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Development of the fish assemblage in a restored river backwater
Hohausová, Eva
The restoration of the Kurfürst backwater was undertaken between December 1993 and November 1994. Already during the restoration, the number of fish species (>1+ fish) increased to 12, compared to 9 recorded before it. The following monitoring programme (1995-99) revealed further increases, up to 17 species. The structure of the fish assemblage, in terms of main species, reproductive and ecological groups, did not differ substantially between years, regardless of seasonal changes. Six species were newly recorded after restoration. Most species were found as both, 0+ and older fish, as many species probably spawned in or used the backwater as a nursery. The structure of the 0+ fish assemblage was also similar both before and after the restoration. After the 6-year monitoring, the restoration of the backwater can be considered as of benefit for the fish assemblage. Now, much will depend on the following development of the backwater, if it can further serve for local fish populations.
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