Very good Stuart, I had to look up the old latin there. John, very well put, a good explanation to others that are not foresters.
My input for what it is worth................ you need to be a narrow minded individual to not take all considerations into account.
I am a deer manager on some land where the population dynamics and the environment are important. Therefor, good deer management occurs so that both parties including the landowner (most importantly)are happy.
I have helped foresters where, as Scotspine states, trees are the asset, so therefore the deer need to be removed irrespective of circumstance.
I have a FC lease where a population of 5 per 100 hectares is the practice. For those that dont know what that means..........What you see, you shoot.
Each piece of ground has its own ability to sustain a population of deer and this is what will dictate what needs to happen. Unfortunately, there is no exact science to deer management and each landowner and the use of the land will dictate what is required.
This is by no means an answer, but we should recognise that each boundary will have a change in management, and therefor a change in policy for the deer. This is also true even where DMG's exist.
I will step down at the mo and return post birthday drinks 8)