Slot limits have their place in management. Normally, size limits on fish are to protect spawning-age fish, or to increase take of certain size classes for some reason (such as to reduce populations, increase populations, make a "trophy" fishery, etc.). I was poised to say that we don't have em out here, but we do have a minimum size limit on bass on a lake I fish. It does not appear to have had any impact, but it has only been in place for a year or two.

One thing I have noticed is that in places where, say, the minimum size trout that can be kept is 20", you get a whole lotta 19" trout.

Slot limits are a MANAGEMENT tool, in most cases, whereas C&R is, in many cases, a POLITICAL tool.