World Fish Migration Day
World Fish Migration Day in Meinersen/Niedersachsen
Wanderfische ohne Grenzen – NASF Deutschland cohosted in close cooperation with the Aller-Oker-Lachs-Gemeinschaft (AOLG) its second event in Germany on that day.
Perfect weather and a good number of visitors were ideal conditions for a successful event.
To start, Stefan Ludwig, vice chairman of NASF Deutschland and Salmon Counselor of the Aller-Oker-Lachs-Gemeinschaft explained the general idea of informational events on the World Fish Migration Day.
All around the world the problems of migratory fish species are similar.
Like the projected new erection of a hydropower station in Bannetze affects the Salmon project of the AOLG strongly, similar things happen in many places on our planet. It is the objective to inform the public about it.
The visitors showed vivid interest in the issue and found qualified answers to their numerous questions.
Stefan Ludwig then carried out public electro fishing together with the assistants of the AGV Vorsfelde, a member of the AOLG. The fishing was documented with an Action Cam.
The fishing yielded apart from Roach, Perch and Gudgeon some real migratory species: Common Barbel and European Eel!
A new experience for the seasoned electro fishing team was the visitors applause at the end of the fishing.... taking this in account one should probably repeat this kind of happenings more often!
After measuring the fish and documenting the data in the fishing protocol for the Lower-Saxony organization LAVES the fish were released well into the Oker.
Before lifting the control fish trap Hans-Jürgen Sauer and his wife Heidrun showed three short movies about Migratory Fishes, Atlantic Salmon and Migration in the project area of the AOLG.
Stefan Ludwig explained the history of the building of the control station and pointed out that such a possibility to monitor the functionality of a fish pass can only be rarely found in Lower Saxony. So there is little possibility to make reliable statements about the quality of a fish migration aid.
Hans-Jürgen Sauer pointed out that without the help and dedication of sponsors the implementation of this function control would not have been possible. The committed members of the AOLG are bringing life to the institution and have carried out function controls in several years for a period of several weeks every time. So it is now possible to make a statement about the functionality of the installation in different years at different water levels and temperatures.
Fish in rivers and streams need apart from clean water mainly the permeability of the watercourse for reproduction and growth.
Although biological permeability of most of the obstacles in the Oker has been improved by building fish passes over the last years, the “Petri Wehr” in Braunschweig is still blocking the migratory route between “Harz” and “Heide” for the fish!
Around the World more than 450 events for Migratory Fish Species have taken place on this 21st of May 2016.
http://www.worldfishmigrationday.com/events
Wolfsburg den 24. Mai 2016
Stefan Ludwig
Wanderfische Ohne Grenzen - NASF Deutschland
