Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica
The aim of this study was to determine the productivity and profitability of fattening freshwater prawns cultivated in two stocking densities in ponds, applying a simple and appropriate technology for the transfer of knowledge to producers. The study was carried out in 2019 on a farm in the province of Limón, Costa Rica. The fattening stage was carried out using densities of 2.5 and 6.0 shrimp/m2. The productions obtained were 758.9 and 961.2 kg/ha, respectively (p<0.01). Assuming 2.7 cycles per year, the potential productivity would be 2049 and 2595 kg/ha/year, respectively. Variable production costs were higher at 6.0/m2 than at 2.5/m2 due to the increase in the purchase of more seeds and feeds. The cost of the seed represented 69% of the total investment in low stocking density and 77% in the highest. Farm sales revenue was higher at 6.0/m2 than at 2.5/m2. However, the most profitable stocking density was 2.5/m2 because even with lower production, it showed a higher profit. Gross profits were higher in the lowest stocking density, and there was no profitability in the highest, due not only to the higher proportion of prawns with commercial size in the first stock, but also to the increase in the cost of production in the second, where the seed represented the greatest expense. The economic sensitivity study suggests the use of the seeding density of 2.5/m2 has higher profitability, an attractive IRR (48.6%), relatively less time to recover the investment (2.1 years), a positive NPV and a cost benefit ratio. 2.0 which means that for every dollar invested US$2.0 was generated.
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Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria
2020
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Valverde, José Varela, Alexander |
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Valverde, José Varela, Alexander Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica |
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Valverde, José Varela, Alexander |
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Valverde, José |
| title |
Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica |
| title_short |
Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica |
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Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica |
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Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica |
| title_full_unstemmed |
Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica |
| title_sort |
effect of stocking density on the productivity and profitability of the freshwater prawn macrobrachium rosenbergii in the fattening phase in ponds, costa rica |
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The aim of this study was to determine the productivity and profitability of fattening freshwater prawns cultivated in two stocking densities in ponds, applying a simple and appropriate technology for the transfer of knowledge to producers. The study was carried out in 2019 on a farm in the province of Limón, Costa Rica. The fattening stage was carried out using densities of 2.5 and 6.0 shrimp/m2. The productions obtained were 758.9 and 961.2 kg/ha, respectively (p<0.01). Assuming 2.7 cycles per year, the potential productivity would be 2049 and 2595 kg/ha/year, respectively. Variable production costs were higher at 6.0/m2 than at 2.5/m2 due to the increase in the purchase of more seeds and feeds. The cost of the seed represented 69% of the total investment in low stocking density and 77% in the highest. Farm sales revenue was higher at 6.0/m2 than at 2.5/m2. However, the most profitable stocking density was 2.5/m2 because even with lower production, it showed a higher profit. Gross profits were higher in the lowest stocking density, and there was no profitability in the highest, due not only to the higher proportion of prawns with commercial size in the first stock, but also to the increase in the cost of production in the second, where the seed represented the greatest expense. The economic sensitivity study suggests the use of the seeding density of 2.5/m2 has higher profitability, an attractive IRR (48.6%), relatively less time to recover the investment (2.1 years), a positive NPV and a cost benefit ratio. 2.0 which means that for every dollar invested US$2.0 was generated. |
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Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria |
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2020 |
