eyeFISH,
I disagree with your conclusion from the study. what I see in the study is that in this case and point adding more fish to the mix did nothing for the population, due to other constraints in the system.

many other cases state hatchery supplementation works fine. see the great lakes, or South America. naturally reproducing populations of pacific salmon, from hatchery supplemental plants.

hatchery's are tools. nothing more. not a silver bullet that will solve all the issues. we need to learn what the other issues are and find a way to fix them so that the fish populations can recover.

whether or not the paper has merit depends on how it is used. you choose to use it to claim we should abandon all hatcheries. I choose to use it to shed light on other issues. maybe get funding for other studies that are on things that maybe will solve the problem.