home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: soc.singles
- Path: sparky!uunet!digex.com!huston
- From: huston@access.digex.com (Herb Huston)
- Subject: Re: ISO MY PRINCESS
- Message-ID: <By66o0.Cwn@access.digex.com>
- Sender: usenet@access.digex.com
- Nntp-Posting-Host: access.digex.com
- Organization: Express Access Online Communications, Greenbelt, MD USA
- References: <By324r.Iy8@access.digex.com> <1992Nov22.035448.6142@sol.UVic.CA>
- Date: Mon, 23 Nov 1992 12:57:35 GMT
- Lines: 57
-
- In article <1992Nov22.035448.6142@sol.UVic.CA> atovorni@engr.UVic.CA writes:
- >In article Iy8@access.digex.com, huston@access.digex.com (Herb Huston) writes:
- >>In article <1992Nov20.002845.20217@murdoch.acc.Virginia.EDU> cjp8b@dayhoff.med.Virginia.EDU (Chris Penington) writes:
- >>>Are eu therious? Marsupials don't even make it into the placentile
- >>>rankings. They've adapted to a different set of test conditions and
- >>>fail marsupially (and monotremously) in competition with many
- >>>placentals. Theriously!
- >>
- >>Virginia oppossums beg to differ with you, sir! Not only did their South
- >>American relatives survive the invasion of North American placentals, but they
- >>successfully invaded the placental stronghold. (And the crawlspace underneath
- >>the parental abode in Florida.)
-
- Opossums are marsupials. (Sorry about the earlier misspelling.)
-
- >>> Cats and rats are major problems for
- >>>Australia's native fauna.
- >>
- >>As they are for New Zealand's non-marsupial, native fauna. Living on an
- >>island, even one the size of a continent, is not conducive to developing
- >>effective defense strategies. But how, sir, did those placentals swim to
- >>either Australia or New Zealand?
- >
- >In order to answer this I have to relate back to my studies of Plate Tectonics.
- >Australia was once connected to the rest of the world by land. Did you ever hear
- >of Pangea? The pangean continent broke apart and Australia drifted away from the
- >rest of the world before the evolution of placentals. Placentals evolved in the
- >rest of the world while Australia was not connected to it by land.
-
- Australia was connected to Antartica and South America and has been drifting
- toward Asia. It has not yet collided. How did cats and rats reach Australia?
- To help you out, I'll tell you that when Europeans arrived, the only placental
- mammals in Australia were the aborgines, the dingos, and bats (rather obvious
- how the bats got there).
-
- >Marsupials were overrun by placentals in the rest of the world because placentals
- >were better equipped to compete for food & survival.
-
- This is not true. South America's marsupials were already in decline when
- the Isthmus of Panama formed, but there are still plenty of marsupials in
- South America, and many South American marsupials successfully invaded North
- America.
-
- > Cats, rats & rabbits are
- >doing to Australia's marsupial population today what placentals did to marsupials
- >in the rest of the world a long time ago.
-
- But how did the cats, rats, and rabbits swim to Australia?
-
- >Geuss my geology degree is good for something after all...
-
- Your geology is quite sound, but this is also a question of zoology.
-
- Marsupials are not second-class mammals.
-
- -- Herb Huston
- -- huston@access.digex.com
-