Good deer management should aim to produce a healthy population of deer which is in balance with the local environment.
Trophy hunting should play no part in this as it is not compatible with natures intentions! Natural selection is based upon survival of the fittest, not shooting the fittest!!!
For muntjac I would suggest that you impose a shoot on sight policy with due regard for dependant fawns. They are a very invasive species that are damaging our countryside to a far greater extent than most would appreciate! As a woodland impact assessor they give me immense concern!
Roe however are an indigenous species which are part of our natural woodland biodiversity. They still require managing as we have no predators to cope with them, but we should do our best to replicate nature when doing so. A good start point would be a 60:20:20 split for Young:Mature:Old. However, I would always try to preserve any very good mature animal, male or female. Try to establish an acceptable holding capacity for the land concerned. This is difficult to quantify as it will be decided by such factors as owners view, RTA's, deer impact, etc..
Once you have established your holding capacity you can then cull anything over that in accordance with ratios above. However, you also need to factor in immigration and emmigration as well as other losses such as poaching, RTA's, etc..
As you can see, it can never be an exact science!
The best thing to do is speak openly with the landowner and discuss the above points. Think of the deer and not your agenda's. Become a wolf and not a trophy hunter and you will not go too far wrong!
MS