You meant highest concentration of unemployed fish biologists.

Because of my lack of background on steelhead management, I will only comment on a few things about the policy. After one glance, from a biologist's point of view, I find it quite sounding with maybe the odd questionable approaches. From an angler's point of view, I can see our opportunities being downsized. Oh well, the fish comes first anyway right?
Possible reasons of low steelhead returnsAgain, I'll offer a few suggestions that
may have impacted the return as I am not as updated on the current situation as others.
One thing to keep in mind is that ocean productivity is irregularly cyclic. One prime example that indicates this trend is the pacific and atlantic herring fisheries (I do not have the graphs of historical harvest and returns, will post if I find them). Historically, fishermen in Japan or East coast of NA have had seasons when hardly any herrings returned during spawning seasons, while other years their allowable harvests well exceeded the average. Why do such occurances take place, no one really knows. One possible hypothesis is climatic fluctuation. Ocean temperature is a major precursor of productivity of planktons, which acts as the base of the food web. This may possibly impact the salmonid populations after their ocean phase as they spend more than 50% of their lifespan in the ocean and sit on a higher trophic level. Ocean temperature and other climatic components can impact the spawner return size, the question is how much? I shall cease discussing this idea at this point before embarrassing myself in front of my colleagues as I simply do not have information to continue further.
If ocean survival is to blame, then is it simply out of our hands since we can not control natural trend? The answer is not entirely yes. Most salmonids fail to survive in the ocean soon after smoltification. Smoltification is a juvenile phase between the river and the ocean. Survival rate of smolts depends on several factors. These include the presence of predators and ability to feed. If a smolt is too small, it can not feed as fast as others, its chance of being eaten is much larger (especially during warm years when higher populations of mackerel and other pelagic species are further north).
One factor that cannot be neglected is smolt size. If the smolt is bigger, survival rate is higher. How does a juvenile salmonid achieve the optimal weight before smoltification? By rearing in a healthy stream where food is abundant. Abundance of food means higher population of insects.
Healthy stream means shady pools created by overhanging trees, well oxygenated water and sufficient amount of gravel.
Anyways, I'm trying to say.... Better spawning and rearing habitat brings back more fish.

Saturday night....
