m 



Location 



Spedefl 



1.000 kg/ 



hectare/ 



yr" 



ionBlaerelyr 



Local Wholesale 

 value $U.S./acre 



III. CULTIVATION OF STOCKED OR NATURAL POPULATIONS, NO FERTILIZATION OR FEEDING 



United States oysters (national avg.) 



United States oysters (best yields) 



France flat oyster (national avg.) 



France Portuguese oyster (national avg.) . 



Australia oysters (national avg.) 



oysters (best yields) 



Japan* (Inland Sea) . oysters 



Malaya cockles 



France mussels 



Philippines mussels 



Spain* mussels 



Japan* Porphyra 



Japan* Undaria 



Singapore (elsewhere shrimp 



in Southeast Asia) 



IV. STOCKING AND CULTIVATION: FERTILIZATION, NO FliBDING 



Taiwan . mUkfish 0.10 0.04 



Israel, Southeast Asia. . carp (related species) 0. 125-0. 70 0. 05-0. 28 



Africa Tilapia 0. 40-1 20 0.16-0.48 



Java (sewage streams) _ carp 500-750 200-300 



Japan Chlorella.. 325 130 



V. STOCKING AND CULTIVATION: FERTILIZATION AND SUPPLEMENTAL FEEDING 



United States catfish 



China, Hong Kong carp (related species). 



Israel carp, mullet 



1,000 



VI. STOCKING AND CULTIVATION, RUNNING WATER, INTENSIVE FEEDING 



United States rainbow trout >2, 000 >800 



Japan carp 1,000-4,000 400-1,600 



Japan shrimp 6.0 2.4 



18, 000 



•Raft-culture calculations based on an area 25 per cent covered by rafts. To obtain yields for area actually involved in production, multi- 

 ply by 4. 

 "1,000 Kg. =2,204.6 lbs. 



1 hectare = 10,000m>=2.471 acres 



Source: John B. Rytber and John E. Bardacb, Status and Potential of Aquaculture, American Institute of Biological Sciences, Washing- 

 ton, D.C., May 1968, vol. I, p. 14. 



