Effect of protein and lipids levels in a growth diet on adult whitebait Galaxias maculatus (Jenyns 1842)

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datacite.alternateIdentifier.citationBrazilian Journal of Biology, 83, 2023
datacite.alternateIdentifier.doi10.1590/1519-6984.252305
datacite.alternateIdentifier.issn1678-4375
datacite.creatorVega-Aguayo, Rolando
datacite.creatorDrake, C.
datacite.creatorGuzmán, V.
datacite.creatorMardones-Lazcano, Alfonso
datacite.creatorValdebenito, Iván
datacite.creatorDe Los Ríos Escalante, Patricio R.
datacite.creatorEncina-Montoya, Francisco
datacite.creatorBarile, Juan
datacite.date2023
datacite.rightsAcceso abierto
datacite.subjectGalaxias Maculatus
datacite.subjectGrowth
datacite.subjectLipid Diet
datacite.subjectProtein Diet
datacite.subjectLipid
datacite.subjectLipids
datacite.subjectLipid
datacite.subjectAnimal
datacite.subjectChile
datacite.subjectDiet
datacite.subjectFemale
datacite.subjectOsmeriformes
datacite.subjectVeterinary Medicine
datacite.subjectAnimals
datacite.subjectDiet
datacite.subjectFemale
datacite.subjectLipids
datacite.titleEffect of protein and lipids levels in a growth diet on adult whitebait Galaxias maculatus (Jenyns 1842)
datacite.title.alternativeEfeito dos níveis de proteína e lipídio em uma dieta de crescimento em whitebait Galaxias maculatus adulto (Jenyns 1842)pt
dc.contributor.authorMARDONES LAZCANO, ALFONSO EDUARDO
dc.contributor.authorVALDEBENITO ISLER, NEMESIO IVAN
dc.contributor.authorDE LOS RIOS ESCALANTE, PATRICIO RENE
dc.contributor.authorENCINA MONTOYA, FRANCISCO RAMON
dc.date.accessioned2025-10-06T14:21:45Z
dc.date.available2025-10-06T14:21:45Z
dc.description.abstractGalaxias maculatus aquaculture objectives is to produce millions of eggs. Wild females are small (2 g), have quick sexual maturity and low mean fecundity (500 eggs/female), requiring larger fishes with higher fecundity. This study aim is to evaluate experimentally the effect of the levels of protein, lipid and dietary energy on weight increases in adults. Five independent experiments were performed at different sequential time periods at the UCT hatchery, Chile. Specimens were obtained from a) Crystalline sea return specimen catches in the Tolten estuary (4 -6 cm, 0.3-0.4 g.). b) Hatchery cultured fish. Fish were fed by hand ad libitum. In experiments 1 to 4, pelleted diets were prepared with 3 to 5 levels of protein (treatments 27 up to 57%), crumble size, three 100 L fibre ponds replicates. In experiment 5 the effect of two lipid levels (8 and 21%) was evaluated with commercial extruded Salmon Nutra Starter isoproteic crumble 1 diet at 63%, replicated in 4 ponds. The results show: A tendency to increased weight in all sizes with an increased protein level in the pelleted diet.A maximal adult growth is obtained with a diet containing a minimum of 37% crude protein, with 40% the optimal value. A higher % protein in the diet or growth in weight lower feed conversion ratio. The feed conversion ratio in the extruded diet reaches up to 0.5 and in the pelleted vary from 0.7 to 1.5. Fish 0.6 g fed with 63% protein, extruded commercial diet with two different lipid levels (8 and 21%, 20.40 and 23.84 MJ kg-1, PE/TE 0.62 and 0.71) increased weight the first month 67 and 105% each. It has been established that high-energy diets with optimal levels of protein and lipid are a good short-term solution to obtain G. maculatus of higher weight. © 2022 Elsevier B.V., All rights reserved.
dc.description.ia_keywordprotein, diet, levels, weight, maculatus, lipid, were
dc.formatPDF
dc.identifier.issn1519-6984
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/6787
dc.language.isoen
dc.publisherInstituto Internacional de Ecologia (Brazil)
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceBrazilian Journal of Biology
dc.subject.ia_odsODS 14: Vida submarina
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Biológicas
dc.subject.ia_oecd3nBiología General
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2023
oaire.citationTitleBrazilian Journal of Biology
oaire.citationVolume83
oaire.fundingReferenceCONICYT ANID FONDECYT 1930134 (Regular), D96-I1071
oaire.fundingReferenceMECESUP UCT 0804
oaire.fundingReferenceUniversidad Católica de Temuco DIUCT 2004-03-1
oaire.licenseConditionObra bajo licencia Creative Commons Atribución 4.0 Internacional
oaire.licenseCondition.urihttps://creativecommons.org/licenses/by/4.0/
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
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uct.catalogadorjvu
uct.comunidadRecursos Naturalesen_US
uct.departamentoDepartamento de Ciencias Agropecuarias y Acuícolas
uct.departamentoDepartamento de Ciencias Ambientales
uct.facultadFacultad de Recursos Naturales
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionSCOPUS
uct.indizacionWOS
uct.indizacionDOAJ
uct.indizacionScIELO
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