So I’m gonna attempt to explain the road effect one more time because I believe its most definitely happening and again I’m basing this stuff off of a lot of real world experience…….
Yes, you most definitely see does cross the interstate and highway as you are driving along……but what you don’t see unless you are there to watch it play out day after day is that the doe you saw eventually tries to come back across and maybe she does with no issue…..but tomorrow she does it again and again the next day and when a doe exhibits this behavior it doesn’t take very long at all before she is laying by the road dead. I’m talking a week or two usually. There are few does that use both sides for very long and likely none that do it for months and years….The road is steadily knocking these does off and choosing for the ones that don’t do it on either side……Meanwhile there is a replacement process that’s happening that’s “filling in” this mortality…….Knowing what we know about does using both sides of the road…..where do you think is the most likely place for the new does to come from?? This is not a complete all or nothing but what happens is 9 out of 10 new doe recruits are gonna come from the interior of the population to replace the road mortality or “fill in” like we’re recycling that trait within that pocket over and over without allowing much influence from another pocket beside it…There will be that 1 out 10 that fills in and is why you will see variation on the fringes. Some “barriers” will cause a more distinct break with less variation than others.
"For what shall it profit a man if he gain the whole world and lose his soul?" .....Mark 8:36