Extinction vs accuracy

[Ron Gatrelle]

Rudy - Can't I likewise say that extinction is only used (post Ice Age) for
human created removal events. The Do Do became extinct by human device. The
creatures in the Rain Forest are becoming extinct due to human abuses.
 
While we all debate over the semantics, wildlife about us is disappearing.
I am personally trying to do something about it (extinction/extirpation)
through the International Lepidoptera Survey as they find, determine, and
document the undiscovered leps before they are "gone."  Our motto at TILS
is: We can not protect that which we do not know. And we can't know what
these bugs are or where they are unless we collect them. Ignorance says
that there is just one species of Celastrina in North America - so just
watch IT. However, it has been the "amateur" collectors who have documented
that there are several species of Celastrina in North America - some of
which have not even received names as yet. (Sorry, I'm editorializing
again.)
Ron
 
----- Original Message -----
From: "rudy benavides" <rbenavid at hotmail.com>
To: <leps-l at lists.yale.edu>
Sent: Tuesday, January 16, 2001 3:51 AM
Subject: RE: Extinction vs accuracy
 
 
> I've only heard extirpation used in the context of a human created
> extermination or removal event.  For example, the beaver was extirpated
in
> the early 1900s in the lower 48 due to excessive trapping and shooting as
a
> result of the great demand for its pelt.
>
> Rudy Benavides
> Maryland
> ------------------------------------------------
>
>
>
> >From: Kenelm Philip <fnkwp at aurora.alaska.edu>
> >To: <leps-l at lists.yale.edu>
> >Subject: RE: Extinction vs accuracy
> >Date: Mon, 15 Jan 2001 17:13:09 -0900 (AKST)
> >
> >Message-ID: <Pine.OSF.4.31.0101151712010.24770-100000 at aurora.uaf.edu>
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> >Reply-To: fnkwp at aurora.alaska.edu
> >Sender: owner-leps-l at lists.yale.edu
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> >
> >
> >Out of curiosity, I looked up 'extinction' and 'extirpation' in
> >'A Dictionary of Ecology, Evolution and Systematics' by Lincoln,
Boxshall,
> >and Clark, 2nd edition, 1998, Cambridge U.P.--a most useful reference.
> >
> >"extinction  1: The process of elimination, as of less fit genotypes. 2:
> >The disappearance of a species or taxon from a given habitat or biota,
not
> >precluding later recolonization from elsewhere.
> >
> >extirpation  1: Surgical removal of a part; destroying totally; pulling
> >up by the roots. 2: Extermination of the population of a given species
> >from an area."
> >
> >I see little difference between 'extinction 2' and 'extirpation 2'.
> >
> > More to the point, however, might be the following entries:
> >
> >"extinct (Ex)  In the IUCN Categories q.v. of threatened species. those
> >taxa that have not been definitely located in the wild during the past
> >50 years.
> >
> >extinct (EX)  In the proposed IUCN Criteria q.v. for threatened species,
> >a taxon is categorized as extinct when there is no reasonable doubt that
> >the last individual of that taxon has died.
> >
> >extinct in the wild (EW)  In the proposed IUCN Criteria q.v. for
threatened
> >species, a taxon is categorized as extinct in the wild when it is known
to
> >survive only in cultivation, in captivity, or as naturalized populations
> >outside the former range."
> >
> > Ken Philip
> >fnkwp at uaf.edu
> >
> >
> >
> >
> >
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