Author/Authors :
Enyidi، U.D نويسنده Department of Biological and Environmental Science, P.O. Box 35, FIN-40014, University of Jyv?skyl?, Finland , , Pirhonen، J نويسنده Department of Biological and Environmental Science, P.O. Box 35, FIN-40014, University of Jyv?skyl?, Finland , , Vielma، J نويسنده Finnish Game and Fisheries Research Institute, Jyv?skyl? Game and Fisheries Research, Survontie 9, FIN-40500, Jyvaskyla, Finland ,
