Temporal genetic variation as revealed by a microsatellite analysis of European sardine ( Sardina pilchardus) archived samples

Publication: Research - peer-reviewJournal article – Annual report year: 2012

  • Author: Ruggeri, Paolo

    Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Italy

  • Author: Splendiani, Andrea

    Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Italy

  • Author: Bonanomi, Sara

    Section for Population Ecology and Genetics, National Institute of Aquatic Resources, Technical University of Denmark, Vejlsøvej 39, 8600, Silkeborg, Denmark

  • Author: Arneri, Enrico

    FAO–FIMF, Fisheries and Aquaculture Department, Italy

  • Author: Cingolani, Nando

    Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine Sezione Pesca Marittima, Italy

  • Author: Santojanni, Alberto

    Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine Sezione Pesca Marittima, Italy

  • Author: Belardinelli, Andra

    Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine Sezione Pesca Marittima, Italy

  • Author: Giovannotti, Massimo

    Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Italy

  • Author: Caputo, Vincenzo

    Dipartimento di Scienze della Vita e dell’Ambiente, Università Politecnica delle Marche, Italy

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The Adriatic stock of European sardine ( Sardina pilchardus) has experienced large interannual demographic fluctuations over the last 30 years, with a severe decline beginning in 1991 and continuing until 1997. In the present study, six microsatellite loci were used on a time series collection of otoliths and scales from sampling locations of northern (Chioggia) and southern (Vieste) Adriatic Sea, with the aim to investigate the genetic effects of these stock biomass fluctuations. The northern samples showed significant reduction in observed heterozygosity ( HO) and mean number of alleles ( Na) that explain the genetic diversity variation, while the same parameters turned out to be more stable in the southern samples. In addition, we detected the presence of a genetic bottleneck and low effective population size ( Ne) values in several northern samples. Even if the northern and southern Adriatic sardine samples belong to the same genetic stock, the more pronounced decrease in genetic variability recorded in the northern sample led us to speculate that a more intensive fishing pressure and a more pronounced oceanographic isolation of this area could have accentuated the effects of the genetic bottleneck.
Original languageEnglish
JournalCanadian Journal of Fisheries and Aquatic Sciences
Publication date2012
Volume69
Issue10
Pages1698-1709
ISSN0706-652X
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 3

Keywords

  • EUROPEAN pilchard
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