Rybí společenstva toků VÚ Boletice

The aim of the thesis was to monitor a population status of fish communities in two water catchments in SAC Boletice. The monitoring was performed in 2021 in five localities in the Blanice river catchment and in five localities in the Křemžský stream sector. The fish was caught with a help of electric current in a 100m long fishing sector. After setting the basic ichthyologic characteristics and evaluation the condition and health condition, the fish was returned back to their original habitat. There were four kinds of fish obtained (European bullhead, river trout, common minnow and European perch) and one kind of lamprey (brook lamprey). The locality with the highest diversity was locality No.3 (the Blanice - 3rd locality). On the other hand, there was no fish obtained in locality No.7 (Chlumanský stream below the pond) and there was only European perch obtained in locality No.8 (Chlumanský stream above the pond). The discussion of this thesis is focused on the links between the characteristics of individual localities and fish species occurrence as well as on a comparison of the results of the monitored flows with those from the previous years. Also the authors, who performed a SAC Boletice monitoring in previous years, had similar conclusions