Which factors influence spatio–temporal changes in the distribution of invasive and native species of genus Carassius?

Within the genus Carassius Jarocki, 1822 , crucian carp ( C. carassius L., 1758) occurs naturally in northern part of Middle Danube Basin (Austria, Morava, Slovakia). This species has least concern status this region, but observations last decades suggest that it is very close to extinction here. The distribution limited a small number vanishing lentic habitats (oxbow lakes, marshlands). These biotopes are stage succession due drying up landscape and reduction creation new natural alluvial habitats. non-native cyprinid, gibelio (Bloch, 1782), known as gibel Prussian carp, gradually become eudominant wide spectrum habitats/biotopes since 1960s Several biological adaptations generally considered strong basis for mass spreading invaded area. other side expansion affected by anthropic activities associated with fish farming, translocation stocking open water ecosystems. In study, we analysed historical scientific data on spp. published from 19 th century present mentioned areas. results records invasive increase rivers, regulated channels creeks, which could be pathways spreading. However, presence artificial (fishponds, reservoirs) continuous 1960s. area mentioned, managed national fisheries associations relate way farming Central Eastern European countries. To show current state fishing grounds Slovak Angling Association, created map based catches recorded two decades.