Population structure, genetic diversity and demographic patterns unveil massive Mediterranean brown trout manipulations in a protected area of the northern Apennines (Italy)
Rattachement africain : it. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
The Salmo trutta species complex includes threatened or intensively managed taxa. Domestic-Atlantic strains are widely farmed and massively introduced into the wild to support fisheries, although such practices seriously threaten native populations of Mediterranean brown trout through anthropogenic hybridization. Characterizing the distribution and genetic composition of wild populations across river catchments is crucial to identify conservation priorities and define appropriate management strategies. Here, we genotyped 586 brown trout at the diagnostic nuclear LDH-C1 gene and the mitochondrial D-loop fragment, to assess the conservation status of 33 sites in a protected area spanning river catchments from both the Adriatic and Tyrrhenian slopes in the northern Apennines (Italy). The results indicated a critical situation of widespread domestic-Atlantic introgression. Further analyses at 15 microsatellite loci on 159 individuals from 12 natural sites (along with 113 references from hatcheries) revealed similarity to hatchery stocks, higher genetic diversity and bottleneck signals in introgressed/exotic populations, consistently with relatively recent introductions of domestic-Atlantic individuals into wild sites. Conversely, the only native sites from a single river catchment on the Adriatic slope showed genetic distinctiveness, reduced diversity and demographic stability. We also found genetic evidence of a human-mediated introduction of allochthonous Mediterranean trout in a single wild site, as well as of a putative between-slopes translocation. We provide further insight into the occurrence and consequences of human manipulations on wild Mediterranean brown trout populations, contextually offering a reliable baseline for an ongoing conservation project aiming at preserving native populations of this endangered taxon.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Population structure, genetic diversity and demographic patterns unveil massive Mediterranean brown trout manipulations in a protected area of the northern Apennines (Italy)
- Date Crossref
- 19/06/2023
- Éditeur
- Informa UK Limited
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Istituto Superiore per la Protezione e la Ricerca Ambientale pays non établi dans la noticeOrganisme public
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University of Perugia Department of Chemistry pays non établi dans la noticeUniversité ou école supérieure
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Nature and Terrestrial Ecosystem Services - Italian Institute for Environmental Protection and Research (ISPRA) and Landscape Conservation pays non établi dans la noticeStructure de recherche
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Unit for Conservation Genetics - Italian Institute for Environmental Protection and Research (ISPRA) pays non établi dans la noticeStructure de recherche
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Unit for Nature Promotion pays non établi dans la noticeInstitution
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D.R.E.Am. Italia Soc. Coop. Agr pays non établi dans la noticeInstitution
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Ecology Museum of Meldola pays non établi dans la noticeInstitution
Istituto Superiore per la Protezione e la Ricerca Ambientale, Department of Chemistry — University of Perugia et and Landscape Conservation — Nature and Terrestrial Ecosystem Services - Italian Institute for Environmental Protection and Research (ISPRA), avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.