i think the reasoning is that when you look at the stats the majority of those fishing for salmon catch maybe 1or 2 fish a season. it is the 8 to 10% who catch the majority of the fish that need to change
as most of them should know more about the fishery because the time they spend at it this is where the change is needed and I think the feeling is that that is happening voluntarily. you will get a very small % who still look at large tallies as the pointer of their season. however the change of attitude has become more evident in the last few seasons that conservation is happening. the stats also show that what ever the final run numbers in any season are the catch rate remains constant at just over 50%, its when the catch rate gets to 60%+ that it becomes a major problem.