Hooray!, at last someone else who knows that decimation only reduces pops by
ten percent each time. Congrats Russ!
I hate the way people ( I guess they are also the unwashed) misuse this word.
Tony.
At 11:45 6/04/99 +1000, you wrote:
>
>> Well of course if the gulls did get one out of every ten chicks, then they
>> would have decimated them, literally. Decimation is not devastation,
>> decimation is a rather trivial event in natural populations, unless it is
>> done repeatedly. All other factors remaining equal, decimation needs to
>> occur 7 times to halve the population i.e. 100%, 90%, 81%, 72.9%, 65.6%,
>> 59%, 53.1%, 47.8%.)
>
>Not really related to the original message, but, given Philip Veerman's
>interesting figures above, does anyone know if the gulls' 'success rate'
>would increase from 10% as the tern population decreased?
>
>Russell Woodford
>
>
>
>To unsubscribe from this list, please send a message to
>
>Include ONLY "unsubscribe birding-aus" in the message body (without the
>quotes)
>
>
Tony Russell
Ph: 08 82078470W
08 83375959H
Fax:08 82078422
e mail:
Adelaide South Australia.
To unsubscribe from this list, please send a message to
Include ONLY "unsubscribe birding-aus" in the message body (without the
quotes)
|
