Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station

The carp polyculture production system is the most widely used system by small-scale fish farmers in southern Brazil (States of Paraná, Santa Catarina and Rio Grande do Sul). The aim of this study was to compare biotechnical and economic parameters between a farm system (FS) using farm inputs (chick...

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Autores principales:	Hernández,Martha, Gasca-Leyva,Eucario, Gressler,Pablo, Krise,Dione
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
Materias:	carp polyculture feed water quality cost-benefit aquaculture Brazil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300007
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spelling	oai:scielo:S0718-560X20140003000072014-10-10Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field stationHernández,MarthaGasca-Leyva,EucarioGressler,PabloKrise,Dione carp polyculture feed water quality cost-benefit aquaculture Brazil The carp polyculture production system is the most widely used system by small-scale fish farmers in southern Brazil (States of Paraná, Santa Catarina and Rio Grande do Sul). The aim of this study was to compare biotechnical and economic parameters between a farm system (FS) using farm inputs (chicken manure, maize and grass) and a commercial system (CS) using commercial inputs (triple super phosphate, ammonium nitrate and balanced food) feeding to apparent satiation. The experiment was carried out for 196 days in earthen ponds of 500 m², with three replicates per system. The stocking density was 2,000 fish ha-1, consisting of 35% grass carp (Ctenopharyngodon idella), 30% of mirror common carp (Cyprinus carpio var. specularis), 20% of bighead carp (Aristichthys nobilis) and 15% silver carp (Hypophthalmichthys molitrix). In both systems, a low level of total phosphorus in water (0.06 mg L-1) and in the sediment (4 mg L-1) was observed. Production was significantly increased in the CS (76 kg 500 m(-2)196 days-1) than in the FS (43 kg 500 m-2 196 days-1). Costs and revenues were higher in the CS and profits were similar in the two systems. Similar profits do not mean that CS is necessarily more convenient. Advantages and drawbacks for small-scale farmers considering labor, land and availability of money are discussed.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.3 20142014-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300007en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	carp polyculture feed water quality cost-benefit aquaculture Brazil
spellingShingle	carp polyculture feed water quality cost-benefit aquaculture Brazil Hernández,Martha Gasca-Leyva,Eucario Gressler,Pablo Krise,Dione Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
description	The carp polyculture production system is the most widely used system by small-scale fish farmers in southern Brazil (States of Paraná, Santa Catarina and Rio Grande do Sul). The aim of this study was to compare biotechnical and economic parameters between a farm system (FS) using farm inputs (chicken manure, maize and grass) and a commercial system (CS) using commercial inputs (triple super phosphate, ammonium nitrate and balanced food) feeding to apparent satiation. The experiment was carried out for 196 days in earthen ponds of 500 m², with three replicates per system. The stocking density was 2,000 fish ha-1, consisting of 35% grass carp (Ctenopharyngodon idella), 30% of mirror common carp (Cyprinus carpio var. specularis), 20% of bighead carp (Aristichthys nobilis) and 15% silver carp (Hypophthalmichthys molitrix). In both systems, a low level of total phosphorus in water (0.06 mg L-1) and in the sediment (4 mg L-1) was observed. Production was significantly increased in the CS (76 kg 500 m(-2)196 days-1) than in the FS (43 kg 500 m-2 196 days-1). Costs and revenues were higher in the CS and profits were similar in the two systems. Similar profits do not mean that CS is necessarily more convenient. Advantages and drawbacks for small-scale farmers considering labor, land and availability of money are discussed.
author	Hernández,Martha Gasca-Leyva,Eucario Gressler,Pablo Krise,Dione
author_facet	Hernández,Martha Gasca-Leyva,Eucario Gressler,Pablo Krise,Dione
author_sort	Hernández,Martha
title	Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
title_short	Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
title_full	Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
title_fullStr	Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
title_full_unstemmed	Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
title_sort	effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300007
work_keys_str_mv	AT hernandezmartha effectsoffarmandcommercialinputsoncarppolycultureperformanceparticipatorytrialinanexperimentalfieldstation AT gascaleyvaeucario effectsoffarmandcommercialinputsoncarppolycultureperformanceparticipatorytrialinanexperimentalfieldstation AT gresslerpablo effectsoffarmandcommercialinputsoncarppolycultureperformanceparticipatorytrialinanexperimentalfieldstation AT krisedione effectsoffarmandcommercialinputsoncarppolycultureperformanceparticipatorytrialinanexperimentalfieldstation
_version_	1714205126535675904

Effects of farm and commercial inputs on carp polyculture performance: participatory trial in an experimental field station

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