Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10499-022-00912-9 http://hdl.handle.net/11449/241130 |
Resumo: | This article assesses strategies for managing the economic returns to an aquaponics production system with joint products of lettuce and tilapia. Experimental data from Brazil that varied fish stocking density and the fish feeding rate are analyzed using nonparametric efficiency testing methods to identify potentially profitable technologies and their sensitivities to prices of inputs and outputs. Plants and fish production are symbiotic in an aquaponics system, with fish waste providing nutrients for plant growth and plants helping maintain water quality for the fish via filtration. The optimal input/output mix among alternatives is identified, and sensitivity analysis is used to assess the price ranges around recent market conditions (0.18 R$/tilapia fingerling, 2.8 R$/kg for fish feed, 20 R$/kg for juvenile fish, and 1.57 R$/kg for lettuce) over which that technology choice remains optimal. The configuration of production controls is robust to price changes. Results show that at low fish stocking densities (100 fish/m3), the effluent in the water provides insufficient nutrients to plants. In addition, early lettuce harvests (before 26 days) are generally less efficient than treatments that allow more time for plant growth. Sensitivity analysis indicates that the optimality of the identified configuration of production controls is robust with respect to input and output prices. |
id |
UNSP_b2ee2fb0505602cee5d4c1aa923df088 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/241130 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in BrazilAquaponicsFeeding rateNonparametric efficiency analysisStocking densityTilapia and lettuce productionThis article assesses strategies for managing the economic returns to an aquaponics production system with joint products of lettuce and tilapia. Experimental data from Brazil that varied fish stocking density and the fish feeding rate are analyzed using nonparametric efficiency testing methods to identify potentially profitable technologies and their sensitivities to prices of inputs and outputs. Plants and fish production are symbiotic in an aquaponics system, with fish waste providing nutrients for plant growth and plants helping maintain water quality for the fish via filtration. The optimal input/output mix among alternatives is identified, and sensitivity analysis is used to assess the price ranges around recent market conditions (0.18 R$/tilapia fingerling, 2.8 R$/kg for fish feed, 20 R$/kg for juvenile fish, and 1.57 R$/kg for lettuce) over which that technology choice remains optimal. The configuration of production controls is robust to price changes. Results show that at low fish stocking densities (100 fish/m3), the effluent in the water provides insufficient nutrients to plants. In addition, early lettuce harvests (before 26 days) are generally less efficient than treatments that allow more time for plant growth. Sensitivity analysis indicates that the optimality of the identified configuration of production controls is robust with respect to input and output prices.Embrapa Fisheries and Aquaculture Embrapa, Prolongamento da Avenida NS 10, cruzamento com a Avenida LO 18, sentido Norte, loteamento Água Fria, TODepartment of Agricultural Economics Purdue University, 403 W. State St.Aquaculture Center of Unesp (Caunesp) São Paulo State University, Via de Acesso Professor Paulo Donato Castellane, s/n—Vila Industrial, SPLeibniz-Institute of Vegetable and Ornamental Crops (IGZ) Next-Generation Horticultural SystemsAquaculture Center of Unesp (Caunesp) São Paulo State University, Via de Acesso Professor Paulo Donato Castellane, s/n—Vila Industrial, SPEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Purdue UniversityUniversidade Estadual Paulista (UNESP)Next-Generation Horticultural SystemsFlores, Roberto Manolio ValladãoPreckel, Paul V.Quagrainie, KwamenaWidmar, Nicole OlynkSilva, Laura [UNESP]da Costa, Jesaias Ismael [UNESP]Pinho, Sara M. [UNESP]Portella, Maria Célia [UNESP]Branco, Thais CasteloFilho, Manoel Xavier Pedroza2023-03-01T20:48:29Z2023-03-01T20:48:29Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s10499-022-00912-9Aquaculture International.1573-143X0967-6120http://hdl.handle.net/11449/24113010.1007/s10499-022-00912-92-s2.0-85131573701Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAquaculture Internationalinfo:eu-repo/semantics/openAccess2024-04-09T15:37:13Zoai:repositorio.unesp.br:11449/241130Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-09T15:37:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
title |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
spellingShingle |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil Flores, Roberto Manolio Valladão Aquaponics Feeding rate Nonparametric efficiency analysis Stocking density Tilapia and lettuce production |
title_short |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
title_full |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
title_fullStr |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
title_full_unstemmed |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
title_sort |
Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil |
author |
Flores, Roberto Manolio Valladão |
author_facet |
Flores, Roberto Manolio Valladão Preckel, Paul V. Quagrainie, Kwamena Widmar, Nicole Olynk Silva, Laura [UNESP] da Costa, Jesaias Ismael [UNESP] Pinho, Sara M. [UNESP] Portella, Maria Célia [UNESP] Branco, Thais Castelo Filho, Manoel Xavier Pedroza |
author_role |
author |
author2 |
Preckel, Paul V. Quagrainie, Kwamena Widmar, Nicole Olynk Silva, Laura [UNESP] da Costa, Jesaias Ismael [UNESP] Pinho, Sara M. [UNESP] Portella, Maria Célia [UNESP] Branco, Thais Castelo Filho, Manoel Xavier Pedroza |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Purdue University Universidade Estadual Paulista (UNESP) Next-Generation Horticultural Systems |
dc.contributor.author.fl_str_mv |
Flores, Roberto Manolio Valladão Preckel, Paul V. Quagrainie, Kwamena Widmar, Nicole Olynk Silva, Laura [UNESP] da Costa, Jesaias Ismael [UNESP] Pinho, Sara M. [UNESP] Portella, Maria Célia [UNESP] Branco, Thais Castelo Filho, Manoel Xavier Pedroza |
dc.subject.por.fl_str_mv |
Aquaponics Feeding rate Nonparametric efficiency analysis Stocking density Tilapia and lettuce production |
topic |
Aquaponics Feeding rate Nonparametric efficiency analysis Stocking density Tilapia and lettuce production |
description |
This article assesses strategies for managing the economic returns to an aquaponics production system with joint products of lettuce and tilapia. Experimental data from Brazil that varied fish stocking density and the fish feeding rate are analyzed using nonparametric efficiency testing methods to identify potentially profitable technologies and their sensitivities to prices of inputs and outputs. Plants and fish production are symbiotic in an aquaponics system, with fish waste providing nutrients for plant growth and plants helping maintain water quality for the fish via filtration. The optimal input/output mix among alternatives is identified, and sensitivity analysis is used to assess the price ranges around recent market conditions (0.18 R$/tilapia fingerling, 2.8 R$/kg for fish feed, 20 R$/kg for juvenile fish, and 1.57 R$/kg for lettuce) over which that technology choice remains optimal. The configuration of production controls is robust to price changes. Results show that at low fish stocking densities (100 fish/m3), the effluent in the water provides insufficient nutrients to plants. In addition, early lettuce harvests (before 26 days) are generally less efficient than treatments that allow more time for plant growth. Sensitivity analysis indicates that the optimality of the identified configuration of production controls is robust with respect to input and output prices. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 2023-03-01T20:48:29Z 2023-03-01T20:48:29Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s10499-022-00912-9 Aquaculture International. 1573-143X 0967-6120 http://hdl.handle.net/11449/241130 10.1007/s10499-022-00912-9 2-s2.0-85131573701 |
url |
http://dx.doi.org/10.1007/s10499-022-00912-9 http://hdl.handle.net/11449/241130 |
identifier_str_mv |
Aquaculture International. 1573-143X 0967-6120 10.1007/s10499-022-00912-9 2-s2.0-85131573701 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Aquaculture International |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965431236132864 |