Although habitat is a primary necessity for recovery it is pretty clear that our current river habitats are well below their carrying capacities and estimated productivity capabilities, even in their degraded state.

It is becoming ever clearer that a marine survival bottleneck also exists, stemming largely from food availability and continued declines in forage fish availability and zooplankton prey items for juveniles. Of particular concern are the affects of ocean acidification on the carapaces of shelled species, especially post-larval dungeness crap megalopa which are a key component of outmigrant smolt diets entering the marine environment.

Point being, although fisheries and particularly fisheries by-catch and northern intercepts are a major concern the environment itself is likely at the root of the problem. A warming and increasingly acidic ocean as a result of climate change is a much much larger nut to crack. If we can't even make the move to stop killing fish to save fish, I doubt humans as a species will be able to make the much larger sacrifices necessary to stop destroying the oceans to save fish.
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When I grow up I want to be,
One of the harvesters of the sea.
I think before my days are done,
I want to be a fisherman.