Both? The salmon along shipping routes or around them seems to be most at risk but it is also the most accessible https://www.asf.ca/about-atlantic-salmon/state-of-populations The northern salmon populations are healthiest but they are also furthest from population centers. In general, there is still too much atlantic salmon fishing. Canada is still assessing long term strategies for salmon population protection.
I’ve always heard that wild caught has a less harmful impact on the environment than farm-raised.
Different sure but they both have environmental impacts, wild salmon is extinct in some places already
Is that due to overfishing or other things such as loss of habitat by obstructing their spawning routes?
Both? The salmon along shipping routes or around them seems to be most at risk but it is also the most accessible https://www.asf.ca/about-atlantic-salmon/state-of-populations The northern salmon populations are healthiest but they are also furthest from population centers. In general, there is still too much atlantic salmon fishing. Canada is still assessing long term strategies for salmon population protection.