Salmon escape traced back to farm thanks to DNA sampling
Under Current News, 7 July 2014
Researchers in Norway have successfully identified the farm at the cause of an escape of farmed salmon last autumn, by analyzing DNA samples from the escaped fish.
The researchers, from the Institute of Marine Research, had been asked by the Fisheries Directorate to find out the farm from which salmon had escaped in November 2013 in the commune of Ryfylke.
The escape had not been reported by any of the farms in the commune.
Information from 11 farms with nearly 90 cages that had fish of 1 to 3 kilos in size in the area at the time showed that the fish came from 11 smolt groups, which were all sampled.
Using DNA samples from the escaped fish, IMR then established that the salmon was not from the Aquagen or Mowi breeding line, but instead from the Salmobreed family.
The tests then showed that the Kunes farm, operated by Eidesvik Laks, was the most likely primary source for the escape, while the possibility that some fish also escaped from the Sandvik farm by Erfjord Stamfiske could not be ruled out.