Dry weights of the zooplankton of Lake Mikri Prespa (Macedonia, Greece)

Length-weight regressions and dry weight estimates of the main crustaceans of Lake Mikri Prespa are presented. The calanoid copepod and most of the cladocerans were heavier during summer than in other seasons, while the rest of the crustaceans were heavier during spring. The mean calculated dry weights were : (a) 0.005 mu g (Keratella cochlearis), 2.268 mu g (Asplanchna priodonta), 0.033 mu g (Trichocerca capucina), 0.024 mu g (Filinia longiseta) for the predominant rotifer species; and (b) 0.420 mu g for the planktonic larvae of the molluscan Dreissena polymorpha.