Article View: sci.bio
Article #2741Re: why (evolutionarily) are zebras striped?
From: Stan Friesen
Date: Mon, 04 Jan 1993 20:18
Date: Mon, 04 Jan 1993 20:18
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In article <1i5gf2INN7ea@shelley.u.washington.edu>, jespah@carson.u.washington.edu (Kathleen Hunt) writes: |> |> 6. Individual Recognition |> Zebras have individually distinct stripes, so these social animals may |> be able to recognize individuals by stripes. I imagine this might be one |> function of stripes, but not the function they originally evolved for. |> (teleologically speaking. Of course stripes only evolved because of some |> increase in fitness enjoyed by zebras with stripes, not with any goal in |> mind...let's nip that "Evolution Is Not Goal Oriented" flame war in the bud...) But this does provide a good example of why teleonomic (*not* teleologic) language is useful in describing evolution. Let's try to recast the above without using teleonomic language: I imagine this might be one function of stripes, but not the function that provided the original fitness increase that caused the stripes to evolve. Blech - a doubly embedded subordinate clause. This sort of locution is hardly conducive to clear communication. [For a description of the distinction between teleonomic and teleologic, see "Towards a New Philosophy of Biology" by Ernst Mayr]. -- sarima@teradata.com (formerly tdatirv!sarima) or Stanley.Friesen@ElSegundoCA.ncr.com
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Path: arc1-ca.pugleaf.net!sparky!uunet!tdat!tools3!swf From: swf@tools3teradata.com (Stan Friesen) Newsgroups: sci.bio Subject: Re: why (evolutionarily) are zebras striped? Message-ID: <1687@tdat.teradata.COM> Date: 4 Jan 93 20:18:33 GMT References: <1992Dec31.204015.18922@husc3.harvard.edu> <crystal.725914988@glia> <1JAN199320283193@utkvx3.utk.edu> <1i5gf2INN7ea@shelley.u.washington.edu> Sender: news@tdat.teradata.COM Distribution: usa Organization: NCR Teradata Database Business Unit Lines: 27