A couple of things...
First, are you suggesting that a run of fish no longer returning to a given watershed equates to the extinction of a specific species?
there are numerous scientifically sound investigations that support this notion. it is complicated by the fact that anadramous fish seem to either be 'home bodies' returning to their natal rivers or 'explores' populating nearby systems. this characteristic is more than likely what has enabled them to survive through the millenia.
Fix the HABITAT in those rivers, use hatcheries to restsart the runs and viola - "extinction" over. Doesn't take 100 years either.
and, of course, that is not going to happen. you are not going to remove the local mall that is built on a flood plan of your favorite river, you are not going to take out the hydro that everyone has come to depend on, you are not going to fix 100 years of overharvest of the forests, your are not going to shut down strip mining.............. While habitat is a convenient mantra to drap yourself with, neither you nor anyone else is going to reverse the damange already done simply because of the economics involved. so the best we can do is start to get concerned about variables we CAN control.
Second, are you suggesting that it is the existence of hatcheries that has playrd any kind of role in the removal of these salmon runs from these systems? That also is completely untrue and again, I believe you know that. Fear mongering and useless inflammatory rhetoric.
ah, yes that is also a scientifically demonstrated fact. i can understand your discomfort in accepting this fact but it is not going away. just think of your self as a wild fish. there you are sitting comfortably in your favorite chair, snacks and beverages at hand when the big yellow hatchery bus pulls up in front of your residence and 100 clones enter your space. you are now displaced! nothing to eat, no where to hide or rest. gone is your environment which was tough to begin with. the volume of hatchery smolt that has been the norm IS a causal factor in wild fish extinction. hatchery 'reform' in the US is targetting this notion by dramatically reducing the numbers of hatchery smolt being released each year. and actually, hatchery smolt put back NOTHING into our river systems. these programs were and continue to be, props to the commercial sector, nothing more. when you get a return rate of hatchery fish that is in the ONE PERCENT range, you know that you have created smolt incapable of sustaining life in the wild. now couple that with a 30% success rate at spawing, wild fish are at about 70%, and it should tell you that it takes far fewer wild fish to sustain a run.
Please get off the "wild fish are better" bandwagon, deal with all the facts, and consider the values of others as being as important as your own. .
my 'high horse' is focused on extinction. as a human being i feel obliged to school myself regarding what is going on with our anadramous fishes and take a stance that helps preserve our wild fish heritage. i know that i have been a part of the problem through the decades by harvesting wild fish from various rivers and salt water environments. i have had my day, i want my grandkids to have their's. the notion that hatcheries are preserving anything is a joke. they are there simply to support the commercial sector. they are much like your net pens in that the sea food industry demands them.
what we can do TODAY is to learn all we can about the impacts of hatchery smolt and start to mitigate those impacts. it has taken well over 100 years to put all of us in this pickle and we will not see this turn around in any short order. that means impacts of bag limits and season lengths. time to realize that this is not 1913, this is 2013 and we have a significant problem on our hands. arguing as if the runs were in the shape they were 100 years ago is not a reasonable positon to take and one that flies in the face of the facts of the matter.