BINGO! Exactly, Ukee.Another excellent point, Ukee. More specifically - readily available and nutritious inverts (e.g. stoneflys) in the right stretch of the river at the right time - is what is needed for resident fish populations and their life cycles at that point in space/time. Certain species - such as pinks, chums and marine fishes - do not commonly take advantage of inner watershed inverts since they feed in the eastuaries/oceans. This includes herring and Eulachon - among others. Using these species as indicators of stream production is inappropriate.Another good point, Ukee.