, J. Matěna, V. Matěnová, M. Kratochvíl, J. Peterka, M. Prchalová and M. Vašek
Additional contact information
M. Hladík: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
J. Kubečka: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
T. Mrkvička: University of South Bohemia, České Budějovice, Czech Republic
M. Čech: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
V. Draštík: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
J. Frouzová: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
E. Hohausová: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
J. Matěna: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
V. Matěnová: University of South Bohemia, České Budějovice, Czech Republic
M. Kratochvíl: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
J. Peterka: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
M. Prchalová: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic
M. Vašek: Biological Centre of Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice, Czech Republic

Czech Journal of Animal Science, 2008, vol. 53, issue 12, 537-547

Abstract: The construction of the Římov Reservoir on the Malše River in 1978 significantly influenced the fish assemblage within the river, above the reservoir. Fish species that had successfully colonised the reservoir after impoundment expanded to the inflowing river. The changes in the riverine fish assemblage up to the first impassable weir (4 km upstream) reflected the development of the reservoir assemblage after an impoundment boom of pike (Esox lucius), then the perch (Perca fluviatilis) dominated phase and later the final cyprinid-dominated phase. The changes in the fish fauna over the period 1978-2002 were significant (χ2, P < 0.001). During the cyprinid-dominated phase, roach (Rutilus rutilus) became the most abundant species both in the reservoir and in the river, outnumbering the pristine river species. We conclude that the cyprinid-dominated assemblage in the reservoir can be more aggressive in interfering with the river assemblage than the percid-dominated one.

Keywords: riverine fish; assemblage development; Czech Republic; reservoir tributary; electrofishing (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjs:v:53:y:2008:i:12:id:370-cjas

DOI: 10.17221/370-CJAS

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