I personaly think it is not a good method of managing fisheries. Size limits works - pretty simple... make sure fish kept had a chance to spawn at least once. Lets say you have 1 walleye from 50 to 70 cm limit in CV or Pigeon, there is no freaking way that population would be decimated by anglers...both smaller guys and big spawning females will be released thus maintaining healthy numbers.
And I do not get that 100 walleye catch and release a day fun - whats so fun about injuring and putting so many fish through stress like that? Borring, no challenge if you ask me, and I bet 1 or 2 from those 100 released die anyway
Thats why after few hours of catching and throwing 20-30 walleye back at PCR or CV I stopped going to those reservoirs... whats the point? If I want challenge and a keeper I go to Travers or other place where I can keep some.