Fish that survive are the fish that grow faster and more quickly in the first months in the ocean. For those fish that survive the first ocean winter, there is mortality, but in general the brood-year strength is determined at the first ocean winter, based on how fast they grow in the coastal area.
With the fish that we catch, there is some overlap with U.S. fish, but in general, that's not quite true. There's chum salmon from Japan and Russia in the Gulf of Alaska, but if you're suggesting that there's competition from fish from other countries, I would say no, it doesn't exist.
By the way, we did find, through our plankton studies, that it did look like there was a lot of food available in the Gulf of Alaska, so that would not be regulating the abundance after they survive the first ocean winter.