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

dc.contributorBrazilian Ministry of Agriculture, Livestock and Supplyen-US
dc.contributorNational Council of Technological and Scientific Development (CNPq)en-US
dc.contributorBrazilian Micro and Small Business Support Service (SEBRAE)en-US
dc.contributorTocantins Research Foundation (FAPTO)en-US
dc.creatorFerreira Lima, Adriana
dc.date2020-03-03
dc.date.accessioned2020-11-05T13:36:43Z
dc.date.available2020-11-05T13:36:43Z
dc.identifierhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol48-issue1-fulltext-2334
dc.identifier10.3856/vol48-issue1-fulltext-2334
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/159230
dc.descriptionSize 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.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherPontificia Universidad Católica de Valparaísoen-US
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol48-issue1-fulltext-2334/1155
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol48-issue1-fulltext-2334/1685
dc.rightsCopyright (c) 2020 Latin American Journal of Aquatic Researchen-US
dc.sourceLatin American Journal of Aquatic Research; Vol 48, No 1 (2020); 38-46en-US
dc.sourcePlataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 48, No 1 (2020); 38-46es-ES
dc.source0718-560X
dc.source0718-560X
dc.subjectArapaima gigas; growth; production; management; size sorting; size variationen-US
dc.titleEffect of size grading on the growth of pirarucu Arapaima gigas reared in earthen pondsen-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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