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Hydrobiologia

, Volume 834, Issue 1, pp 103–117 | Cite as

Influence of hydrodynamic connectivity on the genetic structure and gene flow of the common pandora Pagellus erythrinus

  • Anna Rita Rossi
  • Paolo ColangeloEmail author
  • Léo Berline
  • Elisa Angiulli
  • Giandomenico Ardizzone
  • Chiheb Fassatoui
  • Luciana Sola
Primary Research Paper

Abstract

Many marine organisms have complex genetic patterns that cannot be easily resolved by data analysis on spatial distribution of variability usually applied in population genetic studies. We propose an analytical framework to evaluate the role of dispersal during early life stages that considers the actual hydrodynamic connectivity in the Mediterranean Sea, as a factor shaping the population structure of demersal fishes. To this purpose, and to test different scenarios of gene flow, genotypes of individuals of Pagellus erythrinus sampled at 12 sites in the central Mediterranean Sea were analyzed at ten microsatellite loci. The results show the lack of genetic structure in western Mediterranean basin and a pattern of gene flow that deviates from an isolation by distance model. The observed gene flow estimates appear to be scale-dependent. At local scale, it is likely the result of multifactorial components, whereas at a larger scale it is mainly driven by the sea currents, directly influencing dispersal of larvae between sites not reachable by adult movements. Our results stress the importance of a quantitative analysis of potential early life stage dispersal in any study focusing on the population structure of fishes with a long larval stage.

Keywords

Demersal Dispersal Marine fishes Microsatellite Sparidae Oceanic circulation 

Notes

Acknowledgements

We thank the MEDITS coordinators and all of our colleagues for their invaluable help with sample collection, specifically Maria Teresa Spedicato and Giuseppe Lembo, COISPA (Bari); Angelo Cau, Dept. of Life and Environmental Sciences, Cagliari University; Corrado Piccinetti, Dept. of Biological, Geological and Environmental Sciences, Bologna University; Angelo Tursi, Dept. of Biology, Bari University; Fabio Fiorentino, Coastal Marine Environment Institute, Mazara del Vallo; and Mohamed Salah Romdhane, INAT/Université de Carthage, Tunisia. Financial support for this work was provided by Sapienza University of Rome, Sapienza Projects 2014, Grant C26A143AL3.

Supplementary material

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Authors and Affiliations

  1. 1.Department of Biology and Biotechnology “C. Darwin”Sapienza University of RomeRomeItaly
  2. 2.Aix-Marseille Univ, Univ Toulon, CNRS, IRD, MIO UM 110, Mediterranean Institute of OceanographyMarseilleFrance
  3. 3.Department of Environmental BiologySapienza University of RomeRomeItaly
  4. 4.Ecosystems and Aquatic Resources Research Unit (UR13AGRO1), National Agronomy Institute of Tunisia (INAT)University of CarthageTunisTunisia
  5. 5.National Research Council, CNR-IRETRomeItaly

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