how old do bluegill have to be before they will spawn? and what size are they when they hatch? how big will they get in a few weeks?

my reason for asking is: my new pond was stocked 2 weeks ago and due to the hurricane it filled and i had a lot of fish to go out the standpipe. i bought a trap today and put it in the stream about 40 yards below the pond and caught about 15 bg within an hour. they ranged in size from 3/4"- 2"....just curious if they have spawned since they were stocked.


Scott Hanners