The land is 2000 acres and there is an estimate of 30 to 40 Roe.
Ok - using a basic demographic model, with growth rates taken from known growth and mortality rates in Scottish roe deer populations, one doe will (on average) lead to a living population of 33 live animals in 10 years.
How much influence might the female have? She is passing on her and her forebears’ genes, not the sex, obviously.
Fixed it for you
All places are different I know, but I’ve regularly been able to shoot 100-120 females off an area of 3000 acres; by seasons end you get the impression that you’ve left an awful lot, and more so by June. Just saying.
Not at all in fact the government has made it clear there is no issue here and no need to lower the number. I am sure there are some priority areas but generally its a free for all. Mange them as you see fit is the message i get. NS are of the same opinion .
Up to 50% given that she provides 50% of the genetic material.
How does a significant imbalance in sex ratio of the sperm arise when during meiosis an X sperm and a Y sperm are produced from each male cell? For each Y, there is an X.
From my efforts to try to understand sex ratios at birth, it seems that there are a *lot* of factors at play (mostly post- sperm production) and I don't get the impression that even the people who are researching this really have a complete understanding of all the mechanisms.
No idea. In the sheep we have, some rams throw lots of ram lambs and others throw lots of ewe lambs.
It's 50/50 unless using sexed semen. I've heard farmers say "more bulls with this bull" but I'll bet if you looked at the figures overall, it would be 50/50. I think there is a statistical term for this but that's not my thing at all!
I'm dimly aware of the existence of these factors relating to birth ratios. What was a surprise to me was the assertion that an animal might produce sperm mainly.of one sex or another.
In humans, (I won't comment on sheep because I know almost nothing about them and don't much like them) the reason for this has nothing to do with sperm or particular people. It is a simple consequence of elementary (pre-GCSE) probabailty.
There’s reasonable evidence from a number of species of sex biases in ejaculated (rather than produced) sperm. Mostly due to differential mortality: 50/50 at production, but with one sex of sperm dying off faster. Reasons unclear.
Sadly the pilots have failed and are just going through the motions till there end three years they have one more season to go after this. The Black Friday fridge scheme is helpful to those that need a shiny new fridge but sadly this will not help in deer reduction. But it does mean the deer will be kept in better conditions.
It will help me shoot more Red deer.
