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The role of the south-western Alps as a unidirectional corridor for Mediterranean brown trout (Salmo trutta complex) lineages
- Source :
- Biological Journal of the Linnean Society, Biological Journal of the Linnean Society, Linnean Society of London, 2020, ⟨10.1093/biolinnean/blaa125⟩, Biological Journal of the Linnean Society, 2020, ⟨10.1093/biolinnean/blaa125⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- The role of the south-western Alps as a corridor for Mediterranean trout (Salmo trutta complex Linnaeus, 1758) was evaluated in order to understand the influence of the last glacial events in shaping the spatial distribution of the genetic diversity of this salmonid. For this, the allochthonous hypothesis of a man-mediated French origin (19th century) of the Mediterranean trout inhabiting the Po tributaries in the Italian side of the south-western Alps was tested. A total of 412 individuals were analysed at the mitochondrial control region. The phylogenetic classification was carried out by using a Median-Joining Network analysis. Mismatch pair-wise analysis, molecular dating and Kernel density distribution analysis of the main mitochondrial lineages were evaluated to compare past demographic dynamics with the current spatial distribution of genetic diversity. The main outcomes resulted strongly in agreement with a biogeographic scenario where the south-western Alps acted as a unidirectional corridor that permitted the colonization of the upper Durance (Rhône River basin) by trout from the Po River basin. Therefore, the Mediterranean trout should be considered as native also along the Italian side of the south-western Alps and the allochthonous hypothesis should be rejected.
- Subjects :
- 0106 biological sciences
Mediterranean climate
Conservation genetics
ice cover
Biology
Spatial distribution
010603 evolutionary biology
01 natural sciences
Brown trout
Tributary
[SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology
14. Life underwater
Salmo
Ecology, Evolution, Behavior and Systematics
mtDNA control region
geography
geography.geographical_feature_category
Ecology
010604 marine biology & hydrobiology
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE]
biology.organism_classification
biological corridors
Trout
conservation genetics
Salmo trutta complex
alpine barrier
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Subjects
Details
- Language :
- English
- ISSN :
- 00244066 and 10958312
- Database :
- OpenAIRE
- Journal :
- Biological Journal of the Linnean Society, Biological Journal of the Linnean Society, Linnean Society of London, 2020, ⟨10.1093/biolinnean/blaa125⟩, Biological Journal of the Linnean Society, 2020, ⟨10.1093/biolinnean/blaa125⟩
- Accession number :
- edsair.doi.dedup.....20abe1d2dbd284f6c65e941aba015f81