One year has gone by since the restauration of Klingavälsån, and two years for Fyleån, and we are now trying to find out how our cultured juvenile mussels (Unio crassus) respond to their new environment. This year a new method, Whitlock-Ö-boxes (2016) has been developed to test this. The Whitlock-Ö-box (2016) is a box constructed with holes in the walls so that water can flow thru it. Inside the box tubes with mussels have been placed and fixed. The tubes contain holes in the wall covered with a 200 um net, so that water can run through and the mussels stay inside. The box itself is attached to an iron stick at the bottom of the river. Every week the boxes are collected and brought back to the lab at the Hemmestorps Mill where survival rates are examined. The results so far are encouraging and the juveniles seem to like their new environment.
/ Tina, Valentina och Martin