I don't see one biggest risk. I see multiple risks.
Of course, we're facing climate change, and with the warming waters and the distance, the size of the fish that are coming back are not the same as they used to be, therefore they are not producing the number of eggs that they have, historically. We are in the process of needing more fish to get to the spawning grounds.
Another one that I really feel we need to address is the number of hatchery fish from pink and chum that are being released into the Bering Sea and the ocean. The trawlers are a huge component of that.
Then, of course, on the Canadian side they are facing—because it's the longest migration—the barrier of the Whitehorse Rapids generating station or hydro plant, which has an inefficient ladder. They're also facing juvenile mortality on the out-migration.
There's not just one. There are multiple. I'm sorry that I couldn't give you one.