Evidence of fine-scale genetic structure for the endangered Pyrenean desman (Galemys pyrenaicus) in the French Pyrenees

Gillet François, Cabria Garrido M.T., Blanc Frédéric, Fournier-Chambrillon Christine, Némoz Mélanie, Sourp Eric, Vial-Novella C., Zardoya Rafael, Aulagnier Stéphane, Michaux Johan. 2017. Evidence of fine-scale genetic structure for the endangered Pyrenean desman (Galemys pyrenaicus) in the French Pyrenees. Journal of Mammalogy, 98 (2) : 523-532.

Quartile : Q1, Sujet : ZOOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : The Pyrenean desman (Galemys pyrenaicus) is a small, semiaquatic mammal endemic to the Pyrenean Mountains and the northern half of the Iberian Peninsula where it lives in cold and well-oxygenated flowing mountain streams. This species is currently classified as vulnerable on the IUCN Red List and has been undergoing habitat loss and fragmentation for decades, inevitably impacting its distribution. A recent genetic study, based on mitochondrial and intronic sequences, showed that the genetic variability of the Pyrenean desman is very low in the Pyrenees. In this study, we investigated the potential existence of genetic structure and gene flow at a smaller scale using 24 polymorphic microsatellite loci. As the Pyrenean desman is a very elusive species, we supplemented our tissue sample collection with samples of feces collected in the French range of this species. We successfully identified 70 individuals based on 355 fecal samples. Bayesian analyses revealed 3 genetic and geographic clusters (1 eastern, 1 central, and 1 western, including 3 genetic subclusters), with origins tracing back only 200 years. These clusters were characterized by low levels of genetic diversity and high inbreeding coefficients. Although gene flow among clusters appeared to be limited, populations seem to have exchanged alleles recently. Therefore, connectivity between watersheds should be enhanced to maintain genetic diversity and potentially improve the long-term survival of the Pyrenean desman in France.

Mots-clés géographiques Agrovoc : Pyrénées, France

Classification Agris : L20 - Écologie animale
P01 - Conservation de la nature et ressources foncières

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Agences de financement européennes : European Regional Development Fund

Auteurs et affiliations

• Gillet François, Université de Liège (BEL)
• Cabria Garrido M.T., Université de Liège (BEL)
• Blanc Frédéric, Conservatoire d'espaces naturels de Midi-Pyrénées (FRA)
• Fournier-Chambrillon Christine, GREGE (FRA)
• Némoz Mélanie, Conservatoire d'espaces naturels de Midi-Pyrénées (FRA)
• Sourp Eric, Parc national des Pyrénées (FRA)
• Vial-Novella C., Laboratoires des Pyrénées et des Landes (FRA)
• Zardoya Rafael, CSIC (ESP)
• Aulagnier Stéphane, INRA (FRA)
• Michaux Johan, CIRAD-ES-UPR AGIRs (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/584403/)

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