Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size

ABSTRACT Size dispersion in farmed fish has a substantial impact on production’s bioeconomic performance, directly affecting net profits. This work’s objective was to develop a bioeconomic model based on experimental data to identify the optimal harvest time (OHT) for Nile tilapi...

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Autores principales:	Borrego-Kim,Patricia, Domínguez-May,Roger, Monroy-Borrego,Andrea G., Gullian-Klanian,Mariel
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2020
Materias:	Oreochromis niloticus tilapia bioeconomic size heterogeneity optimal harvest time aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000400602
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spelling	oai:scielo:S0718-560X20200004006022020-09-23Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable sizeBorrego-Kim,PatriciaDomínguez-May,RogerMonroy-Borrego,Andrea G.Gullian-Klanian,Mariel Oreochromis niloticus tilapia bioeconomic size heterogeneity optimal harvest time aquaculture ABSTRACT Size dispersion in farmed fish has a substantial impact on production’s bioeconomic performance, directly affecting net profits. This work’s objective was to develop a bioeconomic model based on experimental data to identify the optimal harvest time (OHT) for Nile tilapia Oreochromis niloticus. The bioeconomic model considered four minimum marketable sizes (Mms = 350, 400, 450, and 500 g). Organisms were selected by size with different coefficients of variation (CV). Therefore, they were reared under two growth strategies: heterogeneous size (HT = 44-155 g; CV 25.5%) and homogeneous size (HM = 87-112 g; CV 5.9%). The HT system-generated tradable biomass of 99.30% in an OHT of 196 days with a net profit of USD 3,551.61 and a Mms of 350 g. However, the HM system achieved greater marketable biomass (99.53%) in less time (OHT = 181 days) with a net profit of USD 3,327.96 for the same Mms. The Mms of 500 g had the lowest net benefit in both systems. The HM strategy earned an additional 10.66% of incomes, indicating that the reduction in size dispersion positively impacted profits. The developed model provides a new perspective regarding the management of heterogeneity and size homogeneity in commercial production of Nile tilapia in intensive systems.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.48 n.4 20202020-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000400602en10.3856/vol48-issue4-fulltext-2526
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Oreochromis niloticus tilapia bioeconomic size heterogeneity optimal harvest time aquaculture
spellingShingle	Oreochromis niloticus tilapia bioeconomic size heterogeneity optimal harvest time aquaculture Borrego-Kim,Patricia Domínguez-May,Roger Monroy-Borrego,Andrea G. Gullian-Klanian,Mariel Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size
description	ABSTRACT Size dispersion in farmed fish has a substantial impact on production’s bioeconomic performance, directly affecting net profits. This work’s objective was to develop a bioeconomic model based on experimental data to identify the optimal harvest time (OHT) for Nile tilapia Oreochromis niloticus. The bioeconomic model considered four minimum marketable sizes (Mms = 350, 400, 450, and 500 g). Organisms were selected by size with different coefficients of variation (CV). Therefore, they were reared under two growth strategies: heterogeneous size (HT = 44-155 g; CV 25.5%) and homogeneous size (HM = 87-112 g; CV 5.9%). The HT system-generated tradable biomass of 99.30% in an OHT of 196 days with a net profit of USD 3,551.61 and a Mms of 350 g. However, the HM system achieved greater marketable biomass (99.53%) in less time (OHT = 181 days) with a net profit of USD 3,327.96 for the same Mms. The Mms of 500 g had the lowest net benefit in both systems. The HM strategy earned an additional 10.66% of incomes, indicating that the reduction in size dispersion positively impacted profits. The developed model provides a new perspective regarding the management of heterogeneity and size homogeneity in commercial production of Nile tilapia in intensive systems.
author	Borrego-Kim,Patricia Domínguez-May,Roger Monroy-Borrego,Andrea G. Gullian-Klanian,Mariel
author_facet	Borrego-Kim,Patricia Domínguez-May,Roger Monroy-Borrego,Andrea G. Gullian-Klanian,Mariel
author_sort	Borrego-Kim,Patricia
title	Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size
title_short	Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size
title_full	Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size
title_fullStr	Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size
title_full_unstemmed	Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size
title_sort	bioeconomic modeling of optimal harvest time in nile tilapia (oreochromis niloticus) considering size heterogeneity and minimum marketable size
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000400602
work_keys_str_mv	AT borregokimpatricia bioeconomicmodelingofoptimalharvesttimeinniletilapiaoreochromisniloticusconsideringsizeheterogeneityandminimummarketablesize AT dominguezmayroger bioeconomicmodelingofoptimalharvesttimeinniletilapiaoreochromisniloticusconsideringsizeheterogeneityandminimummarketablesize AT monroyborregoandreag bioeconomicmodelingofoptimalharvesttimeinniletilapiaoreochromisniloticusconsideringsizeheterogeneityandminimummarketablesize AT gullianklanianmariel bioeconomicmodelingofoptimalharvesttimeinniletilapiaoreochromisniloticusconsideringsizeheterogeneityandminimummarketablesize
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Bioeconomic modeling of optimal harvest time in Nile tilapia (Oreochromis niloticus) considering size heterogeneity and minimum marketable size

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