Economics and Business Management

Rhodes, Raymond J.

doi:10.1002/9780470999554.ch20

Cited by 13 publications

(17 citation statements)

References 27 publications

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“…In large farms, labor and energy costs are significantly higher, driving the portion of feed cost lower. Rhodes (2000) reported values ' Corresponding author. upahtech@yahOo.com of feed cost portions of the operating costs of the farms ranging between 5% in the USA to 52% in Malaysia with 41% in Brazil.…”

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Growout of Freshwater Prawn Macrobrachium rosenbergii in Fertilized Ponds with Reduced Levels of Formulated Feed

Correia

Pereira

Silva

et al. 2003

J World Aquaculture Soc

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Formulated feed for freshwater prawn farming under semi-intensive conditions is expensive, presenting a significant portion of the farm's operating costs. Production and availability of natural food in earthen ponds may reduce the needs for formulated feed. This paper evaluates growth of freshwater prawn Macrobrachiurn rosenbergii under three feeding regimes, where supplemental feed was reduced and natural productivity of the ponds was increased by a fertilization program that included the addition of lime, phosphorus and nitrogen. Prawns (4.35 g) were stocked into 12 50-mZ earthen ponds (6 juvenileslm*) and grown for 84 d feeding on 25% crude protein ration. Chemical and physical water parameters were monitored routinely. Growth and production were similar at 100% formulated feed supplementation with no fertilization and at 50% formulated feed with fertilization, as determined by weight gain, specific growth rate, and net yield (P > 0.05). However, further reduction in feed supplementation (0, 25%, and 50% of feeding rate, respectively, for each subsequent 28d period) with fertilization, yielded shrimp smaller than market size. Feed conversion ratios were significantly higher (P 5 0.05) for the 100% versus the 50% feed supplementation. 0

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Growout of Freshwater Prawn Macrobrachium rosenbergii in Fertilized Ponds with Reduced Levels of Formulated Feed

Correia

Pereira

Silva

et al. 2003

J World Aquaculture Soc

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“…Regardless of the importance of the hatchery segment for the M. rosenbergii production chain, the available literature on its economic aspects are scarce and outdated (Na-Nakorn & Jintasataporn, 2012;New, 1978;Rhodes, Hanson, & Dasgupta, 2010;Valenti & Daniels, 2000). The latter information states that commercial hatcheries in Asia and America normally adopt low stocking densities (50-100 larvae per L), requiring US$ 12.9-24 per thousand post larvae produced (Rhodes et al, 2010). In Brazil, hatcheries also adopt 50-100 larvae per L densities and reach an IRR of 15%-45% and PB of 3-5.5 years (Rhodes et al, 2010).…”

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“…In these locations, labour accounts for an average of 39% of annual operating costs (Rhodes et al, 2010). In Asia, where labour cost is lower than in the Occident, this cost represents~20% of the annual operating costs (Rhodes et al, 2010).…”

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“…In Brazil, the cost of postlarvae varies from US$20 to 50 per 1,000 PL, depending on the region and the amount acquired (Marques & Moraes-Valenti, 2012). In United States, postlarvae prices range from US$ 10 to 14 per 1,000 PL (Rhodes et al, 2010 New, 1978;Rhodes et al, 2010;Valenti & Daniels, 2000). The latter information states that commercial hatcheries in Asia and America normally adopt low stocking densities (50-100 larvae per L), requiring US$ 12.9-24 per thousand PL produced (Rhodes et al, 2010).…”

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confidence: 99%

“…The latter information states that commercial hatcheries in Asia and America normally adopt low stocking densities (50-100 larvae per L), requiring US$ 12.9-24 per thousand PL produced (Rhodes et al, 2010). In Brazil, hatcheries also adopt 50-100 larvae per L densities and reach an IRR of 15%-45% and PB of 3-5.5 years (Rhodes et al, 2010). Our results might be valid for countries where freshwater prawn farming is an important economic activity, but variations are expected according to their economic policies.…”

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Economic feasibility of intensification of Macrobrachium rosenbergii hatchery

et al. 2018

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Inadequate seed supply remains a bottleneck for the expansion of the Macrobrachium rosenbergii production industry. Nevertheless, the limitation is not technical, and thus, we presumed that fragile production chains and economic feasibility might be the major issues. Therefore, we investigated the intensification as a way to improve the system's profitability and resilience. We have reported relevant costs and revenues of hypothetical hatcheries stocking 50, 100, and 140 larvae per L in clear water recirculating systems. A Monte Carlo simulation assessed the risks associated with development and management. Data showed that all hatcheries are profitable. Nevertheless, 100 and 140 larvae per L reached better economic results than 50 larvae per L. With less than 40% of the selling price, high‐density hatcheries covered their costs and became profitable. The Monte Carlo simulation demonstrated that high‐density hatcheries are more resilient to production and marketing oscillations. However, the use of 140 larvae per L requires greater investment and is more susceptible to production risks and instabilities. Therefore, 100 larvae per L is the most appropriate stocking density for M. rosenbergii hatchery in clear water recirculating systems. Additionally, the scaled production, the adoption of realistic selling price, diversification of products and markets may strengthen the production chain and hatcheries resilience.

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Economics and Management of Freshwater Prawn Culture in Western Hemisphere

Valenti¹,

Tidwell²

2006

Shrimp Culture

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Economics and Business Management

Cited by 13 publications

References 27 publications

Growout of Freshwater Prawn Macrobrachium rosenbergii in Fertilized Ponds with Reduced Levels of Formulated Feed

Growout of Freshwater Prawn Macrobrachium rosenbergii in Fertilized Ponds with Reduced Levels of Formulated Feed

Economic feasibility of intensification of Macrobrachium rosenbergii hatchery

Economics and Management of Freshwater Prawn Culture in Western Hemisphere

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