Yearly Report of the Migratory Fish Working Group
The migratory brown trout by-catch of professional fishery rose again to 2.0 t only. The total of migratory brown trout caught by recreational fishery was 1.9 tons, which means an increase by 21% compared to the previous year. The video surveillance system in the fish ladder of the hydro-electric power plant “Reichenau” (Alpenrhein) delivered a number of 166 ascending trout only.
88 migratory brown trout were registered at the hydroelectric power plant “Hochwuhr” (Ill).
A factor analysis for the decrease of migratory brown trout during the last decade is presented (Report)