Extinction vs accuracy

[rudy benavides]

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
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>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)
>
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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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