A couple of points:
1) Populations of +2 year old walleye ae down over 60% from a few years ago, no good survival in any year class since 2003 except average for 2007. Thus, we're relying on 2003 year class (best ever) and average 2007 year class. Other years between 2003 and present have been BAD year classes.
2) Although I have no problem with Canadian commercial fishermen from taking their quota (after all, it is agreed upon by the GLC), I do have a big problem with NO Size Limit in Canada. If they are taking millions of 12-16" walleye (and they are), then these fish have not spawned even once.
That hurts the population no matter the arguement (a fish out in July is the same as a fish out in April).