J.H Best1, S Pflugmacher2, C Wiegand2, F.B Eddy1, J.S Metcalf1, G.A Codd1
1Division of Applied and Environmental Biology, School of Life Sciences, University of Dundee, Dundee DD1 4HN, UK
2Institute of Freshwater Ecology and Inland Fisheries, Mueggelseedamm 310, 12587 Berlin, Germany