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- Newsgroups: sci.misc
- Path: sparky!uunet!usc!sdd.hp.com!mips!darwin.sura.net!cs.ucf.edu!tarpit!tous!bilver!alex
- From: alex@bilver.uucp (Alex Matulich)
- Subject: Re: Whales blowing rings
- Organization: W. J. Vermillion - Winter Park, FL
- Date: Thu, 30 Jul 1992 01:54:50 GMT
- Message-ID: <1992Jul30.015450.16332@bilver.uucp>
- References: <1992Jul27.142023.28312@news.acns.nwu.edu> <c7lm+5g@lynx.unm.edu> <1992Jul28.014956.8592@csuvax1.csu.murdoch.edu.au>
- Lines: 30
-
- keulen@csuvax1.csu.murdoch.edu.au (Michael VanKeulen) writes:
- >This may or may not be applicable to Belugas, but there are some species of
- >whale that blow rings as a means of prey capture. I saw a TV doco which showed
-
- You are confusing two kinds of bubble rings. What you are talking about
- is the whales' practice of swimming in a circle while blowing air, creating
- a wall of bubbles around a school of fish.
-
- The subject under discussion, however, involves a whale blowing a *single*
- small burst of air, which forms an unbroken ring-shaped bubble underwater,
- much like a smoker blowing a smoke ring. I remember in scuba class we
- were taught to blow these bubble rings from the bottom of a diving pool.
- We'd lie on the bottom blowing bubbles. They'd start out as small, fat
- tori, and gradually grow to about 4 or 5 feet in diameter and about 1/4"
- thickness before breaking up. They generated an interesting current of
- water spinning around the body of the ring, resulting in an upwelling
- in the center.
-
- >the pool it may be a result of confinement, boredom or some such, but there
- >_is_ a purpose in the wild. I've also heard of dolphins playing with making
-
- There is a purpose to a circular wall of bubbles. But what about the
- bubble rings?
-
-
- --
- _ |__ Alex Matulich
- /(+__> Unicorn Research Corp, 4621 N Landmark Dr, Orlando, FL 32817
- //| \ UUCP: alex@bilver.uucp {peora|ge-dab|uunet!tous}!bilver!alex
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-