21.10.2021

Angler meldet gechipPten Barsch aus der Ruhr

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Foto: Stefan Ludwig

Ein mit der Angel gefangener Barsch (perca fluviatilis) aus der Ruhr sorgte für eine Überraschung. In der Küche fand Fänger Markus Willmann einen Sender in dem Fisch.

Pit Tag Barsch Schnitt

Foto: Markus Willmann

Glücklicherweise meldete er den Fisch, so dass es uns möglich war, das wissenschaftliche Projekt ausfindig zu machen, welches den Fisch markiert hatte. 

Sehr wahrscheinlich wurde der Fisch in der Nähe im Rahmen eines Untersuchungsprojektes für einen Fischpass am Baldeneysee bei Essen markiert. Dort wird der installierte Fischlift auf Funktionsfähigkeit geprüft.

 

Fischlift Ruhr

 Grafik Quelle: Innovatives in Essen - Essen-Werden (lokalkompass.de) am 19.10.2021

 

 

   

 

20.10.2021

fish upstream migration at geesthacht/river elbe still limited

DJI 0732 20 

The upstream migration situation for fish is still limited. Please find the video showing the situation July 2021 here....

 

 

  

29.07.2021

Arte: Angler against net fishermen - salmon restocking in france

 

Lachs Netz

A German/French TV documentation shows the difficulties with restocking Atlantic Salmon in Rivers in the French Pyrenees.

Please find the documentation here...

 

 

       

10.07.2021

BR Program shows: Eco hydropower can't answer claim of fishfriendliness

WKA Luft 

A report of Bavarian Broadcasting (BR) shows that hydropower stations in rivers having been built with a special focus on fish protection are if at all less harmful but never at all fish friendly. The report presents the results of a scientific investigation of the Technical University of Munich (TUM) in a compact and concise manner on one out of nine hydropower stations that were supposed to be specially fish friendly. Please find the report here... 

 

 

       

05.07.2021

new findings: Salmon migrate longer distances At Sea

Pop up tagged Kelt

photo above: Salmon Kelt (Salmon after spawning returning to the Sea) equipped with a Popup-Tag  - photo: Audun Rikardsen audunrikardsen.com 

A current scientific study shows that Atlantic Salmon migrate longer distances at Sea than assumed so far. 204 Salmon from Norway, Denmark, Ireland, Spain and Greenland have been equipped with so called "Popup-Tag's" after spawning in the period from 2008 to 2014. These tags record the migration route of the fish and detach from the fish after a certain time. After surfacing they send the recorded data to a satellite.  148 individual fish that were tagged in this way delivered data for the study.

 

Verteilungskarte

grafic above: Migration Routes of different Salmon stocks in the Atlantic - Source: Redefining the oceanic distribution of Atlantic salmon | Scientific Reports (nature.com)j

While Spanish and Irish Salmon moved to rather southernly areas of the Atlantic the Salmon of Danish Rivers swam up to Greenland and even further North in the vicinity of Barents Sea. There are areas at the east coast of Greenland where different stocks swim together at certain seasons (mixed stocks).

Further interesting information about individual migrations, seasonal migrations and climatic influencing factors can be found here:  Redefining the oceanic distribution of Atlantic salmon | Scientific Reports (nature.com)

The technique being used for this complex exploration described vividly in the following graphics: 

overview 

 

Source: (2) (PDF) The Use of Electronic Tags in Fish Research–An Overview of Fish Telemetry Methods (researchgate.net)

 

 

          

     

30.06.2021

survey on distribution of pink Salmon

Buckellachs laichbereit

photo above: male Pink Salmon ready to spawn

In 2017 an increasing number of Pink Salmon (Oncorhynchus gorbuscha) were caught in the North Atlantic and partly also in Germany. This Pacific salmon specieshas been set out in the fifties in the area of the Kola peninsula in Northern Russia.  It is still unkown why this species starts to spread along the entire European Atlantic coast since 2017.  A scientific study should help to answer this question.

If you catch a pink salmon in European water, please report to:

Dr. Marko Freese
Thünen Institute of Fisheries Ecology
Biodiversity and Migratory Fishes 
Herwigstraße 31, 
27572 Bremerhaven 
Germany
 
Tel.: 0471/ 94460-131
Fax: 0471/94460-199
This email address is being protected from spambots. You need JavaScript enabled to view it.
 
Frozen as a complete fish would also be helpful for the investigation. Mr. Freese would take care of transport.
 
Early Season
 
 
Mid Season
 
 
Schwanz
 
 
Rachen
 
 
 
 
  

 

26.02.2021

Elbefische werden in Geesthacht aufgehalten P6160047

Bild oben: Aktuell ist der Fischpass am Südufer für Fische gesperrt

Seit dem Spätsommer 2019 ist die Fischwanderung deutlich verschlechtert. Grund dafür ist das die Wehranlage die auch für den Straßenverkehr genutzt wird derart gravierende Mängel aufweist das weitreichende Sicherungsmaßnahemen ergriffen werden mussten.  Diese Maßnahmen hahen dazu geführt dass der Fischpass am linken Ufer verfüllt wurde, also für die Fischwanderung komplett ausfällt. Der rechte Fischpass  wurde zunächst seiner Lockströmung beraubt und später behelfsmässig durch eine Rohrinstallation wieder installiert.

DSC00003

Bild oben: So sah es vor der Verfüllung am Südufer für Fische aus.

Ein tiefer gehende Präsentation zu dem Thema finden Sie hier.

24.02.2021

„Wasserwerke töten Fische!“ 

... headlined Sundays BILD live news channel meaning hydropower stations in rivers kill fish.

Our video about the Eel issue at Meinersen hydropower station found its way over the German Angling Associoation (DAFV) right into Sundays live program of BILD directly after we had published it on our YouTube Channel.

Showing parts of the mentioned video Stefan Ludwig of "Wanderfische ohne Grenzen" gave a live interview about the issue.

Please find a recording of the program  here .

 

DSC02350 klein

 

 

 

19.02.2021

"STOP shredding millions of fish!"

...headlines the German "BILD-Zeitung" today.

What happens regularily at the hydropower station in Meinersen has its share in this.

Reason for the article is a press release of the DAFV (German Angling Association) that is currently being prepared and takes a clear stance on hydropower.

Please take a look at the online article:

Anglerverband: „Stoppt das Schreddern von Millionen Fischen!“ - News Inland - Bild.de

 

Aale DAFV

Source: DAFV Press Release

 

10.02.2021

Hydropower Station at Meinersen turns into deadly eel-trap again

PFNX1184

Hydropower Stations in rivers are very often responsible for massive damages done to fishes.

Fish species being dependent on migration to complete their life cycles are theratened or even extinct. 

The reasons will be shown here in a series of short videoclips.

This clip here about a hydropower station at Meinersen on River Oker in Lower Saxony shows what happens unfortunately all the time when European Eel start their journey to their spawning habitats in the Sargasso Sea at the Gulf of Mexico: Even before the journey has really started, it is stopped here at this migration obstacle and many eel end up as flotsam in the container of the grid cleaning device. On the way to the Sea there are many hydropower stations... Please see the video here...

 

DJI 0442

A lot of the water has been led over the weir but that didn't prevent the Eels to take their way into the hydropower station.

On 5.2.2021 again eel were trapped in the dead end hydropower following the high water levels. At very high water levels eel gathered as often before in front of the grid of the hydropower station.  This happend although a lot of water was channeled around the hydropower station.

The bypass directly at the grid has not been supplied with water. So the eels were pressed against the grid again and again.

IMG 0490

Bypass pipe on 5.2.2021 without water and therefore useless!