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Food of noncarnivor fish in newly filling dam Chabařovice
ZEMAN, Jan
Lignite mine Chabařovice is steadfast in process gradual flood, his area from year 2001 shoot up to 174 ha (2005). In incunabulum filling dam Chabařovice come to undesirable leak in cyprinids fish to dam, and that to danger development water quality. Deal with especially about these species of fish: Bream, Roach and White bream.In year 2003 come to other leak in undesirable species of fish to dam and it Rudd probably of small sedimentation tanks subleak from small dam in river basin and Ruffe from pothole Catherine. At discharge pond Zálužanský, who find over dam come to other contamination ichtyofauna dam with drain water. Of investigation ichtyofauna in June 2005 ensue from, that act especially about Roach and Rudd. Of result catching is obvious, that come to swab these fish.This fish are undesirable, because feed largely of zooplankton, who filter algae and germ and that counteract eutrophication.In essence goes about it, hold back occurrence undesirable species of fish, live on largely zooplankton and it effect predator fish were catching during ichtiologického investigation at season June and September.In laboratory were individual folders food determinantion and evaluate rake-off share individual component food.
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