Indian Journal of Science and Technology

Hliwa P.^*,Krejszeff S.^†, Król J.^*, Kozłowski K.^‡,Gomułka P.^*

^* Department of Ichthyology, University of Warmia and Mazury in Olsztyn, OczapowskiegoSt. 5, 10-719 Olsztyn, Poland, Fax: +48 89 5233754, e-mail: [email protected]
^† Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Poland
^‡ Department of Fish Biology and Pisciculture, University of Warmia and Mazury in Olsztyn, Poland