Glâne river is an iconic river that winds through the Fribourg countryside of some 35 km, before emptying into the Sarine river just upstream of Fribourg. Over time, this stream has undergone many “corrections” making it impossible for fish to migrate and certain artificial sectors hinder adequate ecological cycles for many species.
As part of the revitalization efforts, undertaken by the canton of Fribourg, several areas of the river will be merged and the fish migration restored in order to improve the ecological status of the Glâne.
Hepia and La Maison de la Rivière have been mandated to carry out a study to analyse the spatial diversity of fish across the line (baseline) and to study the behaviour of fish fingerlings from the hatchery that were introduced into the natural environment.
To answer these questions, electric fishing took place in the summer of 2015 and PIT-tag marking was performed on all the fishes that were put back in the fishery management areas.
The results of this project over a three-year period (2015- 2017) will allow a better understanding the population dynamics and effects of restocking the Glâne, as to adjust future revitalization measures.