About this article
Published Online: Apr 08, 2010
Page range: 161 - 169
DOI: https://doi.org/10.2478/v10009-010-0015-7
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Kwandrans, Janina
Department of Freshwater Biology PAS, Institute of Nature ConservationKraków, Poland
Eloranta, Pertti
Department of Biological and Environmental Sciences, University of HelsinkiFinland