Comparison of the Genetic Structure of Invasive Bigheaded Carp ( spp.) Populations in Central-European Lacustrine and Riverine Habitats.

Bigheaded carps (bighead carp, , and silver carp, ) and their hybrids play an important ecological and economic role in their original habitat, while their introduced stocks may pose serious ecological risks. To address questions about the persistence and invasiveness of these fish, we need to better understand their population structures. The genetic structures of bigheaded carp populations inhabiting Lake Balaton and the Tisza River were examined with ten microsatellite markers and a mitochondrial DNA marker (COI).

Genetic consequences of pond production of a pikeperch ( L.) stock with natural origin: the effects of changed selection pressure and reduced population size.

The pikeperch ( L.) possesses great potential for diversifying European aquaculture. However, studies on the genetic risk of stocking natural waters with farmed individuals of this species have been limited.

Diet of otters (Lutra lutra) in various habitat types in the Pannonian biogeographical region compared to other regions of Europe.

Knowledge of the effect of habitat type and region on diet and feeding behaviours of a species facilitates a better understanding of factors impacting populations, which contributes to effective conservation management. Using spraint analysis and relative frequency of occurrence data from the literature, we described the dietary patterns of Eurasian otters (Lutra lutra) in 23 study sites within the Pannonian biogeographical region in Hungary. Our results indicated that diet composition varied by habitat type and is therefore context dependant.