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dc.contributor.authorBetancor, M.B.
dc.contributor.authorOrtega-García, A. (Aurelio) 
dc.contributor.authorde-la-Gándara, F. (Fernando) 
dc.contributor.authorVarela, J.L.
dc.contributor.authorTocher, D.R.
dc.contributor.authorMourente, G.
dc.date.accessioned2020-06-22T16:17:47Z
dc.date.available2020-06-22T16:17:47Z
dc.date.issued2019
dc.identifier.issn00448486
dc.identifier.urihttp://hdl.handle.net/10508/11443
dc.description.abstractMass mortality is still one of the main constraints in larval rearing of Atlantic bluefin tuna (Thunnus thynnus L.; ABT). Early data related to the feeding sequence of ABT larvae suggested that mortality observed during the first stages of life could be partly due to nutritional deficiencies. Previous studies demonstrated that copepods ap- peared to be a superior live prey compared to rotifers during the first 2 weeks of life. Our overarching aim was to evaluate different feeding strategies during first feeding of ABT larvae from a performance, compositional and molecular perspective. In order to do so, two groups of ABT larvae were fed with either copepod (Acartia tonsa; C) nauplii or rotifers (Brachionus rotundiformis; R) enriched with Algamac 3050® from mouth opening to 13 days after hatching (dah). After this, the group C-larvae was fed either Artemia enriched with Algamac 3050® (CA), Acartia nauplii and copepodites (CC) or sea bream (Sparus aurata) yolk-sac larvae (CY), while the R group were fed on Artemia enriched with Algamac 3050® (RA) up to 18 dah. At 13 dah, larvae fed copepods (C) had grown better than those fed enriched rotifers (R) although there were no significant differences in survival. ABT larvae fed R accumulated highest eicosapentaenoate (EPA) but lowest docosahexaenoate (DHA) and total n-3 long- chain polyunsaturated fatty acids (LC-PUFA) than C-fed larvae, reflecting the dietary contents. There was no activation in the expression of the enzymes involved in EPA and DHA biosynthesis. However, the different live prey showed regulation of transcription factor, digestive enzyme, lipid metabolism and oxidative stress genes. At 18 dah, larvae fed CY and CA treatments were largest in size, with larvae fed RA displaying the lowest growth, with no significant differences in survival among the dietary treatments. The highest DHA contents were found in ABT larvae fed CC and CY, whereas the lowest contents were found in RA-fed larvae. Indeed, larvae fed RA showed the highest level of the intermediate product n-3 docosapentaenoate, which could reflect increased activity of the biosynthetic pathway although this was not supported by gene expression data.es_ES
dc.language.isoenges_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectatún rojoes_ES
dc.subjectbluefin tunaes_ES
dc.subjectThunnus thynnuses_ES
dc.subjectlarval rearinges_ES
dc.subjectRotiferses_ES
dc.subjectCopepodses_ES
dc.subjectArtemiaes_ES
dc.subjectYolk sac larvaees_ES
dc.subjectLipid metabolismes_ES
dc.subjectDigestibilityes_ES
dc.subjectAntioxidant statuses_ES
dc.subjectGene expressiones_ES
dc.titleEvaluation of different feeding protocols for larvae of Atlantic bluefin tuna (Thunnus thynnus L.)es_ES
dc.typearticlees_ES
dc.identifier.bibliographicCitationAquaculture, 505. 2019: 523-538*
dc.description.versionVersión del editores_ES
dc.publisher.centreCentro Oceanográfico de Murciaes_ES
dc.relation.projectIDNUTRITUNA AGL2014-52003-C2-1-Res_ES
dc.rights.accessRightsembargoedAccesses_ES
dc.description.impact2,041*
dc.identifier.doi10.1016/j.aquaculture.2019.02.063
dc.subject.asfafish es_ES
dc.subject.asfadigestibility es_ES
dc.subject.asfayolk es_ES
dc.subject.asfarearing es_ES


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