Evaluation of movement patterns and habitat preferences of nase in the Vienna River
Abstract
The Vienna River, is the most important Danube tributary in the area of the city of Vienna. The originally winding and branched course of the river, as well as its proximity to the Danube, suggests that the biodiversity of the fish fauna of the Vienna River was characterized by the migration of many fish species (e.g. for spawning) from the Danube. For example, cyprinid fish such as the nase (Chondrostoma nasus), a typical Danube fish species, enriched the species diversity. In the course of climate change, a more extensive shift in the fish region must be expected. Cyprinid fish such as the nase will expand further and further into the upper reaches, pushing back cold-water-loving fish such as the brown trout. However, even now, the seasonal water temperature pattern of the Vienna River resembles that of barbel-region rivers. However, the nase is completely absent in the Vienna River, although there are attractive habitats with high fish ecological importance in the area near Auhof. Thus, it can be assumed that several migration obstacles in the Vienna River are the main reasons why typical Danube fish species like the nase are not found in the Vienna River today, although the climate-induced shift of fish regions would favor their dispersal. However, if medium-distance migrants like the nase could ascend into the Vienna River near Auhof, they would in any case encounter a potentially suitable habitat. However, it is currently unclear whether the nase would spawn in the Vienna River and become established there in the longer term. Thus, this project aims at investigating how the nase behaves when transported across the transverse structures near the Urania into the Vienna River at Auhof. The two central research questions are: (1) Do nase find suitable spawning sites in the Vienna River? (2) Does the nase find suitable shelters in the Vienna River (after spawning) or does it migrate back into the Danube?
keywords connectivity fish habitat migration
Publikationen
Project staff
Daniel S. Hayes
Dr. Daniel S. Hayes
daniel.hayes@boku.ac.at
Tel: +43 1 47654-81223
Project Leader
01.01.2021 - 30.04.2023
Michael Grohmann
Michael Grohmann MSc.
michael.grohmann@boku.ac.at
Project Staff
01.01.2021 - 30.04.2023
Bernhard Zeiringer
Dipl.-Ing. Bernhard Zeiringer
bernhard.zeiringer@boku.ac.at
Tel: +43 1 47654-81215
Project Staff
01.01.2021 - 30.04.2023
Kurt Pinter
DDipl.Ing. Dr. Kurt Pinter
kurt.pinter@boku.ac.at
Tel: +43 1 47654-81235
Sub Projectleader
01.01.2021 - 30.04.2023