S-Man, the fawn mortality studies aren't new. I don't know exactly when it was confirmed, (through "proving it" forensically),that bears take a significant amount of fawns, but I do know it's been several years now that it was published.
Yotes -- of course they are predators also.
But they are way more efficient when habitat is poor. Again, "actual studies" show that when there is good shrub layer and healthy habitat, deer are less susceptible to predation than when habitat is stressed and open.

I Haven't quite figured out what your are saying about a buck going 3 miles after a doe???
Did you not know that bucks travel for miles during the rut? That is common. They breed one doe and off they go looking for another.
During the rut I see bucks here that I've never seen before.
Maybe I'm not understanding what point you are trying to make, but again, radio collar studies long, long ago, have proven how bucks roam long distances.
I 'm also trying to figure out what the significance of a doe running from that buck is???? Does run when they are not yet ready, but bucks will and do, chase regardless. Bucks can sense (flehming - sp?) when a doe is "approaching" estrus. They will stick right on their tail until the magic happens, but does don't allow them to "do it for fun." They only stand for them when it counts.
Geez, this birds and bees stuff is something you shouldv'e already known.
Just kidding -- couldn't resist that.

Hey, just curious, how did you watch a buck go three miles?
And "when" did you see this happening?