Produção de Pacu em tanques-rede no reservatório de itaipu, Brasil: retorno econômico

Silva, J.R.; Rabenschlag, Denis Rasquin; Feiden, Aldi; Boscolo, Wilson Rogério; Signor, Arcângelo Augusto; Bueno, Guilherme Wolff

doi:10.4321/s0004-05922012000200009

Cited by 11 publications

(5 citation statements)

References 4 publications

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“…Em projeto de cultivo de tambaqui, Vilela et al (2013) Total custos variáveis (R$) Brabo et al (2013) consideram que o valor desse índice torna o empreendimento desejável economicamente. Silva et al (2012) avaliam que, por meio da soma das entradas de caixa do período estipulado, o VPL apresentado mostra que o projeto é viável, pois além de atingir o mínimo esperado o projeto gera um ganho de R$ 2.759,55 reais ao longo de todo o projeto, considerando seu custo de capital. Para resultados positivos, ou seja, um VPL > 0, Vasconcelos et al (2010) consideram que as receitas líquidas são superiores ao investimento inicial realizado, logo, o projeto é considerado economicamente viável.…”

Section: Resultsunclassified

“…Para Vasconcelos et al (2010), Silva et al (2012) e Brabo et al (2013) a Taxa Interna de Retorno superior a Taxa Mínima de Atratividade, considerada 6% (aplicação do recurso na caderneta de poupança), gera a expectativa de um maior ganho no empreendimento, logo é economicamente viá-vel. Segundo os pesquisadores Araújo et al (2011), a TIR igual a 19,40% significa que o capital alocado no projeto suporta uma elevação da taxa de desconto de até 19,40% ao ano, para cada ano do horizonte de análise do projeto, ou seja, o referido investimento só será inviável se a taxa média de juros de mercado atingir valores superiores aos da referida TIR.…”

Section: Resultsunclassified

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Utilização De Indicadores De Viabilidade Econômica Na Produção De Tilápia (Oreochromis Niloticus) Em Sistema De Recirculação: Estudo De Caso De Uma Piscicultura De Pequena Escala Em Parnaíba-Pi

Santos-Filho¹,

Vieira-Santos²,

Silva³

et al. 2017

OR&A

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RESUMOO presente trabalho teve como objetivo analisar a viabilidade econômica referente a um cultivo de tilápia (Oreochromis niloticus) de pequena escala, utilizando sistema de recirculação de água, localizado no município de Parnaíba-PI. Foram verificados dados referentes a 2 ciclos de produção de tilápia, utilizando-se 3 tanques de alvenaria de dimensões 2,5 x 5,7 x 0,7 metros, com peso final de comercialização de 500 gramas. Estimou-se a produção anual de 660 quilogramas após dois ciclos de engorda de 165 dias por ciclo. Foram analisados indicadores como receita bruta, lucro operacional, margem bruta, índice de lucratividade, ponto de nivelamento, valor presente líquido, relação benefício custo, Payback, taxa interna de retorno e análise de sensibilidade. O custo de implantação da piscicultura foi de R$ 9.370,94. ABSTRACTThis study aimed to analyze the economic viability of tilapia farming (Oreochromis niloticus) using a small-scale recirculating water system in the municipality of Parnaiba-PI, Brazil. We verified the marketing data regarding the economic viability of two production cycles, using three 2.5 x 5.7 x 0.7 meter tankss, with a final weight of 500 grams. With the data obtained, the annual production of 660 kg after two cycles of fattening of 165 days were estimated. Indicators such as gross revenue, operating income, gross margin, profitability index, leveling point, net present value, benefit cost ratio, payback, internal rate of return and sensitivity analysis were analyzed. The implementation cost was of R$ 9,370.94. Given that the return investment will occur in the sixth month of the fifth year, the Net Present Value (NPV) is of R$ 2.759.55, the leveling point is of 38.20% and the Internal Rate of Return (IRR) will be of 19.40%. With this, the project can be considered economically viable, provided it is not the only source of family income, since it is able to generate a monthly income equivalent to R$ 226.91. Palavras-chave:Valor Presente Líquido, Taxa Interna de Retorno, Ponto de Nivelamento.

