Genetic structure of a vulnerable species, the freshwater blenny (Salaria fluviatilis)

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• 作者：Martin Laporte ; Raphael Leblois ; Aurélie Coulon ; Fran?ois Bonhomme…
• 关键词：Evolutionarily significant unit ; Allele size permutation test ; Freshwater fish conservation ; Glacial refuge ; Endemic species ; Blenniidae
• 刊名：Conservation Genetics
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：16
• 期：3
• 页码：571-581
• 全文大小：1,933 KB
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• 作者单位：Martin Laporte (1) (6)
  Raphael Leblois (2)
  Aurélie Coulon (3) (4)
  Fran?ois Bonhomme (1)
  Pierre Magnan (5)
  Patrick Berrebi (1)
  
  1. Institut des Sciences de l’Evolution de Montpellier (ISEM), UMR 5554 UM2-CNRS-IRD, Université Montpellier II, CC065, Place E. Bataillon, 34095, Montpellier, Cedex 5, France
  6. Département de biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, G1V 0A6, Canada
  2. INRA-UMR1062 CBGP, Centre de Biologie pour la Gestion des populations, 34988, Montferrier-sur-Lez, France
  3. Muséum National d’Histoire Naturelle (MNHN), UMR 7204, 4 avenue du Petit Chateau, 91800, Brunoy, France
  4. Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, 1919 route de Mende, 34293, Montpellier 5, France
  5. Centre de recherche sur les interactions bassins versants—écosystèmes aquatiques (RIVE), Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC, G9A 5H7, Canada
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Human Genetics
  Animal Anatomy, Morphology and Histology
  Plant Sciences
  Evolutionary Biology
  
• 出版者：Springer Netherlands
• ISSN：1572-9737

文摘

The freshwater blenny (Salaria fluviatilis), an endemic fish to the tributaries of the Mediterranean and Black seas, is considered endangered in five of the nine Mediterranean-European countries. Substantial effort has recently been made to improve our understanding of its biology (i.e., habitat modelling, morphology, behaviour), but developing a conservation program for a species is less effective without a thorough knowledge of its genetic heterogeneity. The goal of this study was to assess the existence and boundaries of freshwater blenny genetic clusters in the occidental basin of the Mediterranean Sea. Our results suggest a genetic structure at two levels. The first is a range-wide product of two different glacial refuges, potentially the Iberian Peninsula (South of Spain; the origin of the “western-group) and Corsica (the “eastern-group). Subsequent northward migration likely took place along the Mediterranean coasts from these two glacial refuges to the southern part of mainland France, where a second contact zone potentially occurred. The second level is a fine-scale genetic structure corresponding to eight genetic groups—four to the west from the “western-refuge and four to the east from the “eastern-refuge. Furthermore, we demonstrate that population differentiation between the western and eastern groups had occurred far enough in the past that new mutations and not solely drift effects were detectable. These results provide a foundation on which to design future conservation efforts of the freshwater blenny in the occidental basin of the Mediterranean Sea.