Mechanical open/close mechanism barrier
Berlevåg Jeger- og fiskerforening (BJFF)
Automated sorting mechanism
Mechanical open/close mechanism barrier
Berlevåg Jeger- og fiskerforening (BJFF)
Good local investigation of the environment, water current, water depth, angle of the river bottom, available light, power and internet connection are all factors that will impact the solution. Using durable environmentally friendly material and using companies with previous experience dealing with live fish in under water installations is helpful.
In short, a mechanical open/close mechanism will sort the fish that pass the barrier and lock. Local salmon and sea trout can pass unhindered, while humpback salmon and farmed salmon are stopped and sorted out to a barrier where it can be removed and potentially processed.
Installing such a solution requires good planning and skilled engineers. Working in a strong water current is demanding and requires expertise and equipment. Securing the installation to the rived bottom is vital, as you cannot have movement that can introduce small unwanted openings the fish can swim though. We have also learned that it is better to send all unrecognized fish into the tank for manual sorting, than having unwanted species getting up river to spawn.