Re: [RML] species differentiation
HH (Harro.Hieronimus at t-online.de)
Sat, 5 Sep 1998 12:14:01 +0200
peter.unmack at ASU.Edu schrieb:
> On Fri, 4 Sep 1998 tayers at bridge.com wrote:
>
> Why don't you ask an easy question, like are Andrew and Alan really having an
> affair on the side? There is no single criteria to distinguish species and it
> differs for different groups. Typically species determinations are based on
> evidence collected and then a subjective judgement is made as to are these
> differences sufficient to justify them being different species. Whether the
> species stands or falls depends upon the degree of acceptance by other workers
> in that field. One problem though is there are so few experts on certain
> groups that no one can really evaluate an opinion as they are not familiar
> enough with the subjects.
>
> Hooroo
> Peter
>
Sorry Peter,
according to e.g. Mayr a species is - easily spoken - a geographically isolated
self-reproducing population. Tim, it is nearly without any mean if species
crossbreed.
Additionally there are differences in the interpretation from what point on a
population is isolated.
There are other species concepts, however, Mayr's is the most widely accepted.
Best regards
Harro Hieronimus, Solingen, Germany
harro.hieronimus at t-online.de
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No fish - no fun
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