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Insights into population structure of Diplodus vulgaris along the SW Portuguese coast from otolith elemental signatures

2011Journal article Restricted access
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dc.contributor.authorCorreia, A. T.
dc.contributor.authorPipa, T.
dc.contributor.authorGonçalves, J. M. S.
dc.contributor.authorErzini, Karim
dc.contributor.authorHamer, P. A.
dc.date.accessioned2016-12-14T16:22:26Z
dc.date.available2016-12-14T16:22:26Z
dc.date.issued2011
dc.description.abstractThe common two-banded sea bream (Diplodus vulgaris) is an important fish in the marine ecosystems of the NW Atlantic and Mediterranean. In southern Portugal it is a major fishery resource being targeted mainly by the artisanal fleets. Although there is some knowledge of the age, growth and reproductive biology of the species, information about its population structure is scarce and somewhat limited to the Mediterranean Sea. In this study the otolith elemental signatures of 90 specimens of D. vulgaris of the same age group (2+ years) and cohort collected from the important fishery regions of SW Portugal (Sesimbra, Sagres and Faro) have been analysed by inductively coupled plasma mass spectrometry (ICP-MS). Two different methodologies have been applied: solution based analysis of the whole otoliths; representative of the entire life-history prior to capture, and laser ablation analysis of otolith cores; representative of the larval and early post-settlement phase. Whole otolith comparisons utilised Sr/Ca, Ba/Ca, Mn/Ca, Li/Ca and Ni/Ca to demonstrate regional population structure. Classification accuracy rates from linear discriminant function analyses (LDFA) of whole otolith chemistry data were high for each region; Faro - 93%, Sagres - 90% and Sesimbra - 80%. Comparison of the otolith core chemistry utilised Sr/Ca, Ba/Ca, Mn/Ca and Mg/Ca and Zn/Ca. LDFA for the otolith core chemistry also achieved accurate classification for samples from Sesimbra (73%), but there was high overlap of otolith chemistry between samples from Faro and Sagres (47 and 43% classification accuracy respectively). The whole otolith results suggest that D. vulgaris are resident in the regional fishing areas during the juvenile phase. Both the core and whole otolith chemistry data supported separation of the Sesimbra fishery region from the more southern and closely associated Faro and Sagres regions for management purposes. However, while the whole otolith data indicated that the populations at Faro and Sagres likely remained separated in the juvenile stage, the otolith core chemistry data was inconclusive as to whether recruitment to these two areas was derived, or not, from different spawning areas.
dc.identifier.doihttp://dx.doi.org/10.1016/j.fishres.2011.06.014
dc.identifier.issn0165-7836
dc.identifier.otherAUT: JGO02808;
dc.identifier.urihttp://hdl.handle.net/10400.1/8803
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.isbasedonWOS:000295350700009
dc.subjectDiplodus vulgaris
dc.subjectPopulation structure
dc.subjectSW Portugal
dc.subjectOtolith signatures
dc.titleInsights into population structure of Diplodus vulgaris along the SW Portuguese coast from otolith elemental signatures
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage91
oaire.citation.issue111
oaire.citation.issue1-2
oaire.citation.startPage82
oaire.citation.titleFisheries Research
oaire.citation.volume111
person.familyNameGonçalves
person.familyNameErzini
person.givenNameJorge Manuel Santos
person.givenNameKarim
person.identifier356846
person.identifier.ciencia-id1013-ED6A-65EB
person.identifier.ciencia-idD917-7133-341A
person.identifier.orcid0000-0001-7704-8190
person.identifier.orcid0000-0002-1411-0126
person.identifier.ridG-5206-2011
person.identifier.ridM-5216-2013
person.identifier.scopus-author-id7103326116
person.identifier.scopus-author-id7004015948
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicationdd7829e9-e294-4297-8fb2-adf83c8623cf
relation.isAuthorOfPublicatione20f0e2d-3085-4c37-9e98-260dc9faddea
relation.isAuthorOfPublication.latestForDiscoverye20f0e2d-3085-4c37-9e98-260dc9faddea

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