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On the edge of death: Rates of decline and lower thresholds of biochemical condition in food-deprived fish larvae and juveniles

2012Journal article Restricted access
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dc.contributor.authorMeyer, S.
dc.contributor.authorCaldarone, E. M.
dc.contributor.authorChícharo, M. A.
dc.contributor.authorClemmesen, C.
dc.contributor.authorFaria, A.M.
dc.contributor.authorFaulk, C.
dc.contributor.authorFolkvord, A.
dc.contributor.authorHolt, G. J.
dc.contributor.authorHøie, H.
dc.contributor.authorKanstinger, P.
dc.contributor.authorMalzahn, A.
dc.contributor.authorMoran, D.
dc.contributor.authorPetereit, C.
dc.contributor.authorStøttrup, J.G.
dc.contributor.authorPeck, M.A.
dc.date.accessioned2021-05-26T15:22:32Z
dc.date.available2021-05-26T15:22:32Z
dc.date.issued2012
dc.description.abstractGaining reliable estimates of how long fish early life stages can survive without feeding and how starvation rate and time until death are influenced by body size, temperature and species is critical to understanding processes controlling mortality in the sea. The present study is an across-species analysis of starvation-induced changes in biochemical condition in early life stages of ninemarine and freshwater fishes. Datawere compiled on changes in body size (dry weight, DW) and biochemical condition (standardized RNA–DNA ratio, sRD) throughout the course of starvation of yolk-sac and feeding larvae and juveniles in the laboratory. In all cases, themean biochemical condition of groups decreased exponentially with starvation time, regardless of initial condition and endogenous yolk reserves. A starvation rate for individuals was estimated from discrete 75th percentiles of sampled populations versus time (degree-days, Dd). The 10th percentile of sRD successfully approximated the lowest, life-stage-specific biochemical condition (the edge of death). Temperature could explain 59% of the variability in time to death whereas DW had no effect. Species and life-stage-specific differences in starvation parameters suggest selective adaptation to food deprivation. Previously published, interspecific functions predicting the relationship between growth rate and sRD in feeding fish larvae do not apply to individuals experiencing prolonged food deprivation. Starvation rate, edge of death, and time to death are viable proxies for the physiological processes under food deprivation of individual fish pre-recruits in the laboratory and provide useful metrics for research on the role of starvation in the sea.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMeyer, S., Caldarone, E. M., Chicharro, M. A., Clemmesen, C., Faria, A. M., Faulk, C., Folkvord, A.; Holt, G. J.; Høie, H.; Kanstinger, P; Malzahn, A.; Moran, D.; Petereit, C.; Støttrup, J.G. & Peck, M.A.(2021). On the edge of death: Rates of decline and lower thresholds of biochemical condition in food-deprived fish larvae and juveniles. Journal of Marine Systems, 93, 11-24 doi:10.1016/j.jmarsys.2011.09.010pt_PT
dc.identifier.doi10.1016/j.jmarsys.2011.09.010pt_PT
dc.identifier.issn09247963
dc.identifier.urihttp://hdl.handle.net/10400.12/8151
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectRNA–DNA ratiopt_PT
dc.subjectStarvation ratept_PT
dc.subjectMortality thresholdpt_PT
dc.subjectTime to deathpt_PT
dc.subjectPercentile approachpt_PT
dc.titleOn the edge of death: Rates of decline and lower thresholds of biochemical condition in food-deprived fish larvae and juvenilespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceNetherlandspt_PT
oaire.citation.endPage24pt_PT
oaire.citation.startPage11pt_PT
oaire.citation.titleJournal of Marine Systemspt_PT
oaire.citation.volume93pt_PT
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT

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