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Extreme genetic differentiation among the remnant populations of marble trout (Salmo marmoratus) in Slovenia

  1. L. Fumagalli1,*,
  2. A. Snoj2,
  3. D. Jesenšek3,
  4. F. Balloux1,4,
  5. T. Jug2,
  6. O. Duron5,
  7. F. Brossier5,
  8. A. J. Crivelli6,
  9. P. Berrebi5

Article first published online: 9 OCT 2008

DOI: 10.1046/j.1365-294X.2002.01648.x

Issue

Molecular Ecology

Molecular Ecology

Volume 11, Issue 12, pages 2711–2716, December 2002

Additional Information

How to Cite

Fumagalli, L., Snoj, A., Jesenšek, D., Balloux, F., Jug, T., Duron, O., Brossier, F., Crivelli, A. J. and Berrebi, P. (2002), Extreme genetic differentiation among the remnant populations of marble trout (Salmo marmoratus) in Slovenia. Molecular Ecology, 11: 2711–2716. doi: 10.1046/j.1365-294X.2002.01648.x

Author Information

  1. 1

    Institut d’Ecologie, Laboratoire de Biologie de la Conservation, Bâtiment de Biologie, 1015 Lausanne, Switzerland;

  2. 2

    Department of Animal Science, University of Ljubljana, Domžale, Slovenia;

  3. 3

    Anglers’ Society of Tolmin, Most na Soči, Slovenia;

  4. 4

    I.C.A.P.B., University of Edinburgh, Edinburgh, UK;

  5. 5

    UMR 5119 ‘Ecosystèmes Lagunaires’, Université Montpellier II, Montpellier, France,

  6. 6

    Station Biologique de la Tour du Valat, Arles, France

* Luca Fumagalli. Fax: 41 21 692 4165; E-mail: Luca.Fumagalli@ie-zea.unil.ch

Publication History

  1. Issue published online: 9 OCT 2008
  2. Article first published online: 9 OCT 2008
  3. Received 21 May 2002; revision received 5 September 2002; accepted 5 September 2002

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Keywords:

  • conservation genetics;
  • hybridization;
  • introgression;
  • microsatellites;
  • population structure;
  • Salmo marmoratus

Abstract

Populations of the marble trout (Salmo marmoratus) have declined critically due to introgression by brown trout (Salmo trutta) strains. In order to define strategies for long-term conservation, we examined the genetic structure of the 8 known pure populations using 15 microsatellite loci. The analyses reveal extraordinarily strong genetic differentiation among populations separated by < 15 km, and extremely low levels of intrapopulation genetic variability. As natural recolonization seems highly unlikely, appropriate management and conservation strategies should comprise the reintroduction of pure populations from mixed stocks (translocation) to avoid further loss of genetic diversity.

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