Does anyone know how much the range of the Dorset sika population has increased over the past 25 years?
It's 25 years since I worked in the South and was lucky enough to stalk them near Wareham. Whitehead says 'in 1961 it was estimated the population in the Wareham woods has increased tremendously and in 1961 it was estimated that the number of deer stood at around 200 head' by 1991 the stalker I was with thought that number had at least doubled in that herd. Whitehead adds 'in Purbeck '30 to 40 deer' (in the same year) and from Melbury escapees 'around 70 head in 1950.' Have they joined up at all I wonder? As mentioned I'm more interested in a geographical increase that pure population increases.
I'm interested in how sika populations range has spread in the UK in general. I know the Scottish herds reasonably well but where I stay currently the Lancashire Bowland herd seems to have changed little in it's range, especially in the past 25 years.
Thanks in advance.