Why Study Continental Aquatic Systems? - Freshwater Ecology: Concepts and Environmental Applications - page 10

FIGURE 1.5 A logged watershed in the Pacific Northwest United States (courtesy of Christo-

pher Frissell).

Global Fisheries Production Relying on Freshwater a

TABLE 1.3

Amount Values

Type Year (100 metric tons) (millions of dollars)

Sturgeon, paddlefish 1993 10 105

River eels 1993 98 304

Freshwater mollusks 1993 319 351

Carps, barbels, and other cyprinids 1993 390 429

Talipias and other ciclids 1993 475 594

Freshwater crustaceans 1993 240 672

Miscellaneous 1993 4,200 1,890

Salmons, trouts, smelts 1993 868 2,517

Freshwater aquaculture 1992 9,125 14,322

a Data from the Food and Agriculture Administration (1995) and other sources.