Hey all,
An interesting angle on this debate is a stable of In-Fisherman magazine, that is called Selective Harvest. I beleive the concept is to keep only small to medium sized fish and release big ones. This idea was presented first ablut ten years ago, so I am not sure of the data now. I am sure that In-Fisherman has continued research in this field. One interesting point is that the habitat for larger fish is depleated by compition by the more numerous smaller fishes. If the smaller fish are consumed then the habitat is less depleated and is able to sustain more larger fish. In Fisherman is not a stickly flyfishing based mag. but do have a lead in the research that they do over conservation over other mags. They also work with several fish and game depts to keep up on the process. I hope this helps.
Sarge.