Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds

ABSTRACT Size grading is a common management practice in fish farming to minimize growth variability. Such practice has not been established for pirarucu Arapaima gigas. Therefore, the present study assessed the effect of size grading on the growth of pirarucu. Juvenile pirarucu were divided into th...

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Autor principal:	Lima,Adriana Ferreira
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2020
Materias:	Arapaima gigas growth production management size sorting size variation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000100038
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spelling	oai:scielo:S0718-560X20200001000382020-05-25Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen pondsLima,Adriana Ferreira Arapaima gigas growth production management size sorting size variation ABSTRACT Size grading is a common management practice in fish farming to minimize growth variability. Such practice has not been established for pirarucu Arapaima gigas. Therefore, the present study assessed the effect of size grading on the growth of pirarucu. Juvenile pirarucu were divided into three groups: ungraded fish (U: mean initial weight 1.12 kg), small fish (S: mean initial weight 0.81 kg), and large fish (L: mean initial weight 1.36 kg), and reared for 129 days (phase I) and 158 additional days (phase II), consecutively. No significant difference was observed in the final length, specific growth rate, biomass, survival and feed conversion rate between fish groups. Ungraded fish presented a greater decrease in the coefficient of variation for weight in phase I than in phase II. Size sorting resulted in significantly higher growth after 287 days of farming in the L-graded fish (9.49 kg, final weight), followed by the ungraded group (8.80 kg) and S-graded group (8.01 kg). However, the mean weight of pooled S- and L-graded fish was similar to the ungraded fish group in phase I and phase II, indicating that grading did not improve the general performance of pirarucu in captivity.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.1 20202020-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000100038en10.3856/vol48-issue1-fulltext-2334
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Arapaima gigas growth production management size sorting size variation
spellingShingle	Arapaima gigas growth production management size sorting size variation Lima,Adriana Ferreira Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds
description	ABSTRACT Size grading is a common management practice in fish farming to minimize growth variability. Such practice has not been established for pirarucu Arapaima gigas. Therefore, the present study assessed the effect of size grading on the growth of pirarucu. Juvenile pirarucu were divided into three groups: ungraded fish (U: mean initial weight 1.12 kg), small fish (S: mean initial weight 0.81 kg), and large fish (L: mean initial weight 1.36 kg), and reared for 129 days (phase I) and 158 additional days (phase II), consecutively. No significant difference was observed in the final length, specific growth rate, biomass, survival and feed conversion rate between fish groups. Ungraded fish presented a greater decrease in the coefficient of variation for weight in phase I than in phase II. Size sorting resulted in significantly higher growth after 287 days of farming in the L-graded fish (9.49 kg, final weight), followed by the ungraded group (8.80 kg) and S-graded group (8.01 kg). However, the mean weight of pooled S- and L-graded fish was similar to the ungraded fish group in phase I and phase II, indicating that grading did not improve the general performance of pirarucu in captivity.
author	Lima,Adriana Ferreira
author_facet	Lima,Adriana Ferreira
author_sort	Lima,Adriana Ferreira
title	Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds
title_short	Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds
title_full	Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds
title_fullStr	Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds
title_full_unstemmed	Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds
title_sort	effect of size grading on the growth of pirarucu arapaima gigas reared in earthen ponds
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=S0718-560X2020000100038
work_keys_str_mv	AT limaadrianaferreira effectofsizegradingonthegrowthofpirarucuarapaimagigasrearedinearthenponds
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Effect of size grading on the growth of pirarucu Arapaima gigas reared in earthen ponds

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