Factory-fish farming.

Factory-Fish Farming

Number of different algicides, herbicides, pesticides, and
other chemical additives normally fed to farm-raised
salmon in 1989                                                        3

Number of being used in 2000                                         26

Time it takes, in catfish pond producing 5,000 kilograms
of fish per year, to drop 10 tons of waste into the water        1 YEAR

Average period of time a pond is used in raising catfish
for human consumption, before draining and refilling with
fresh water                                                     6 YEARS

PCB concentrations found in wild salmon, in a recent
study, in pg/g                                                    5,302

PCB concentrations found in farmed salmon                        51,216

Percentage of global production of fish and seafood coming
from aquaculture in 1970                                            3.9

Percentage coming from aquaculture in 2000                         27.3

Estimated amount of beef produced, worldwide, in 2002, in
metric tons                                                  49,700,000

Estimated amount of farmed fish produced in 2002             52,700,000

SOURCES: Chemical additives: National Warmwater Aquaculture Center,
Mississippi State University, and www.animalaid.org.uk; Catfish waste:
Craig S. Tucker and John A. Hargreave, "Effluents for Channel Catfish
Aquaculture Ponds," Mississippi State University, 1998; PCBs in salmon:
Chemosphere, Vol. 46(7), 2002; production percentages:
www.fishfarming.com; beef production: USDA; farmed fish production:
extrapolated from Fisheries Department, Food and Agriculture
Organization of the United Nations.