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Fifteen new localities of the Ukrainian brook lamprey, Lampetra (Eudontomyzon) mariae, were found within 2008–2010. The majority of them are located in the Nida River drainage. Additionally, the occurrence of that species in the Strwiąż River, a tributary of the Dniester, was confirmed. The cluster analysis performed suggests, that L. mariae exhibits strong affinity to the stone loach, Barbatula barbatula,...
Recent molecular research indicates that several distinct species have been confused under the name Gobio gobio (L.); thus, comparative investigations of numerous local populations are urgently needed. The present study presents and discusses detailed morphometric characteristics of 82 individuals from the G. gobio complex of nine tributaries of the upper Vistula River (southeast Poland) within the...
In October 2007 an invasive alien species, the Chinese sleeper, Perccottus glenii Dybowski, 1877 (known also as the Amur sleeper), was recorded in carp ponds in Kraków-Mydlniki (southern part of Vistula River drainage). As far as we know, this is the uppermost site in the Polish part of the Vistula River drainage. Thirty-six individuals of P. glenii were collected during fishery works. Basic morphometric...
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