I'm tired of looking but there could be something in this link.
http://142.229.230.68/FishWildlife/F...Apr16-2011.pdf
there's some interesting stuff, this is a good bit;
Concerns expressed from some stakeholders about overpopulations of walleye in some lakes,
view this as underutilization, sees impacts on the fish (“skinny walleye”), and potential conflicts with other users. View some advantage to holding some species (e.g., walleye) under carrying capacity. FMB responded that there might be some lakes where fish are nearing carrying capacity. Response to situation might be to allow increased harvest or let the lake achieve a balance naturally. Are pros and cons for both approaches.
Concern raised that northern pike are getting smaller and skinnier in some southern Alberta water bodies (Medicine Hat area). Unsure of cause or what could be done. FMB responded that this issue should be brought up at the Area Round Table for discussion
and is this a cached webpage or did it take 13 years to ammend?
http://www.gazette.gc.ca/rp-pr/p1/20.../reg3-eng.html