Apparently it hasn’t been done but why haven’t all hatcheries converted to native stock? Not only that but once a native stock is established in a watershed the clipped fish should be thrown back while anglers bring in unclipped fish to the hatchery to keep genetics different. Some kind of cap could be applied to see if runs grow. Did the Snyder creek program use clipped or unclipped fish? Also maybe try spawning the fish as they come in rather than all at once so the timings are different? Just some questions/thoughts I have.