They are sockeye native to Baker Lake. They use spawning beaches and artificial incubation. Salmo probably has better details, but they try to distribute the run at the spawning beaches and hatchery to mimic natural run timing. This probably results in more fish not "taken", but I think the surplus is either harvested or put in the lake. So basically, the egg take, or distribution of adults to the spawning beaches can't be met until the end of the human made run timing bell curve.