Recent expansion of Northeast Atlantic and Mediterranean populations of Melicertus (Penaeus) kerathurus (Crustacea: Decapoda).

Marco Arculeo, Francois Bonhomme

Risultato della ricerca: Article

12 Citazioni (Scopus)

Abstract

We analysed the genetic diversity of Melicertus kerathurus (Penaeidae), a commercially valuable penaeid shrimp that is distributed in the Mediterranean Sea and eastern Atlantic Ocean. We examined the polymorphism of a 494 bp DNA segment of the mitochondrial COI region in 173 individuals, sampled in nine Mediterranean and two Atlantic samples, covering the whole range of the species from the tropical waters of the Gulf of Guinea to the eastern part of the Mediterranean Sea. The mean nucleotide and haplotype diversities were pi = 0.00275 and h = 0.718, respectively, for the global data set, with the highest values occurring in the African samples and the lowest in the Adriatic Sea. A clear sample differentiation was found (F (st) = 0.194), but this did not reflect a geographical pattern and there were only faint traces of an Atlantic-Mediterranean subdivision. Mismatch analysis and a high significant negative value of Tajima's D suggested that M. kerathurus is not at mutation drift-equilibrium, but underwent a recent expansion after a period of low effective sample size. A postglacial recolonisation of the Mediterranean from an Atlantic refuge could be hypothesised based on these data.
Lingua originaleEnglish
pagine (da-a)1089-1095
Numero di pagine7
RivistaFisheries Science
Volume75
Stato di pubblicazionePublished - 2009

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All Science Journal Classification (ASJC) codes

  • Aquatic Science

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