Help... found 24 duck eggs.

We have backyard ducks that free range.. We just found 24 eggs that we didn't know we have. They have been in a cool moist area, shaded from the sun (we are in Florida and the days have been around 90 so far). The momma duck is not sitting on them constantly, but it does look like she goes there to lay (she is relatively young). I candled all of them. IF they had no dark spot at all I tested them to see how old. If they had any dark spot I set them aside, but now I don't know what to do with them. None of them have veins (I have no idea how old they all are)..all of them have a dark spot of some sort. Some on side of egg, some at bottom of egg. I can not see any movement at all. HELPPPPP.