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Section: Resultsunclassified

Utilização De Indicadores De Viabilidade Econômica Na Produção De Tilápia (Oreochromis Niloticus) Em Sistema De Recirculação: Estudo De Caso De Uma Piscicultura De Pequena Escala Em Parnaíba-Pi

Santos-Filho¹,

Vieira-Santos²,

Silva³

et al. 2017

OR&A

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“…The maximum phosphorus load from the Pacu (P. mesopotamicus) production was estimated based on the maximum allowable phosphorus load, and according to the methodology described by Beveridge (2004). For this purpose, a production system of 160 cages measuring 5 m 3 , with 75 kg m À3 of fish productivity, 2.49 feed conversion, and total consumption of 149 400 kg of feed (Signor et al, 2011;Silva et al, 2012) was considered:…”

Section: Assessment Of the Carrying Capacitymentioning

confidence: 99%

“…where P e is phosphorus contribution per ton of fish produced, P f is phosphorus concentration in the feed provided (kg ton À1 ) calculated according to Signor et al (2011), FCR is feed conversion according to Silva et al (2012), and Pa is phosphorus amount in whole fish estimated according to Signor et al (2011).…”

Section: Assessment Of the Carrying Capacitymentioning

confidence: 99%

Spatial and temporal limnological changes of an aquaculture area in a neotropical reservoir

Lewandowski

Bridi²,

Bittencourt³

et al. 2018

Ann. Limnol. - Int. J. Lim.

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This study evaluated the spatial and temporal limnological characteristics of an aquaculture area in the Itaipu reservoir, Brazil. During a one-year period, water quality parameters were evaluated in seven collection sites using a fish culture system as the reference point. A regression analysis was performed on water transparency versus chlorophyll a and total phosphorus versus chlorophyll a. The trophic state index (TSI) was calculated using data from water transparency, chlorophyll a, and total phosphorus. In addition, a study of the carrying capacity was conducted in situations of high and low flow and rainfall based on 725 m3 s−1 and 298 mm and 34.5 m3 s−1 and 11 mm, respectively. No difference was observed in the parameters of water quality and the TSI in relation to the collection sites; these parameters only varied significantly throughout the seasons. The regression analysis showed that increased total phosphorus in the environment leads to increase in chlorophyll a concentrations and consequently decreased water transparency. Evaluation of the carrying capacity demonstrated that under conditions of high precipitation and flow it is possible to produce 623.7 tons of fish per year, which is above the total cultivated in fish farms at the study site.

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“…In the same location (Itaipu reservoir), Hilbig et al (2012) suggested a decrease in 30% of the total feeding supply for Pacu production in a fish cage. Other studies that guarantee profitability of Pacu production in fish cages located in reservoirs have also been performed, approaching nutrition, production indexes and the minimum scale of Pacu farming (Silva et al, 2012;Signor et al, 2013).…”

Section: Regulations and Main Species Produced In Fish Cages In Brazilmentioning

confidence: 99%

Opportunities and challenges for fish culture in Brazilian reservoirs: a review

2018

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Aim Aquaculture plays an important role in the world and in Brazil. Artificial construction of water bodies, such as ponds and reservoirs, has allowed for fish culture in cages in those environments, generating conflicts over the use of these public waters. The producers are seeking to increase production, and the ecosystem is susceptible to the impacts caused by production activity. The aim of this review was to identify questions about these conflicts (productivity × environment) and to indicate possible solutions to the main problems related to fish farming in reservoirs. Methods A bibliographical survey was carried out on the main aspects of cage fish farming in Brazilian reservoirs. Studies from 1977 to 2018 (scientific journals, books, and thesis) were revised using seven databases, the CAPES periodicals portal and Google Scholar websites. The main keywords used were “aquaculture”, “reservoir”, “cage”, “eutrophication”, “carrying capacity”, “impacts”, “oligotrophic”, “escapes”, “hybrids”, and “pollution”. Results We accessed approximately 330 and cited 151 documents. Conclusions The negative aspects associated with cage fish farming, as escapes of cultivated fish, and the possible solutions of this and others negative impacts were addressed, identifying mechanisms for reducing conflicts between environmental impacts and aquaculture production. Potential solutions include the use of native fish species or sterile species, implementation of monitoring systems of the surrounding area, adoption of measures to reduce the accidental escape of fish, use of multitrophic culture systems, use of highly digestible diets with appropriate food management, and use of computer programs that incorporate current and historical environmental data to calculate carrying capacity and choose the most appropriate location for production.

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Produção de Pacu em tanques-rede no reservatório de itaipu, Brasil: retorno econômico

Cited by 11 publications

References 4 publications

Utilização De Indicadores De Viabilidade Econômica Na Produção De Tilápia (Oreochromis Niloticus) Em Sistema De Recirculação: Estudo De Caso De Uma Piscicultura De Pequena Escala Em Parnaíba-Pi

Utilização De Indicadores De Viabilidade Econômica Na Produção De Tilápia (Oreochromis Niloticus) Em Sistema De Recirculação: Estudo De Caso De Uma Piscicultura De Pequena Escala Em Parnaíba-Pi

Spatial and temporal limnological changes of an aquaculture area in a neotropical reservoir

Opportunities and challenges for fish culture in Brazilian reservoirs: a review

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