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https://revistasinvestigacion.unmsm.edu.pe/index.php/veterinaria/article/view/18174 |
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oai:ojs.csi.unmsm:article-181742020-08-11T21:20:53Z Effect of stocking density on the productivity and profitability of the freshwater prawn Macrobrachium rosenbergii in the fattening phase in ponds, Costa Rica Efecto de la densidad de siembra en la productividad y rentabilidad del langostino Macrobrachium rosenbergii en la fase de engorde en estanques, Costa Rica Valverde, José Varela, Alexander prawns Macrobrachium rosenbergii planting density productivity profitability langostinos Macrobrachium rosenbergii densidad de siembra productividad rentabilidad The aim of this study was to determine the productivity and profitability of fattening freshwater prawns cultivated in two stocking densities in ponds, applying a simple and appropriate technology for the transfer of knowledge to producers. The study was carried out in 2019 on a farm in the province of Limón, Costa Rica. The fattening stage was carried out using densities of 2.5 and 6.0 shrimp/m2. The productions obtained were 758.9 and 961.2 kg/ha, respectively (p<0.01). Assuming 2.7 cycles per year, the potential productivity would be 2049 and 2595 kg/ha/year, respectively. Variable production costs were higher at 6.0/m2 than at 2.5/m2 due to the increase in the purchase of more seeds and feeds. The cost of the seed represented 69% of the total investment in low stocking density and 77% in the highest. Farm sales revenue was higher at 6.0/m2 than at 2.5/m2. However, the most profitable stocking density was 2.5/m2 because even with lower production, it showed a higher profit. Gross profits were higher in the lowest stocking density, and there was no profitability in the highest, due not only to the higher proportion of prawns with commercial size in the first stock, but also to the increase in the cost of production in the second, where the seed represented the greatest expense. The economic sensitivity study suggests the use of the seeding density of 2.5/m2 has higher profitability, an attractive IRR (48.6%), relatively less time to recover the investment (2.1 years), a positive NPV and a cost benefit ratio. 2.0 which means that for every dollar invested US$2.0 was generated. El objetivo del presente estudio fue determinar la productividad y rentabilidad del engorde de langostinos cultivados en dos densidades de siembra en estanques, aplicando una tecnología sencilla y apropiada para la transferencia de conocimientos a los productores. El estudio se llevó a cabo en 2019 en una finca acuícola en la provincia de Limón, Costa Rica. La etapa de engorde se realizó usando densidades de 2.5 y 6.0 langostinos/m2. Las producciones obtenidas fueron de 758.9 y 961.2 kg/ha, respectivamente (p<0.01). Asumiendo 2.7 ciclos al año, la productividad potencial sería de 2049 y 2595 kg/ha/año de manera respectiva. Los costos variables de producción fueron más altos a 6.0/m2 que a 2.5/m2 por el incremento en la compra de mayor cantidad de semilla y de alimento. El costo de la semilla representó el 69% de la inversión total en baja densidad de siembra y 77% en la más alta. Los ingresos por ventas en granja fueron más altos a 6.0/m2 que a 2.5/m2. No obstante, la densidad de siembra más rentable fue la de 2.5/m2 debido a que aún con una menor producción, dio una utilidad mayor. Las utilidades brutas fueron mayores en la densidad de siembra más baja, y no hubo rentabilidad en la más alta, debido no solo a la mayor proporción de langostinos con talla comercial en la primera densidad, sino también al aumento en el costo de producción en la segunda, donde la semilla representó el mayor gasto. El estudio de sensibilidad económica sugiere la utilización de la densidad de siembra de 2.5/m2 por tener mayor rentabilidad, una TIR (48.6%) atractiva, relativamente poco tiempo para recuperar la inversión (2.1 años), un VAN positivo y una relación beneficio costo de 2.0 lo que significa que por cada dólar invertido se generaron US$2.0. Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria 2020-08-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article application/pdf https://revistasinvestigacion.unmsm.edu.pe/index.php/veterinaria/article/view/18174 10.15381/rivep.v31i3.18174 Revista de Investigaciones Veterinarias del Perú; Vol. 31 No. 3 (2020); e18174 Revista de Investigaciones Veterinarias del Perú; Vol. 31 Núm. 3 (2020); e18174 1682-3419 1609-9117 spa https://revistasinvestigacion.unmsm.edu.pe/index.php/veterinaria/article/view/18174/15487 Derechos de autor 2020 José Valverde, Alexander Varela https://creativecommons.org/licenses/by-nc-sa/4.0 |