We have a lake here (Rend) that only allows 10 of your 25 fish to be over 10" the remaining must be 10 or less. Thought it was kind of odd the first time I fished there but it seems to work as the lake has a healthy crappie population and its pretty easy (most times) to get your 10 over 10". We were fishing one day last year for a fish fry and my wife and I caught our 50 fish 20 that were over 10" ranged from 12.75 to 15.5 and our 30 under 10 inches were 9.5 to 9.9999 inches. It sure was tough throwing back 12 inch fish but I guess it makes sure you keep a supply of mature fish to spawn.

I am by no means a biologist or did I stay at a Holiday Inn Express last night but this seems to work there.