Since the hatchery program was considered a "conservation program," the hatchery fish carried coded wire tags but adipose fins were not clipped so they could be released in selective fisheries. You would have to run them through a tag detector or use a wand to find out if they are hatchery fish or not. However, since the latest stock composition I could find indicated that 96% of the adult returns (BY 2009 & 2010) were hatchery-origin, I'm going to guess that they are hatchery fish.