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Population structure of Litopenaeus schmitti (Decapoda: Penaeidae) from the Brazilian coast identified using six polymorphic microsatellite loci

Authors

  • R. Maggioni,

    Corresponding author
    1. FECLESC & NUGEN, Universidade Estadual do Ceará, Av. Paranjana 1700, Fortaleza, CE 60740–000, Brazil;
    2. School of Biological Sciences, University of Southampton, Southampton, UK;
    3. School of Ocean & Earth Science, University of Southampton, Southampton, UK
      R Maggioni. Fax: + 55 85 2992503; E-mail: maggioni@uece.br.
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  • A. D. Rogers,

    1. School of Ocean & Earth Science, University of Southampton, Southampton, UK
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    • §

      Present address: British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK

  • N. Maclean

    1. School of Biological Sciences, University of Southampton, Southampton, UK;
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R Maggioni. Fax: + 55 85 2992503; E-mail: maggioni@uece.br.

Abstract

The population structure of the only Litopenaeus species occurring in Brazilian waters, the white shrimp L. schmitti, was surveyed by screening six microsatellite loci. High diversity (HE = 0.863; average number of alleles per locus = 37.8) was found across eight geographical locations (2°S to 27°S). Estimates of overall FST(0.0060) were low but significantly different from zero (P < 0.05). FST pairwise estimates and amova revealed a significant discontinuity around a major biogeographical boundary, near Cabo Frio, at 23°S. This separation may have been caused either by historical or on-going hydrogeographical and/or selective factors.

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