Data/hora: 10/06/2024 01:32:14

Biblioteca(s): 	Embrapa Pesca e Aquicultura.	
Data corrente: 	13/06/2022	
Data da última atualização: 	13/06/2022	
Autoria: 	FLORES, R. M. V.; PRECKEL, P. V.; QUAGRAINIE, K.; WIDMAR, N. O.; SILVA, L.; COSTA, J. I. da; PINHO, S. M.; PORTELLA, M. C.; CASTELO BRANCO, T.; PEDROZA FILHO, M. X.	
Afiliação: 	ROBERTO MANOLIO VALLADAO FLORES, CNPASA; PAUL V. PRECKEL, PURDUE UNIVERSITY; KWAMENA QUAGRAINIE, PURDUE UNIVERSITY; NICOLE OLYNK WIDMAR, PURDUE UNIVERSITY; LAURA SILVA, UNESP, Jaboticabal-SP; JESAIAS ISMAEL DA COSTA, UNESP, Jaboticabal-SP; SARA M. PINHO, UNESP, Jaboticabal-SP; MARIA CÉLIA PORTELLA, UNESP, Jaboticabal-SP; THAIS CASTELO BRANCO, PURDUE UNIVERSITY; MANOEL XAVIER PEDROZA FILHO, CNPASA.	
Título: 	Efficiency tests for screening production strategies in a lettuce-juvenile tilapia aquaponics system in Brazil.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	Aquaculture International, 2022.	
ISSN: 	0967-6120	
DOI: 	https://doi.org/10.1007/s10499-022-00912-9	
Idioma: 	Inglês	
Conteúdo: 	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 thantreatments that allow more time for plant growth. Sensitivity analysis indicates that the optimality of the identified configuration of production controls is robust with respect toinput and output prices.	
Palavras-Chave: 	Feeding rate; Nonparametric efficiency analysis; Stocking density; Tilapia and lettuce production.	
Thesagro: 	Nutrição Animal; Peixe; Tilápia.	
Thesaurus Nal: 	Aquaponics; Fish feeding.	
Categoria do assunto: 	E Economia e Indústria Agrícola	
Registro original: 	Embrapa Pesca e Aquicultura (CNPASA)	
Exemplares: 	CNPASA - (1161-1) - UPC - AP - DD - 2022 -  - 2022 - DIS