Affiliation: | (1) Freshwater Biological Laboratory, University of Copenhagen, 51 Helsingørsgade, DK-3400 Hillerød, Denmark;(2) Centro de Estudios Avanzados de Blanes, CSIC, Camí de Sta. Bárbara s/n, 17300 Blanes, Girona, Spain;(3) Departement of Life Sciences and Chemistry, University of Roskilde, P.O. Box 260, DK 4000 Roskilde, Denmark |