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dc.contributor.authorBlanco, E. (Edurne) 
dc.contributor.authorReglero, P. (Patricia) 
dc.contributor.authorHernández-de-Rojas, A. (Alma) 
dc.contributor.authorOrtega-García, A. (Aurelio) 
dc.contributor.authorde-la-Gándara, F. (Fernando) 
dc.contributor.authorFolkvord, A.
dc.date.accessioned2020-06-22T17:17:36Z
dc.date.available2020-06-22T17:17:36Z
dc.date.issued2019
dc.identifier.issn0022-0981*
dc.identifier.urihttp://hdl.handle.net/10508/11448
dc.description.abstractNotochord flexion increases the swimming capacity of fish larvae, aids in the capture of mobile prey, and coincides with the timing of when the physiological capacities of larvae begin to develop significantly, allowing an early shift to piscivory. Therefore, reaching the flexion stage as soon as possible can be considered beneficial for the growth and survival of the larvae. Individual growth differences of larvae from the same cohort are very common before reaching flexion and the potential explanation is still unknown. In this study, we examined if the nutritional status of the larvae, measured by the RNA:DNA and DNA:DW ratios, explains the differences in the development of notochord flexion in laboratory-reared Atlantic bluefin tuna (ABFT; Thunnus thynnus) and Atlantic bonito (AB; Sarda sarda) larvae. Moreover, we described the ontogeny of the different stages and condition indices. The daily average condition of ABFT estimated by the RNA:DNA and DNA:DW ratios increased with larval age and developmental stage, whereas in AB it was not. In both species, bigger larvae at a specific age had higher nutritional condition than smaller larvae regardless of developmental stage. However, in ABFT the DNA:DW ratio indicated lower condition for the biggest larvae within developmental stages F0 (pre-flexion) and F3 (post-flexion). After removing the size effect, larger individuals of ABFT within flexion stages F1 and F2 had higher condition than any other larval stages, whereas in AB an indistinct trend within stages was found. Our results confirm that in ABFT the RNA:DNA ratio is correlated with faster development while the DNA:DW ratio is negatively correlated with the time to flexion. The trends found in the DNA:DW ratio points at cell growth mechanisms being a better indicator of larval condition that the RNA:DNA ratio. Our findings suggest that under culture, ad libitum conditions, larval nutritional conditions measured by nucleic acid ratios, might not be enough to explain developmental differences in fast growing species.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.subjectbonitoes_ES
dc.subjectSarda sardaes_ES
dc.subjectRNA:DNA ratioes_ES
dc.subjectDNA:DW ratioes_ES
dc.subjectlarval rearinges_ES
dc.subjectlarval developmentes_ES
dc.subjectflexiones_ES
dc.subjectgrowthes_ES
dc.titleThe effect of nutritional condition by two nucleic acid derived indices on the growth to post-flexion of Atlantic bluefin tuna and Atlantic bonito larvaees_ES
dc.typearticlees_ES
dc.identifier.bibliographicCitationJournal of Experimental Marine Biology and Ecology, 519. 2019: 151182-151182*
dc.description.versionVersión del editores_ES
dc.publisher.centreCentro Oceanográfico de Murciaes_ES
dc.relation.projectIDCERES 678193es_ES
dc.rights.accessRightsembargoedAccesses_ES
dc.description.impact2,263*
dc.identifier.doi10.1016/j.jembe.2019.151182
dc.subject.asfafish es_ES
dc.subject.asfamarine ecology es_ES
dc.subject.asfaoceanography es_ES
dc.subject.asfaecology es_ES
dc.subject.asfagrowth es_ES


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