No, to my knowledge, there are no nets for salmon or steelhead in the Great Lakes. I think an issue of equal value is the aggressive stocking programs. There are many streams in Michigan, Ontario, New York, Ohio, and Pennsylvania that have a percent of their fish being created by natural production. However, alot of the numbers come form stocking programs. Wisconsin for instance has basically no natural reproduction. Many of these rivers are playgrounds for carp, bluegills, and other warm water fish immediately after the spring steelhead run. To handle the fishing pressure, there are rivers that receive plants in excess of 100,000 fish. Couple that with return rates that can be up to 12 or 14%, and three miles of fishable river, and it's fairly easy to see why these fish are so thick. If these smolts don't get munched by a laker or chinook, they basically have it made. They just blew out a dam on the Menominee River in Milwaukee, and now there is 27 miles of river that these fish can go up before they hit a barrier. To my knowledge, that is one of the longest stretches of river that fish have to go up in Wisconsin. The PM, Grand, St Joe, etc, in Michigan are fairly lengthy, and that's probably the reason they have a more "year round" fishery than Minnesota, and Wisconsin. The Michigan rivers on the west side have lots of wooded areas that help keep the water cool, and more favorable to the fish. All in all, the steelhead fishing in the area I fish, is a "Put and Take" fishery. I don't keep very many fish at all. A fresh one for the grill a couple of times a year is enough. However, I am totally aware that the fish I am letting go, will spawn, and their eggs will never even hatch. Hope this helps.