Todd ( and the rest of you who are gluttons for technical, long winded documents):

Here's a link I picked up from the "other" board regarding productivity from a wild broodstock coho program. Pretty shocking stuff!

chilcote study on coho wild broodstock program

The gist (yes, I even looked up the spelling on that one) of the document is that a wild broodstock hatchery program was being used to help recover depressed runs of lower Columbia coho. Turns out the smolt-to-adult survival of the program fish was only one-tenth of their wild counterparts. They found that mining those eggs and diverting them into a hatchery environment produced fewer returning adults than if the eggs had just been naturally seeded into the river gravel the way Mother Nature intended. When you factor in the additional cost of running the broodstock program, you really have to ask, "Is that worth it?"

Things that make you go HMMM.....