The two
projects funded by the North Carolina Sea Grant Blue Crab
Research Program could boost the state's troubled blue-crab
industry by enhancing stocks, possibly even leading to
blue-crab aquaculture.
Ten months after putting
together the hatchery, Harcke can see the fruits of her
labor as about 100 juvenile crabs feast on frozen shrimp.
The crustaceans are one of the first groups of blue crabs in
the country to have successfully gone through eight molting
stages outside of their traditional surroundings.
"Our work shows it is
feasible to raise blue crabs through the juvenile stage in a
captivity setting," Harcke said as she stood in her small
laboratory cluttered with beakers, holding tanks and
microscopes.
To local crabber Murray
Bridges of Endurance Seafood, the work of the researchers
could translate into benefits for the blue-crab industry,
the state's most lucrative fishery.
"The more crabs you put in
the water, the better off you are," he said. "And it does
open the door for raising crabs as an aquaculture, just like
you raise fish like striped bass and catfish."
Blue-crab landing counts have
been down for the past three years, reaching about 55.9
million pounds in 1999, but plummeting to 30 million pounds
in 2001. N.C. Division of Marine Fisheries Biologist
Supervisor Sean McKenna said it's unclear whether the
decline is biologically or environmentally driven.
Harcke's $63,000 project and
Eggleston's $38,000 study are among a handful of projects
sponsored by the program, which is looking at ways to
enhance blue-crab stocks.
Eggleston's work involves
catching wild larvae with plankton nets and moving them to
underused nursery areas. While promising, Eggleston said,
the aquaculture of blue crabs is not without challenges.
Eric Johnson, an N.C. State
graduate student working with Eggleston, said blue-crab
aquaculture could allow crabbers to set the market time and
price by raising the crustaceans during the winter when
there is not much of a market. Crab shedders, he said, could
also operate their businesses year-round.
By
MICHELLE WAGNER