Impact of dams and valley reservoirs on the diversity of ichthyofauna in the Czech Republic
1999
Lusk, S. (Akademie Ved, Brno (Czech Republic). Ustav Biologie Obratlovcu)
At present, negative consequences of the existence and operation prevail in the assessments of dam influences regarding diversity of the native ichthyofauna in the Czech Republic. Due to a dense network of dams, a restoration of the original occurrence extent in anadromous fish species like salmon (Salmo salar), sea trout (Salmo trutta trutta), sturgeon (Acipenser sturio) and others has been excluded. Dams prevent the original area restoration in the species that have come back to our streams after the water quality was improved, e.g. ziege (Pelecus cultratus), larger Danubian perch (Zingel zingel), sterlet (Acipenser ruthenus). Dam reservoirs constitute permanernt barriers preventing spreading of species which naturally penetrate into our country.
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