1. Norwegian Institute for Agricultural and Environmental Research, Bioforsk Nord Holt, Box 2284, N-9269 Tromsø, Norway
2. Department of Biology, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway
3. Department of Biology, University of Oulu, POB 3000, FIN-90014 Oulu, Finland
4. Department of Arctic and Marine Biology, University of Tromsø, N-9037 Tromsø, Norway
5. Wine Research Centre, University of Nova Gorica, Vipavska 11c, SI-5270 Ajdovščina, Slovenia