I posted on your other thread before I read this one, and it seems like they said the same thing as I did...
Salmon are definitely around and available to catch through the ice, several ponds throughout the state stock them, and if they don't get caught, they just keep getting bigger!
Here's the list of ponds that were stocked last winter, its likely that the same will be stocked this year:
http://www.mass.gov/dfwele/dfw/fisheries/anadromous/broodstock_salmon_stocking.htm