Extinction vs accuracy

rudy benavides rbenavid at hotmail.com
Tue Jan 16 13:55:29 EST 2001


Ron,
 
I wouldn't discount semantics, after all, its a big part of our whole
package.  I agree that extinction can result from a human created removal
event...or from some other source, eg., asteroids and dinosaurs.  My point
was that (at least in my wildlife circles) extirpation (as Michael just
mentioned) is generally attributed to a wanton or deliberate act.
 
You mentioned the Dodo, was the extinction attributed to slaughter or to
habitat degradation and introduction of feral animals?  A deliberate act or
a reckless act.....or a whole lot of both on that island?
 
Now, if a national bounty was mounted on Pieris rapae, I think you would see
the word extirpation used widely in reference to the outcome.
 
I do not mind editorials....nor people on the list expressing their
heart-felt feelings on issues.
 
Rudy
Maryland
 
 
 
 
 
 
>From: "Ron Gatrelle" <gatrelle at tils-ttr.org>
>Reply-To: "Ron Gatrelle" <gatrelle at tils-ttr.org>
>To: <rbenavid at hotmail.com>, "Leps-l" <Leps-l at lists.yale.edu>
>Subject: Re: Extinction vs accuracy
>Date: Tue, 16 Jan 2001 00:23:49 -0500
>
>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>
> > >MIME-Version: 1.0
> > >Content-Type: TEXT/PLAIN; charset=US-ASCII
> > >Reply-To: fnkwp at aurora.alaska.edu
> > >Sender: owner-leps-l at lists.yale.edu
> > >X-Listprocessor-Version: 8.2 -- ListProc(tm) by CREN
> > >
> > >
> > >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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