Email updates   Open Access Research article  Strong differences
in the clonal variation of two Daphnia species from mountain
lakes affected by overwintering strategy  Eva Hamrová1, Joachim
Mergeay23 and Adam Petrusek1*  Author Affiliations  1 Department
of Ecology, Faculty of Science, Charles University in Prague,
Viničná 7, CZ-12844 Prague 2, Czech Republic  2 Laboratory of
Aquatic Ecology and Evolutionary Biology, University of Leuven,
Deberiotstraat 32, B-3000 Leuven, Belgium  3 Research Institute
for Nature and Forest, Gaverstraat 4, B-9500 Geraardsbergen,
Belgium  For all author emails, please log on.  BMC Evolutionary
Biology 2011, 11:231  doi:10.1186/1471-2148-11-231   Received:3
May 2011 Accepted:8 August 2011 Published:8 August 2011  © 2011
Hamrová et al; licensee BioMed Central Ltd.     The population
structure of cyclical parthenogens such as water fleas is
strongly influenced by the frequency of alternations between
sexual and asexual (parthenogenetic) reproduction, which may
differ among populat