Oncorhynchus mykiss is among the most extensively farmed fish species globally and simultaneously ranks as one of the most invasive aquatic taxa. Despite its non-native status in Europe, it remains a valued species in recreational fisheries and is frequently used to supplement streams with declining native Salmo trutta populations. In Slovakia, the presence of O. mykiss dates back to the late nineteenth century, with historica...

Migration patterns and habitat use of adult barbel ( Barbus barbus ) and nase ( Chondrostoma nasus ) were monitored by radio telemetry over a period of 13 months along a 58-km-long section of the Austrian part of the Danube River. The study site is confined upstream and downstream by two hydropower plants, and contains a larger tributary, the Pielach River. Telemetry transmitters were implanted into fish caught in this tributa...

The first evidence of proliferative kidney disease ( PKD ) in an Austrian river (the River Kamp) was documented in 2016, and no information on the PKD infection status of trout in other rivers was available. Since then, brown trout ( Salmo trutta fario ) and rainbow trout ( Oncorhynchus mykiss ) have been collected from rivers in Upper and Lower Austria for different diagnostic purposes. In this study, we summarize the recent...