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GLIN==> Sea Grant News: Clay Spray for HABS; Disease Affects More than Salmon


Editor's Note: Sea Grant News & Notes is a twice monthly story idea tip
sheet from NOAA's National Sea Grant College Program containing brief
news items, with contact information, about marine and coastal science
research and outreach activities from around the United States.  For
additional information please contact Ben Sherman, Sea Grant Media
Relations at Sherman@nasw.org or by phone at 202-662-7095. Thank you.

Sea Grant Research News:
 Clay Sprays May Control Harmful Algal Blooms
 Research Suggests Fish Disease Affects More than Salmon

Sea Grant Web Spotlight:
Introduced Species in Oregon Estuaries:

Sea Grant People in The News:
 Texas Sea Grant's Gary Graham Named to Panel

Sea Grant Calendar Spotlight:
Delaware's Coast Day, October 6, 2002, Lewes, Delaware
Coast Day New Jersey, October 13, 2002, Cape May, New Jersey

Clay Sprays May Control Harmful Algal Blooms
Harmful algal blooms, or HABs, can harm fish, birds and even people who
are exposed to the toxic algae.  HABs come in many forms, including a
red tide that regularly affects Florida waters, a brown tide organism,
and Pfiesteria piscicida, an algae associated with fish kills.
Scientists are unsure of exactly what causes the blooms, but a Woods
Hole Sea Grant research team may have come up with a way to treat the
increasingly common occurrences.  Don Anderson and Mario Sengco are
testing the use of clay to manage and control HABs.  Clay, mixed with
seawater, is sprayed over the algal bloom, where it binds with the
harmful organisms and sinks to the bottom.  In laboratory experiments
meant to mimic field conditions, results showed that the clay removed 80
to 90 percent of the toxins in 2-hour treatments.

Korea and Japan have used clay to control HABs periodically.  In Korea
clay is used mainly in aquaculture operations, which provide about 30
percent of Korea's fish.  The concept has not caught on yet in the U.S.,
mainly due to water quality concerns.  The WHOI project uses only native
clay types, many of which come from the Florida coast in the Gulf of
Mexico.  Further research on water quality issues and the future
feasibility of clay use to treat HABs is currently taking place.
CONTACT:  Mario Sengco, WHOI Sea Grant, Postdoctoral Investigator,
Biology Department, WHOI, (O) 508-289-2749, Email:  msengco@whoi.edu

Research Suggests Fish Disease Affects More than Salmon
A bacterium thought to only infect salmon may be more widespread than
previously thought, according to California Sea Grant research.  Fish
pathologist Ron Hedrick found that the P. salmonis bacterium could also
infect white sea bass.  The study began after farm-raised Chilean salmon
consistently got sick and died after being placed in open-ocean net
pens.  The occurrence puzzled scientists for several reasons.  First,
the salmon eggs, not salmon, were flown to Chile and the disease was
believed not to be transmitted via eggs.  Also, Chile had no wild salmon
living off its coasts.  So where did the bacterium come from?

Since finding the bacterium in white sea bass, Hedrick now believes that
P. salmonis exists in the world's oceans and is neither unique to salmon
nor sea bass.  Consistent with this, scientists have found similar
bacteria in the Atlantic and Pacific oceans and the Mediterranean Sea.

Hedrick is now working to detect bacterial DNA and antibodies of the
bacterium in hatchery and wild white sea bass.  If successful, this will
further support the conclusion that the bacterium is present in
naturally occurring populations of marine fish. CONTACT:  Ron Hedrick,
Professor, School of Veterinary Medicine, University of California
Davis, (O) 530-752-3411, Email:  rphedrick@ucdavis.edu

SEA GRANT PEOPLE IN THE NEWS: Texas Sea Grant's Gary Graham Named to
Texas Sea Grant marine fisheries specialist Gary Graham has been
appointed the National Academy of Sciences Committee on Cooperative
Research in NOAA Fisheries. The National Academy panel will address
issues promoting cooperative and collaborative fisheries research
programs between the academic community and NOAA Fisheries.  For more
information contact Graham at: Office Phone (361) 972-3654, or by email
at: glgraham@tamu.edu

Introduced Species in Oregon Estuaries:
A Web-based primer on Oregon invaders, this site includes a complete
list of aquatic invaders found in Oregon to date, plus clear
illustrations of several important species. The website's goal is to
summarize the present knowledge of non-indigenous species in Oregon
estuaries. Through scientific survey there is evidence that well over
100 invaders have become established in Oregon's estuaries. For more
information contact: Sylvia Behrens Yamada, Office Phone: (541) 737 5345
or by email at:  yamadas@bcc.orst.edu

October 6, 2002, Lewes, Delaware
Chart your course for Coast Day 2002! Discover the fascinating world of
marine science in lectures, visits to scientists in their labs, ship
tours, marine critter touch tanks, children's activities, a nautical
craft show, crab cake cook-off, seafood chowder challenge, delicious
seafood, and much more! The national award-winning daylong Coast Day
festival is now in its 26th year and is sponsored by the University of
Delaware Sea Grant College Program. For more information contact the
Marine Public Education Office, University of Delaware Sea Grant College
Program & Graduate College of Marine Studies, (302) 831-8083,
marinecom@udel.edu or visit the Coast Day website at:

October 13, 2002, Cape May, New Jersey
"A Celebration of the Sea," Coast Day NJ is dedicated to helping New
Jerseyans better understand and appreciate their sea and shore. Enjoy
deck and dock tours, touch-tanks, music, eco-tours, demonstrations and
"hands-on" interactive displays designed for participants of all ages.
Tour commercial fishing vessels; try on a fisherman's "survival suit"
and more all dedicated to New Jersey's marine and coastal environment.
Sponsored by New Jersey Sea Grant. For more information contact: Claire
Antonucci, New Jersey Marine Sciences Consortium, 732-872-1300 ext.22,
cantonucci@njmsc.org, or visit the Coast Day NJ website at:

Sea Grant is a nationwide network of 30 university-based programs that
works with coastal communities and is supported by NOAA.  Sea Grant
research and outreach programs promote better understanding,
conservation, and use of America's coastal resources.  For more
information about Sea Grant visit the Sea Grant Media Center Website at:
www.seagrantnews.org, which includes on-line keyword searchable database
of academic experts in over 30 topical areas.

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