Start Sampling of cyanobacteria from experimental flasks during the experiment Cyanobacterial filaments fixed and embedded in epoxy resing for observation under transmission electron microscope Cyanobacterial material prepared for observation under transmission electron microscope Cyanobacterial filament observed under transmission electron microscope Continuous culture chemostat system build for cultivation of cyanobacteria Inverted microscope used for isolation of cyanobacteria from field samples and observations of cultures Equipment used for recording of Daphnia filtration Phytotron used for cultivation of cyanobacteria Daphnia pulicaria fed with cyanobacteria and one dead egg visible inside brood chamber Equipment used during life history experiments Different stage of development of eggs inside the brood chamber of Daphnia pulicaria fed with cyanobacterial filaments Mechanical interference of cyanobacterial filaments with filtering apparatus of Daphnia pulicaria Filtering appendage of third pair of thoracic legs of Daphnia manga Fascicles formation in Aphanizomenon gracile in the presence of Daphnia exudates Acutodesmus obliquus used as a primary food for daphnids A juvenile Daphnia magna Cylindrospermopsis raciborskii growing on agar plate Planktothrix agardhii growing on agar plate Filaments of the cyanobacterium Aphanizomenon gracile Samples of cyanobacteria collected from the experiment Abnormalities in the morphology of old strain of Aphanizomenon gracile Continuous culture chemostat system build for cultivation of cyanobacteria Filaments of the cyanobacterium Aphanizomenon klebahnii Akinetes of the cyanobacterium Aphanizomenon klebahnii Filament of the cyanobacterium Planktothrix agardhii Culture flasks with cyanobacteria placed on a shaker Cultivation of cyanobacteria under different light conditions