Sea. The principal parameters that determine the economic 



efficiency of investment are output and its value, lanor 



productivity, production costs and capital returns. 



Subject descriptors: 



Hatcheries; sturgeon; U.S.S.R.; method evaluation; benefit-cost 



analysis; economic concepts; methodology. 



SEAWEEDS 



162 



Dawes, Clinton J. 



1974. 



On the mariculture of the Florida seaweed, Eucheuma isiforme. 



Univ. S. Fla., Sea Grant Rep. No. 5, 10 pp. 



Biological information^ and growing demand for the specific 



product (iota carrageenan) from Eucheuma isiforme, along with 



comparison of yields from tank and field culture suggest that a 



carefully designed pilot project to ascertain costs and returns 



under cultured conditions is merited. Under the author's 



specified assumptions, gross revenue per sguare meter of growth 



area per year would be $9.72 for tank culture and SC.16 for 



dense, wild populations in the Florida keys. While the author 



discusses aspects of cost and production, he cautions that actual 



production under cultured conditions is necessary for determining 



economic feasibility. 



Subject descriptors: 



Seaweeds . 



163 



Doty, Maxwell S. ; Alvarez, Vicente B. 



1975. 



Status, problems, advances and economics of Eucheuma farms. 



Mar. Tech. Soc. J. 9(4): 30-35. 



Eucheuma farming has been successful only in the Philippines to 



date. While it is likely that this country could produce as mucn 



as twice last year's world supply, past interruptions of market 



flows in other countries suggest that economy and stanility might 



be achieved if production occurred in several economically and 



politically independent countries. Among the biological problems 



in farming are seasonality and senescence. A recently introduced 



strain may overcome part of the difficulty. Cost and return 



information is incomplete for any farm anywhere for a given year 



or farm cycle. Costs are low relative to gross revenue. For 



family farms the input is largely labor, with nominal capital 



investment, and labor opportunity costs are low. 



Subject descriptors: 



Seaweeds; Philippines; problems; revenue; costs. 



75 



