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From: bill@ut-ngp.UUCP
Newsgroups: talk.origins,sci.bio
Subject: Re: question about animal hybridization
Message-ID: <4870@ut-ngp.UUCP>
Date: Fri, 20-Mar-87 16:56:45 EST
Article-I.D.: ut-ngp.4870
Posted: Fri Mar 20 16:56:45 1987
Date-Received: Sun, 22-Mar-87 20:49:29 EST
References: <3353@ihlpa.ATT.COM> <10980@teknowledge-vaxc.ARPA>
Reply-To: bill@ngp.UUCP (William H. Jefferys)
Organization: UTexas Computation Center, Austin, Texas
Lines: 29
Xref: utgpu talk.origins:437 sci.bio:156

In article <10980@teknowledge-vaxc.ARPA> dplatt@teknowledge-vaxc.ARPA (Dave Platt) writes:
>Lew Mammel, Jr. asks,
>
>> My question is, is there an example of this intransitivity among
>> known populations of animals? ( N.B. animals, not plants! )
>
>I'm not sure about the biological angle (intergroup fertility), but
>I'm pretty sure that there is at least one known case involving the
>standard definition of species (intergroup interbreeding).  There is a
>"ring" of species of arctic birds (gulls, I believe) that exhibits
>this sort of behavior.  

See Raup, _Darwinism Defended_, p. 138. He references an article
by M. Ridley, "Who Doubts Evolution?", which appeared in _New Scientist_,
90, 830-832 (1981).
 
Bill Jefferys

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