I was wondering the same thing?I have a spot that last year this time was kicking out what I would almost call jacks.But after running into them again at the spring opener and talking to you decided that thy were residents spawning.When I catch them this time of the year i figure{now}that they are feeding on somebodys roe.It is the only spot whithin several miles of this river that offers spawning habitat.I also ran into alot of dollys in this section last year that finally left and blasted up river at the end of febuary.Are dolly fall spawners???