10.18453/rosdok_id00002874 Dańko, Aleksandra Aleksandra Dańko http://d-nb.info/gnd/1224420535 Universität Rostock 2019 570 Life science 590 Zoological sciences 2019 en http://purl.uni-rostock.de/rosdok/id00002874 urn:nbn:de:gbv:28-rosdok_id00002874-5 The life cycle of Eleutheria dichotoma includes medusae and colonial polyps. Medusae reproduce both sexually and asexually, which allows them to adapt their reproductive strategy to environmental conditions. The study examined the role of salinity, temperature and population density in reproduction and survival of medusae and polyps. I have shown, among other things, that medusae increase asexual reproduction under favourable conditions and sexual reproduction under unfavourable conditions, and that polyps are more resistant than medusae and can serve as a reservoir of genet.