[Rhodes22-list] A new use for Le Menagerie
Jim White
jdwhite at utpa.edu
Fri Oct 22 12:09:39 EDT 2004
When the winds abate to a reasonable velocity here (they're still
gusting to +30mph ), I'm going to take several grad students out on Le
Menagerie to collect a critter called Aplysia (common called sea-hare
or "inkfish"). This unshelled gastropod (slug) swims on top of the
water, using extensions of it's "foot" as wings. When it's disturbed
it releases a mildly toxic purple ink as defense. We'll just put out
enough sail to make a bit of headway (might even drift) and snatch
them up with long handled dip nets, keeping them alive in an aerator
equipped icechest. They're sort of rare this time of year- so I
anticipate a full day of underway on this project. Aplysia are about
10"-12" and weigh around a pound...several species, but the one we're
concerned with is Aplysia brasiliana.
The Marine Biological Laboratory, a division of UTMB (University of
Texas Medical Branch) has been interested in this organism for a
number of years. You see, Aplysia exhibits a giant neuron, very handy
in nerve research, and a lot of advances in understanding things like
spinal cord injury have been accomplished using this critter.
Additionally, a tiny colonial animal which is considered a "fouling"
organism, something called a tunicate (Botryloides and Botrillis sp.
in this case) is currently of interest to us as well. I have several
PVC racks of glass slides on which I am culturing tunicates adjacent
to Le Menagerie in her slip. This critter just doesn't do well in
captivity, but I guarantee you, it loves boat hulls (even ones with
relatively new bottom paint), and dock lines. What's so cool about
this organism (a hemichordate for all of you zoologist types) is that
there are researchers from MD Anderson Hospital (maybe you aren't
familiar with this one...it's a world class cancer treatment/research
hospital in Houston Tx.) who are studying these little fellas for keys
to understanding replicative diseases (cancer, AIDS).
Ultimately, unglamorous and ignored marine biota like these might
benefit us in ways we can't even imagine.
Pretty nifty stuff huh?
Jim White
Le Menagerie
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