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Assessing the impact of environmental forcing on the condition of anchovy larvae in the Cadiz Gulf using nucleic acid and fatty acid-derived indices

2017-02Journal article Restricted access
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dc.contributor.authorTeodosio, Maria
dc.contributor.authorGarrido, Susana
dc.contributor.authorPeters, J.
dc.contributor.authorMiguel de Sousa Leitão, Francisco
dc.contributor.authorRe, P.
dc.contributor.authorPeliz, A.
dc.contributor.authorSantos, A.M.P.
dc.date.accessioned2019-11-20T15:07:48Z
dc.date.available2019-11-20T15:07:48Z
dc.date.issued2017-02
dc.description.abstractUnderstanding the environmental processes affecting fish larvae survival is critical for population dynamics,"conservation purposes and to ecosystem-based fishery management. Using anchovies (Engraulis encrasicolus) of the Cadiz Gulf as a study case and considering the "Ocean Triad" hypothesis, we investigate the larval ecophysiological status and potential survival in relation to oceanographic variables. Therefore, this study aims to describe the nutritional condition of anchovy larvae during spawning season (peak in summer) through nucleic acid- and fatty acid (FA)-derived indices and to analyze the effects of the major environmental parameters (Depth, Temperature, Salinity, Plankton biomass) on anchovy survival potential at early phases. Fish larvae were collected in August from 30 m to 400 m depth at 35 stations off the southern Iberian coast. A previous upwelling event influenced the oceanographic conditions of the more western stations off Cape Sao Vicente (CSV). Along the coast, the water became warmer from west to the east through Cape Santa Maria (CSM) ending at Guadiana estuary, where easterly winds originated the development of a counter current. The standardized RNA/ DNA (sRD) of anchovy larvae decreased throughout larval ontogeny, reflecting a reduction of growth during the development. Essential FA concentrations also decreased, but docosahexaenoic acid (DHA) in particular was highly conserved even after the reduction of total FA concentration in anchovy larvae related to the onset of swimming abilities (post-flexion phase). The oceanographic conditions (west upwelling, east counter current, and stratification) led to a nearshore aggregation of plankton and anchovy larvae with good ecophysiological conditions in the central area of the southern coast, where an optimal range of temperature and chlorophyll, as an indirect food proxy for anchovy larval development, were registered. The study proves that the oceanographic conditions of the study area are putative drivers of the ecophysiological condition of anchovy larvae to guarantee potential survival, supporting the "Ocean Triad" hypothesis with major repercussions for recruitment and population dynamics.
dc.description.sponsorshipEuropean Commission [ERAC_CT-2004-515871]
dc.description.sponsorshipPortuguese Science and Technology Foundation [FCT PTDC/MAR/098643/2008, PTDC/MAR/111304/2009, PTDC/AAC-CLI/114512/2009, UID/Multi/04326/2013]
dc.description.sponsorshipEuropean Regional Development Fund (COMPETE program- Operational Competitiveness Programme)
dc.description.sponsorshipFTC [UID/Multi/04326/2013, SFRH/BPD/38332/2007, SFRH/BPD/105419/2014]
dc.description.sponsorship[SFRH/BSAB/113684/2015]
dc.identifier.doi10.1016/j.ecss.2016.10.023
dc.identifier.issn0272-7714
dc.identifier.urihttp://hdl.handle.net/10400.1/13224
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationVital rates of pelagic fish larvae (VITAL)
dc.relationTAXAS VITAIS DE LARVAS DE PEIXES NECESSÁRIAS À MODELAÇÃO DA DINÂMICA LARVAR NO ECOSSISTEMA DE AFLORAMENTO COSTEIRO IBÉRICO
dc.subjectSmall pelagic fish
dc.subjectEngraulis Encrasicolus-L.
dc.subjectSardina Pilchardus larvae
dc.subjectEarly life stages
dc.subjectMediterranean Sea
dc.subjectRna/Dna ratios
dc.subjectNutritional condition
dc.subjectEuropean anchovy
dc.subjectVertical distribution
dc.subjectEstuarine nursery
dc.subjectFish larvae
dc.subjectConnectivity ocean-neashore
dc.subjectIchthyoplankton
dc.subjectRecruitment
dc.titleAssessing the impact of environmental forcing on the condition of anchovy larvae in the Cadiz Gulf using nucleic acid and fatty acid-derived indices
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleVital rates of pelagic fish larvae (VITAL)
oaire.awardTitleTAXAS VITAIS DE LARVAS DE PEIXES NECESSÁRIAS À MODELAÇÃO DA DINÂMICA LARVAR NO ECOSSISTEMA DE AFLORAMENTO COSTEIRO IBÉRICO
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F098643%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F111304%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAAC-CLI%2F114512%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F38332%2F2007/PT
oaire.citation.endPage106
oaire.citation.startPage94
oaire.citation.titleEstuarine Coastal and Shelf Science
oaire.citation.volume185
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
oaire.fundingStream5876
person.familyNameTeodosio
person.familyNameLeitão
person.familyNameSantos
person.givenNameMaria
person.givenNameFrancisco
person.givenNameA. Miguel P.
person.identifier620214
person.identifier290283
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.ciencia-id3E1C-DBC2-42D5
person.identifier.ciencia-id541E-93D0-BFC3
person.identifier.orcid0000-0002-0939-9885
person.identifier.orcid0000-0003-4983-9782
person.identifier.orcid0000-0001-9401-3504
person.identifier.ridB-5077-2013
person.identifier.ridM-3980-2013
person.identifier.ridG-6030-2011
person.identifier.scopus-author-id56196396700
person.identifier.scopus-author-id7003991946
person.identifier.scopus-author-id25926746100
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
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