For more information about fish migration in rivers - Vaki
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For more information about fish migration in rivers

Great interest on better river stock management
VAKI has recently held two seminars, one in Koblenz, Germany and the other at Gardermoen in Norway.
The focus of the seminars was the equipment for monitoring of fish migration in rivers. These seminars showed a great interest on that topic, especially in today’s society where there is an ongoing demand of actual knowledge about the condition of rivers and waterways.


The seminars gathered nearly 50 participants from 10 different countries. Authorities, energy developers, research institutions and riverside owners were amongst participants. VAKI introduced different examples of applications for Riverwatcher and it was also presented solutions to fit different types of rivers and waterways.

Lectures holders Mats Hebrand (Fiskevårdsteknik), Benedikt Hálfdanarson (VAKI) and Magnús Þór Ásgeirsson (VAKI) presented several examples of how the equipment can be custom tailored to fit every single river and users' information needs. Today the Riverwatcher is in use in more than 300 rivers worldwide and the variety on river types and monitoring strategy is vast. Common to all systems is that with a relatively small effort and investment you get much enhanced and documented knowledge of the condition in each river such as: population, fish size, spawning and development over time are the key data.

Mr. Hebrand showed numerous examples of various plants and monitoring strategies, he said that there are rivers that monitor more than 30 different species, whereas the typical salmon rivers like to concentrate on two or three species.
Via Skype held Ryan Cutbert (FISHBIO) a presentation about their use of the Riverwatcher in combination with own developed and removable fish ways. This equipment has been in use for nearly ten years in California and is ideal for relatively shallow rivers where you do not want to make lasting impact on the landscape.

Mr. Ásgeirsson talked about future plans for a Web-based solution and a Riverwatcher application where you can make information available to a wide audience. In conclusion told Jon Museth from NINA about the situation they have in Glomma waterway and the need they have for passive monitoring methods over the traditional method with traps and physical measurement of the fish. He believed that the information one can obtain from such methods are imperfect and that it is questionable whether the value of the traps can be justified from a fish welfare point of view.

The lectures and discussions along the way created great interest and commitment from the seminar participants, says Mr. Larsen, who consider both the seminars as very successful.

VAKI looks forward to seeing you at the next Seminar.
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