On 3/8/06 16:01, in article , "Janet
Baraclough" wrote:

The message
from (Nick Maclaren) contains these words:


In article ,
"BAC" writes:
|
| Are you saying that, for a given ecosystem, only a certain maximum
number of
| a population of birds can be expected to survive the winter,
regardless of
| how many more than that number started the winter?

There are circumstances under which that is the case. It is true for
red deer in many parts of the Highlands.

Um, if that were true for red deer in the Highlands, surely their
population would be static? AIUI, their population has multiplied in
recent decades, putting far more pressure on local ecology.

Isn't that why there are culls, as opposed to stalking? To even out the
numbers and make the land able to sustain them?

--
Sacha
www.hillhousenursery.co.uk
South Devon
(email address on website)