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Genetic structure of a vulnerable species, the freshwater blenny ([i]Salaria fluviatilis[/i])

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Genetic structure of a vulnerable species, the freshwater blenny ([i]Salaria fluviatilis[/i])

Auteurs : Martin Laporte ; Raphaël Leblois ; Aurélie Coulon [France] ; Francois Bonhomme [France] ; Pierre Magnan [Canada] ; Patrick Berrebi [France]

Source :

Conservation Genetics [ 1566-0621 ] ; 2015.

RBID : INRA:332205

Abstract

The freshwater blenny ([i]Salaria fluviatilis[/i]), 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.

Url:

http://prodinra.inra.fr/record/332205

DOI: 10.1007/s10592-014-0682-0

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="??">The freshwater blenny ([i]Salaria fluviatilis[/i]), 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.</div>
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Genetic structure of a vulnerable species, the freshwater blenny ([i]Salaria fluviatilis[/i])

Genetic structure of a vulnerable species, the freshwater blenny ([i]Salaria fluviatilis[/i])

Source :

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri