Hydrobiologia

, Volume 664, Issue 1, pp 51–67

Phylogeography, genetic structure, and conservation of the endangered Caspian brown trout, Salmo trutta caspius (Kessler, 1877), from Iran

  • Manuel Vera
  • Iman Sourinejad
  • Carmen Bouza
  • Román Vilas
  • Ania Pino-Querido
  • Mohammad R. Kalbassi
  • Paulino Martínez
Primary research paper

Abstract

The Caspian Sea, the largest inland closed water body in the world, has numerous endemic species. The Caspian brown trout (Salmo trutta caspius) is considered as endangered according to IUCN criteria. Information on phylogeography and genetic structure is crucial for appropriate management of genetic resources. In spite of the huge number of studies carried out in the Salmo trutta species complex across its distribution range, very few data are available on these issues for S. trutta within the Caspian Sea. Mitochondrial (mtDNA control region) and nuclear (major ribosomal DNA internal transcribed spacer 1, ITS-1, and ten microsatellite loci) molecular markers were used to study the phylogeography, genetic structure, and current captive breeding strategies for reinforcement of Caspian trout in North Iranian rivers. Our results confirmed the presence of Salmo trutta caspius in this region. Phylogenetic analysis demonstrated its membership to the brown trout Danubian (DA) lineage. Genetic diversity of Caspian brown trout in Iranian Rivers is comparable to the levels usually observed in sustainable anadromous European brown trout populations. Microsatellite data suggested two main clusters connected by gene flow among river basins likely by anadromous fish. No genetic differences were detected between the hatchery sample and the remaining wild populations. While the current hatchery program has not produced detectable genetic changes in the wild populations, conservation strategies prioritizing habitat improvement and recovering natural spawning areas for enhancing wild populations are emphasized.

Keywords

Salmo trutta caspius Genetic population structure Phylogeography Conservation Caspian Sea 

Supplementary material

10750_2010_581_MOESM1_ESM.eps (1.4 mb)
Figure S1. Neighbor-Joining tree among the haplotypes found in Iranian Rivers. The numbers indicate the robustness of the branches using Neighbor-Joining (NJ above branch, bootstrap value >50) and Bayesian inference (BI, below branch, Posterior probability >50) (EPS 1.4 MB)

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Manuel Vera
    • 1
  • Iman Sourinejad
    • 1
    • 2
  • Carmen Bouza
    • 1
  • Román Vilas
    • 1
  • Ania Pino-Querido
    • 1
  • Mohammad R. Kalbassi
    • 3
    • 4
  • Paulino Martínez
    • 1
  1. 1.Departamento de Genética. Facultad de VeterinariaUniversidad de Santiago de CompostelaLugoSpain
  2. 2.Department of Fisheries Science, Faculty of Agriculture and Natural ResourcesUniversity of HormozganBandar AbbasIran
  3. 3.Department of Fisheries, Faculty of Marine SciencesTarbiat Modares UniversityNoorIran
  4. 4.Research and Development Center for Biotechnology (RDCB)Tarbiat Modares UniversityTehranIran

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