By Raymond C. Loehr

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Extra resources for Agricultural Waste Management: Problems, Processes, and Approaches

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Future fertilizer consumption may not continue at this rate due to environmental concern and possible higher prices. 12 M a j o r United States Seafood C a t c h e s 0 Average catch 1962-66 (10 tons) Fish 6 Type Small, oily fish' B o t t o m fish Salmon Tuna Crab Species Menhaden Shrimp Blue c r a b Sea herring Pink salmon c " F r o m reference 19. M e n h a d e n , mackerel, anchovies, herring, alewives. H a d d o c k , cod, ocean perch, whiting, flounder, h a k e , pollock. b c 2094 628 335 305 289 1753 225 160 143 141 2.

Public consumption of shrimp and tuna is likely to increase at more rapid rates than that of other seafoods. The catfish industry has the potential to develop along lines analogous to that of livestock production. Farm pond grown catfish are grown in southern and south central states. Intensive catfish farming began in a significant manner in the 1960's. Commercial catfish pond acreage increased from about 400 acres in 1960 to 45,000 in 1970 and with about 75,000 acres forecast in 1975 (20). Yields per acre increased from about 800 to 1200 lb during that period and is expected to further increase in the future.

38 2. Changing Practices in Agriculture Fig. 7. Mechanical harvesting of potatoes (courtesy U . S . D e p t . of Agriculture). Frozen fish products are increasing in popularity and a 150% increase has been predicted in the next 15 years. The annual United States per capita consumption of seafood has been about 11 lb per year for the past 20 years. The major geographic seafood production regions in waters adjacent to the United States are those of the Gulf states, South Atlantic and Chesapeake Bay states, North and Middle Atlantic states, California, Alaska, and Oregon and Washington.

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