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Revitalization of the Morava River vs. business plans
Halačka, Karel ; Mendel, Jan ; Papoušek, Ivo ; Vetešník, Lukáš
The course of the Morava River is an important supranational biocorridor with significant biological potential. This is attested also by results of recent ichthyological surveys. There is a plan of revitalization projects aimed at making migration barriers passable and also at repatriation of indigenous animal species. At the same time, there is a number of business plans focusing on the area, while their realization would severely restrain or even disallow the revitalization efforts. Therefore, a complex biological survey of the whole Morava River course should be performed first, and a detail project of naturalization of the floodplain, including the still existing fragments of original river channel, should be elaborated subsequently. Such project would then constitute a qualified basis for centrally assessed potential business plans.
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The latest findings concerning the species diversity of gudgeon of the genera Gobio and Romanogobio in the territory of the Czech Republic and Slovakia
Mendel, Jan ; Lusk, Stanislav ; Lusková, Věra ; Koščo, J. ; Vetešník, Lukáš ; Halačka, Karel
During last 15 years the taxonomy of gudgeon have undergone extensive changes. The findings important for preservation of ichthyofauna of the Czech Republic and Slovakia include confirmation of generic differentiation of the original genus Gobio into two genera Gobio and Romanogobio. On the basis of genetic analyses, the originally accepted uniform structure of the species Gobio gobio was divided into the structures which can be assigned the level of species (G. gobio, G. obtusirostris, G. carpathicus, Gobio sp.). The original R. albipinnatus can be divided into the species R. vladykovi and R. belingi. The original species R. kesslerii can be divided into R. banaticus and apparently also Romanogobio sp. With regard to newly acquired knowledge it is necessary to revise the system of efficient preservation of the biodiversity found in the above mentioned taxa. The areas of sympatric occurrence of some species were localized and hybridization within both the genera was demonstrated.
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Occurence of Gobio kesslerii Dybowski, 1862 in the River Morava
Merta, L. ; Lusk, Stanislav
Gobio kesslerii is among the rare species in the ichthyofauna of the Czech Republic. Until recently, this species has been only know to occur in the River Bečvy (a tributary to the Morava River). In the autumn of 2003, numerous G. kesslerii were ascertained in the River Morava between the mouth of the r. Bečva (r.km 210.7) up to the weir at Bolelouc (r.km 221.04).
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