This thread seems to be getting a bit off-track. That being said, it should be noted that in the natural course of things sea lions eat very little salmon. Salmon are fast, hard to catch and bottom fish are easier. Sea lions can catch a lot of salmon only when humans put barriers in the way of salmon migration. Barriers such as dams or nets.

Sea lions are intelligent and adaptable, that goes with being a large predator. They will feed from any source they can find. For humans to argue about what is "natural" for a sea lion and then insist that the sea lions confine themselves to just that behavior is a bit silly!

I like salmon and sea lions and am not really sure what I would like to see done. One thought does intrude; if we were so concerned about the survial of salmon we would not have built the dams in the first place.