"Malcolm Kane" wrote in message
...
In message ,
writes
On Tue, 12 Apr 2005 08:47:22 +0100, "Tumbleweed"
wrote:


"Paul" wrote in message
...
Why do the RSPB and other conservation hooligan charities such as the
Woodland Trust kill wildlife rather than manage it properly. We all
know killing large numbers of animals merely causes them to breed more
and quicker.

Thats must be why there are lots of whales then?

No, It is always possible to slaughter a species almost to extinction.


But surely Angus when the main pressure was taken off a number of years
ago this principle you have quoted before that it causes faster breeding
would by now have been making a really noticeable difference.

The concept of population rebound in some species may not be as far fetched
as you seem to believe.

From Deer-UK's ecology of the Roe Deer,

http://www.deer-uk.com/roe_deer.htm

"In good conditions Roe have a high fecundity rate. In the South of England
twins are the norm and in very good conditions triplets are not uncommon.
Many triplet fetuses are found during a post-mortem examination, though not
all would necessarily have been born alive. But if all three fetuses are the
same size, the indications are that all three will be live at birth. Should
one or more be smaller than the others, then it is unlikely it would have
been born alive. In a particularly cold and/or wet early summer and autumn,
the survival of all three triplets is greatly reduced and it is normally
buck kids that fare worst. This could be due to nature perpetuating the
species by saving the does for the following breeding season."

So, following extensive culling, it seems probable there would be reduced
competition for available fodder etc amongst the survivors, hence the
incidence of multiple births would be likely to increase, until the
population reached 'normal' densities for the prevailing conditions.

I do not know whether the near extinction of some of the planet's cetaceans
will have had any effect on their species' birth rates, (it seems less
likely) but some experts are estimating the annual population growth of some
species at between 7 and 8% since the general ban was introduced.