On 1 April 2026, a meeting was held at the Große Mühl River (Austria) with the participation of FROV JU (Szydłowska, Burič, Císař, Koliada) and BOKU (Hauer). The aim was to visit grayling (Thymallus thymallus) spawning sites and to plan the installation of a camera system for monitoring spawning grounds, including the assessment of the signal crayfish (Pacifastacus leniusculus), which may disturb spawning habitats and threaten eggs through direct predation, as documented in salmonid species.
The discussion also included planning of further research, including the possible installation of an automated fish pass monitoring system capable of determining the number and species of migrating fish using camera-based machine learning.
The activities were carried out within the project ATCZ00180 Living Treasures / Živé poklady bystřin a tůní (INTERREG Austria–Czech Republic 2021–2027).
