[pf] farmed fish use wild-fish-meal.

· I had never thought of the source of the meal fed on fish farms.  D.

 [contains: "a single pound of fish-eating species such as shrimp, salmon,
tuna or cod demands two to five pounds of wild caught fish that is
processed into meal and oil for feeds."]

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http://ens.lycos.com/ens/feb2001/2001L-02-21-06.html :-

Aquaculture May Be Fishing for Trouble
  starts:

 - New studies released this week reveal that farmed fish and shellfish,
which form a growing percentage of the seafood consumed around the globe,
may pose unexpected risks to wild species, as well as to the environments
in which they are raised. 

At the American Association for the Advancement of Science (AAAS) meeting
in San Francisco this week, an international group of scientists presented
new findings on the unintended impacts of fish farming that put both oceans
and the aquaculture industry at risk. 

Dr. Daniel Pauly of the University of British Columbia Fisheries Centre
released a new global study, "Farming Up Marine Food Webs," showing that
major sectors of the booming aquaculture industry are literally feeding on
world fisheries. 
Aquaculture, the fastest growing sector of the world food economy, is
increasing by 11 percent a year. Many people expect this growth to relieve
pressure on ocean fish stocks, most of which are now fished beyond
capacity, and to provide a reliable source of food to a world population
that adds 78 million people each year. 

But paradoxically, Pauly's new study shows that the increasing trend toward
farming carnivorous fish means that many types of aquaculture are
contributing to a worldwide collapse of wild fisheries. 

Production of a single pound of fish-eating species such as shrimp, salmon,
tuna or cod demands two to five pounds of wild caught fish that is
processed into meal and oil for feeds. 

Pauly previously discovered a global pattern of fishing down the food
chain, putting more pressure on lower level species as the bigger
carnivorous fish are depleted. His new analysis demonstrates that the mean
trophic level, or relative position of organisms within food chains, of
farmed fish has been rapidly increasing in almost all regions of the world
outside Asia. 

Tilapia is among the most common - and most sustainable - farm raised fish

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sent to Pos Fut list by David.

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