Hello Justin,
Back home in Quebec we hunted from opener in September up until deer hunting season in November; after that, all the ponds were frozen... we never had any boats to hit open water. Now that I'm here in Jersey, where a lot of ducks come to winter, it gets a little bit more complicated. It can get really complicated in some states still to the south of us, where they have these split seasons you mentioned. I would assume they have them to have a go at the local ducks for a bit, then a break before the migrating ducks show up.
Looking at the seasons I have printed out here by my desk, it says NJ has 60 day duck season, split over three zones (north, south and coastal); not all of them have the same dates and they are particular in that the north zone starts first, followed by the south zone, followed by the coastal, but at which time both the north and south zones are closed! That coastal zone is only open for a week in early-Nov, after which there is a one week break there, but it opens up again in the north and south zones. The north and south zones close early Jan, but the coastal zone goes until end-Jan. No hunting on Sundays statewide.
Season dates by zone are yet again all different for Brant, Canada Geese, Sea Ducks and Snow Geese. Confused yet?
I had a chance to peruse through the Ontario hunting stuff while I was up at a lodge on the French River canoeing with my wife this past summer, specifically the moose hunting regulations. Those seemed quite complicated to me as well
it took a while before I found out that non-residents had to go through an outfitter, or hunt with an immediate family member who has a license. Don't get me started on deer hunting zones and dates here in NJ
Sometimes, going through these rules and regulations are enough to make a sane man go crazy...