The question does farmed salmon affect wild salmon, answer Yes

At AquaNor for the first time it has been shown that farmed salmon escapes do actually impact on the wild populations. It has now been proven scientifically with studies being carried out all along the Norwegian coastline. 21 salmon rivers were monitored and it was shown that in at least six there was an impact via the farmed salmon.

The researchers believe this is partly due to the fact that both the farmed and wild salmon were competing for the same spawning ground and resources. Out of the 21 rivers 15 showed no genetic variation in the wild salmon populations. Read more ...

This blog is written by Martin Little, The Aquaculturists, published and supported by the International Aquafeed Magazine from Perendale Publishers