The Johnsbach is used for the entire length of the otter. It is not an occasional occurrence of wandering individuals, but an established occurrence that extends to Enns and Johnsbach. However, the area is so small that the area of a single otter extends beyond that. It can be assumed that the Johnsbach is used regularly by two adult otters, occasionally also by additional young otters or half-growths.
The frequency of detection across the Enns river basin has increased significantly since 1999 (27 % in 1999, 44 % in 2003, 78 % in 2006). From this it can be concluded that the otter stock is growing, even in the present Natura m2000 area.
The Natura 2000 area was divided into five water morphologically and ecologically justified subsections and analysed the habitat functions of food, day rests, boy rearing, permeability and safety.
The range from the mouth to the Enns to Johnsbach (tunnel) is to be assessed as suboptimal in terms of food, in terms of daytime hideouts as good, in terms of young rearing as unsuitable (food shortage); this section does not have serious anthropogenic hazard points or significant barriers that could hinder Otter in reaching other sections of the route.
The range from Johnsbach (Tunnel) to the end of the valley is to be described as mediocre in terms of food and in terms of daytime hideouts as good. This area is obviously also used as a young breeding area. Conflicts with humans may occur in various fish ponds; furthermore, a bridge in the village of Johnsbach is considered problematic (car accident risk). This route also has no significant obstacles to hiking.
The living conditions for the otter can be improved through the food supply. The elimination of migration barriers for fish is of particular importance. The resettlement of Coppe and Noble Cancer as well as the conservation and promotion of amphibian deposits would be desirable.
It is recommended to monitor the otter stock through regular checks of bridges for otter indications; this could also indicate the evolution of otter stock in neighbouring Enns, where otters can be less easily monitored due to the lack of suitable bridges.
In the event of damage caused by otters to fish ponds in the Johnsbach Valley, the affected pond hosts must be helped immediately so that there is no conflict scaling. If existing ponds need to be fenced for fish otters in order to prevent damage to fish stocking, replacement still waters should be created.
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