The study is conducted by Sportfiskarna together with SLU, the Department of Wildlife, Fish and Environmental Studies, and the labelling started in March. The transmitters have about four years of battery life and information is refueled once a year.
– All information is relevant. As it is now, the management is focused on char and trout, so the pike has not been done so much with, says Henrik Olsson, project manager at Sportfiskarna in Jönköping.
20 pikes get tagged
Ten pike have been tagged in northern Lake Vättern and ten in the southern part, where most of those marked are over 90 centimeres long.
"The longest we've noticed is a full 122 centimetres, so it's going to be exciting to follow it," says Henrik Olsson.
The transmitters send sound signals to a network of receivers in the lake that the County Administrative Board in Jönköping has fixed.
In the clip you hear why it is important to see how pike in Lake Vättern live.