My thought on hatchery programs is they should only use the genetic stocks from the rivers they are planting to bolster wild fish and allow a certain amount of fish to be harvested. By using native genetic stocks if they intermingle with gravel fish no cross breeding will occur. The fittest will return to keep the genes going. Unfortunatley the enviros feel if it doesn't come from the gravel its not worthy of reproducing.

I feel that is a very narrow minded view on things. If as little as 10 more fish return to gravel because of hatchery fish that use native stocks that is an improvement.

The big key here is to only use the genetic stocks that come from the river.