There are many habitat models that defined available spawning area and WDFW does not even meet those. I think that Salmo noted that management aims at MSY, which is a purely economic model. What is the minimum investment for maximum return. It ignores ecosystem needs whether it is salmon feeding the system through carcasses or other beasts eating salmon. Most folks are unwilling to share salmon; the predators can have the scraps we can't catch/kill. See arguments to control seals, sea lions, cormorants, terns, wolves, bears, cougars. I get mine first.