[Pavel Chaloupka]

I thought the paper could be interesting in some general stuff, like the mass cultivation in waste waters and factors that will most likely limit or stop asexual reproduction mainly. My Moina is most very likely either M.macrocopa or M.brachiata according to the typical pudlle occurance and the altitude of the locality. There are 5 species of Moina in Czech Republic but only these two reach this high population densities and occure in such environments. Other 3 are typical pond species.