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Are sardine larvae caught off northern Portugal in winter starving? An approach examining nutritional conditions

2003Journal article Open access
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dc.contributor.authorChicharo, Maria Alexandra
dc.contributor.authorEsteves, E.
dc.contributor.authorSantos, A. Miguel P.
dc.contributor.authorSantos, Antonina dos
dc.contributor.authorPeliz, A.
dc.contributor.authorRe, P.
dc.date.accessioned2010-04-21T11:00:25Z
dc.date.available2010-04-21T11:00:25Z
dc.date.issued2003
dc.description.abstractRecently, winter upwelling events off western Iberia have become more frequent. This may affect the production and survival of sardines egss and larvae through increased offshore transport. By analysis of RNA: DNA ratios, we investigated the impact of winter upwelling events on the larval conditions of Sardina pilchardus larvaeas a function of oceanographic conditions and food availability. Larvae were collected on a research cruise off northern Portugal in February 2000. Environmental parameters such as wind, water temperature, salinity microzooplankton biomass and daily egg production of the calanoid copepod Calanus helgolandicus also measured. The mean RNA:DNA ratios wererelatively high, indicating that almost all larvae collected were good condition. This was in agreement with the high microzooplankton biomass and high daily egg production of the copepod C. helgolandicus recorded during the same period. No adverse effects of upwelling causing offshore transport of larvae into poor feeding areas could be demonstrated because of the presence of a stratified warm plume with consequent high food production.pt
dc.description.sponsorshipThis research was funded by the project ‘Assessing the Impact of Hydrodynamic Forcing on the Survival of Small Pelagic Fish Early Life Stages of Western Iberia (SURVIVAL)’ (FCT-PRAXIS/P/CTE/11282/1998). SURVIVAL is a project affiliated with GLOBEC. Thanks are due to Marcelo de Vasconcelos, the crew of the RV ‘Noruega’, the PELAGICOS programme (FCT-IPIMAR), and to all persons who provided data or participated in the cruises. We would like to thank Xavier Irigoien for providing assistance with the egg and copepod production techniques.pt
dc.identifier.citationMarine Ecology Progress Seriespt
dc.identifier.issn0171-8630
dc.identifier.otherAUT: MCH00377; EES01759;
dc.identifier.urihttp://hdl.handle.net/10400.1/201
dc.language.isoengpt
dc.publisherInter Researchpt
dc.relation.publisherversionhttp://www.int-res.com/articles/meps2003/257/m257p303.pdfpt
dc.subjectPeixept
dc.subjectSardinhapt
dc.subjectHidrobiologia da pescapt
dc.subjectRNApt
dc.subjectFish larvaept
dc.subjectDaily egg productionpt
dc.subjectRNA:DNA ratiospt
dc.subjectSardina pilcharduspt
dc.subjectMicrozooplankton biomasspt
dc.titleAre sardine larvae caught off northern Portugal in winter starving? An approach examining nutritional conditionspt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceGermanypt
oaire.citation.endPage309pt
oaire.citation.issueVol. 257 (2003)pt
oaire.citation.startPage303pt
oaire.citation.titleMarine Ecology Progress Seriespt
person.familyNameTeodosio
person.familyNameEsteves
person.familyNameSantos
person.givenNameMaria
person.givenNameEduardo
person.givenNameA. Miguel P.
person.identifier290283
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.ciencia-idC81D-666A-FF24
person.identifier.ciencia-id541E-93D0-BFC3
person.identifier.orcid0000-0002-0939-9885
person.identifier.orcid0000-0002-1872-8185
person.identifier.orcid0000-0001-9401-3504
person.identifier.ridB-5077-2013
person.identifier.ridE-9582-2012
person.identifier.ridG-6030-2011
person.identifier.scopus-author-id56196396700
person.identifier.scopus-author-id7003885183
person.identifier.scopus-author-id25926746100
rcaap.rightsopenAccesspt
rcaap.typearticlept
relation.isAuthorOfPublicationb39b2d6d-d6f5-4130-a9b9-4e7624d44676
relation.isAuthorOfPublicationaa7fd030-1bcb-4f16-83ad-508346a35f97
relation.isAuthorOfPublication847a80b0-7a6f-4b19-baea-4514c6908f65
relation.isAuthorOfPublication.latestForDiscoveryaa7fd030-1bcb-4f16-83ad-508346a35f97

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