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[Duurzaamlijst] Fish farming drains seas, UBC fisheries expert says
On 20 Feb 2001, at 13:31, Transgenic Fish and Marine Life wrote:
Transgenic Fish and Marine Life (transgenicfish@iatp.org)
Posted:
02/20/2001 By satori@pubnix.net
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February
20, 2001
Fish farming drains seas, UBC fisheries expert says
Big fish eat little fish
National Post
SAN FRANCISCO - Carnivorous caged fish are helping to deplete
the
oceans, scientists say.
Salmon, the mainstay of Canadian aquaculture, are fed fish meal made
of
vast quantities of little fish
that are scooped out of the ocean, scientists told the annual meeting
of American Association for the
Advancement of Science.
"The new trend in aquaculture is to drain the seas to feed the
farms,"
says fisheries specialist Daniel
Pauly of the University of British Columbia. He presented a study
showing farming carnivorous species
like salmon, shrimp and tuna are contributing to the collapse of the
world's wild fisheries.
Traditional aquaculture -- in which fish such as carp and catfish eat
plants and organic wastes -- is fast
being replaced by intensive farming of larger, carnivorous fish,
which
can demand top dollar in Japan,
the United States and Europe. A single pound of salmon, or other
fish-eaters such as shrimp, tuna or
cod, demands two to five pounds of wild-caught fish as feed.
There are also worrisome trends in Asia, said Pauly, where catfish
and
carp are being fed fish meal
and fish oil so they grow faster.
The impacts on marine ecosystems "are clearly unsustainable," said
Pauly. He said the industry needs
to wean itself off fish-based feeds, often made from herring,
mackerel
and sardines.
One in four fish consumed in the world is now raised on farms, which
play an important role in feeding
Earth's six billion people.
Economist Rosamond Taylor, of Stanford University, told the
conference
she believes aquaculture can
do more good than harm. But one of the keys will be to become less
reliant on carnivorous species
and more dependent on vegetarians species, such as shellfish,
catfish,
carp and tilapia.
"People should be aware that they are not doing the environment a
favour at all by eating farmed
salmon," she says.
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