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Review of the economics of fish farming and culture-based fisheries in Ghana







Wijkstrom, U.N.; Vincke, M.M.J. Mar 1991. Review of the economics of fish farming and culture-based fisheries in Ghana - Based on the work of Ulf N. Wijkstrom, M.M.J. Vincke. Rome (Italy). 23 p.


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    Inland fish farming alternatives for Ghana: technical and economic aspects 1991
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    The purpose of this report is to identify those fish farming alternatives which are best suited to Ghanaian conditions. The perspective is that of the next ten years. In order to identify these alternatives, the authors review: species, culture systems and their economic consequences, water needs and costs, supply of fingerlings and finally specify the physical and economic aspects of the culture systems. The report does not discuss the markets for the fish produced in the fish farm; that is done in Field Technical Report 3 Neither does it discuss the economic availability of inputs; that is done in Field Working Paper 4. However, the analysis of this report rests on the conclusions of those two sections.
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    Thai freshwater prawn and brine shrimp farming. Report on a study of economics, marketing and processing requirements 1980
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    Freshwater prawn (Macrobrachium rosenbergil) farming is a rapidly expanding industry in Thailand. The production of both post-larvae and marketable prawn increased about 80 percent between 1979 and 1980. Currently the industry consists of 59 hatcheries and at least 455 farms utilizing approximately 2,346 rai (375 hectares) of land. Current hatchery production exceeds 25 million post-larvae per year with a potential production of over 100 million. The total production of marketable prawn in 1980 is estimated to be about 350 tons with a total retail value of nearly 70 million Baht ($3.5 million). Thailand is already a leader in terms of total land used for freshwater prawn production including Hawaii. Since culture technology is not expected to be a limiting factor for expansion, the future development of this industry depends mainly on its economic viability and the market potential for locally produced prawn. The economic viability of this industry was evaluated mainly based on the d ata collected from a field survey. The production efficiency of both hatchery and grow–out farm operations in Thailand is relatively low. The productivity per unit of Artemia (the most important food for juvenile prawn) used in the hatchery is only about half that in Hawaii, and the production of marketable prawn per unit of pond area is only one-third. However, despite the low productivities, all of the hatcheries and farms interviewed are currently making a good profit mainly because of the re latively low cost of inputs and the prevailing high price of prawn. The average rate of return to initial investment is high for both hatchery and grow-out farm operations. In most cases, the initial investment can be paid off within the second year of operation. However, this situation will change if the production exceeds the demand resulting in a lower price for prawn and hence lower profit.

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