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	Species variability of bentic organisms in Dračice river classicifed by PERLA system KOUTNIK, Dalibor Examination ecological size selected part of river (from village Františkov to border with Austria) on the basis of field watching. Observed results are analysed by system PERLA. Method is based on analysing biodiversity makrozoobenthos sample from fordables running water. Sampling can be apply in running water, where water column not exceed 1 m and speed of water stream to 1 m/s. Taking is made by normal or low water stage. Detailed record
	Characteristic of brook lamprey \kur{(Lampetra planeri)} habitats in the Malše River catchment HLAVÍNOVÁ, Lenka The aim of the present diploma thesis was to prove the habitation of brook lamprey near Dolní Dvořiště. Biotopes with habitat preferences of brook lamprey were described. During the ichtological investigation of the catchment area of the Malše river in the years 2007 - 2008, brook lamprey was successfully located on sites in Dolní Dvořiště and near Všeměřický quarry. The sites had the same character as trout streams. Length -frequency distribution of the brook lamprey larvae was executed. The species assemblage of ichtofauna of the sites with brook lamprey habitation was described. In the years 2008-2009 other possible biotopes were mapped in connection to the sites in Malše and Tichá where brook lamprey had been located before. Detailed record
	The occurrence of brook lamprey (\kur{Lampetra planeri })in the Malše River near Kplice BRABCOVÁ, Miroslava Within the frame of the ichthyological survey of the Malše River in Dolní Dvořiště and several river profiles upstream the Kaplice town the presence of brook lamprey (Lampetra planeri) was proved. In years 2007-2009 in six localities of the Malše River between Dolní Dvořiště and Kaplice town the occurrence of the species was proved. Lamprey larvae created more than 90%, catch of adult lampreys was low. In time period investigated the densities were relatively low (8 inds./m2 maximally) and were not significantly different between compared years and localities sampled. Lampreys densities were influenced by current speed and rate of shade. Physical {--} chemical parameters of water (temperature, pH, oxygen concentration, conductivity) and also water depth and thickness of sediment were in the range of optimal values in the sampled microhabitats so any correlations between these parameters and densities of lampreys were not observed. Detailed record

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