MetalHead Ron,

A quick look at some of my notes brought this one to my attention...

"Relationship between natural productivity and the frequency of wild fish in mixed spawning populations of wild and hatchery steelhead (Oncorhynchus mykiss)"

Mark W. Chilcote
Can. J. Fish. Aquat. Sci./J. Can. Sci. Halieut. Aquat. 60(9): 1057-1067 (2003)

Look for other papers by Mark Chilcote, Biologis, ODFW, or from Bob Hooten, Biologist, BC Ministry of Fisheries. They've done a lot of groundbreaking studies the past decade.

When I have a chance to find the other papers, I'll post the citations. A lot of them, if not all of them, will be hard to find online...you may have to go to the UofW, of some other library that carries fisheries journals. If they are online, sometimes they're by subscription only.

Fish on...

Todd.