So, what you're saying is that salmon are relatively easy to catch at sea if you really wanted to?When at sea Atlantic salmon are primarily a pelagic species and spend most of their time in the top 20 feet of water so are very unlikely to be caught in trawl nets. Back in the early ‘70’s I was a summer student at what was then, the Fisheries Research Board of Canada’s science branch here in Newfoundland. I worked in the Anadromous section and spent part of two summers aboard a research vessel tagging salmon on the high seas, starting in the Davis Straits between Canada and Greenland and moving south to the north east coast of Newfoundland. We used both baited lines suspended 10 to 15 feet below the surface and drift nets, eight feet in depth and suspended from the surface. We caught and tagged lots of salmon.
I guess the point I’m trying to make here is that trawlers generally aren’t a problem, driftnetters are, particularly when they are operating outside any legal framework or negotiated agreements such as are currently in place with the Greenland fishermen. As a further point re trawlers, satellite tagging projects have shown that most grilse from Newfoundland rivers go to the Grand Banks for their one year at sea feeding but they don’t show up in catches by the numerous trawlers at work on those banks.
A final point, I’m certainly not attributing the decline in North American stocks to commercial fisheries, just noting that it’s one more nail in the coffin, along with fish farms, climate change affecting prey species and river survival, and so on. Fortunately we do have a lot of healthy rivers despite fluctuations but as time goes by they will tend to be the more remote and difficult ($$$$) ones to access.