Marked pike in the Bodden of Mecklenburg-Vorpommern
Do pike migrate between the individual lagoons (also called 'Bodden') and if so, how far actually? How fast do individual pike grow? And where are the most important spawning grounds?
To find answers to these and other questions, scientists of the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) have been catching pike in the various Bodden around Rügen since February 2020 as part of the BODDENHECHT research project. The research team is supported by Bodden fishers and angling guides from the region. The fish are marked after the catch and released again.
Pike are currently marked and released in the following areas:
Greifswalder Bodden, lagoons between Hiddensee and Rügen, lagoons of nothern Rügen, Peenestrom and in the rivers Peene and Barthe.
However, the fish can appear everywhere, also in the freshwater inflows.
Marked and equipped with transmitters
Externally, the fish are marked with a thin, colored (white or orange) tag. The tag is inserted into the fin rays below the dorsal fin. The Internet address www.boddenhecht-forschung.de, information about the catch/report reward and an individual pike number (ID) are found on it.
Some pike are additionally equipped with an electronic tracking device/transmitter, which is either invisibly placed in the abdominal cavity or visible from the outside.
Three types of marked pike can be distinguished:
- Pike with an orange tag below the dorsal fin (without tracking device/transmitter).
- Pike with a white tag and an electronic transmitter in the abdominal cavity, not visible from the outside.
- Pike with a white tag and an externally visible electronic transmitter at the back of the fish.
What to do with a marked pike?
If you as a fisher, angler or wholesaler catch or see a marked pike, please report it back to us, ideally together with information about the pike number (ID on tag), catch date, fishing location, fishing gear & fish length.
You can harvest the pike, if it is larger than the minimum length limit and caught outside the closed season, as usual. However, you can also release it for scientific reasons, because scientists can also draw conclusions about migration and growth from the recaptures.
Especially for fish with white tags the release is very welcome, because the fish carry expensive transmitters.
Please leave the orange or white tag on the fish if you release it.
If you harvest the pike or if it dies, please send the electronic tracking device/transmitter back to us.
There are two possibilities:
Reminder: If possible, release pike with internal transmitter (recognizable by a white tag, but no externally visible tracking device/transmitter). If you harvest the fish or it is dead, please remove the transmitter from the abdominal cavity and return it by mail. If possible, please freeze the head (or the whole fish) and give it to the researchers. Just give us a call and we will discuss the pickup.
- Always remove and return externally mounted electronic transmitters from the pike, even if the pike is released.
All first reported catches of pike with white tags (pike with tracking devices/transmitters) receive a reward of 100 Euro. All reported first catches of pike with orange tags will either receive a cash prize or, together with all reports of recaptures, will be entered into a draw for material prizes worth 500 Euro per prize.
The research team will inform you after the report whether or not the fish is a recapture.
Of course your reports will be evaluated anonymously and will never be associated with you as a person. Also we will never associate your name with fishing locations – data protection is very important to us!
Caught a pike with a transmitter?
Please get in touch with us:
phone: +49 (0) 160 944 78 446
Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
12587 Berlin / Germany