mortality studies are all flawed. there is simply ZERO methodology available to see if that released fish actually survives in a natural setting, can't happen, no way. you can do the following, however: - never handle the fish, period - use a release tool such as the 'ketumrelease', not a net, of any kind. - use equipment heavy enough to get the fish to hand quickly. fish also build lactic acid - if the fight takes too long break off! what really bothers me is the notion that '...why i can catch any fish that swims on my 5wt...' so? gear up for a quick fight, learn to use your rod correctly, and do you part of try and get that fish a chance of surviving 'our fun.'