Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/43554
Título: DNA barcoding and microsatellites help species delimitation and hybrid identification in endangered galaxiid fishes
Autores/as: Vanhaecke, Delphine
Garcia de Leaniz, Carlos
Gajardo, Gonzalo
Young, Kyle
Sanzana, Jose
Orellana, Gabriel
Fowler, Daniel
Howes, Paul
Monzon Argüello, Catalina 
Consuegra, Sofia
Clasificación UNESCO: 2401 Biología animal (zoología)
2409 Genética
Palabras clave: Endangered species
Microsatellite loci
Mitochondrial DNA
Fecha de publicación: 2012
Publicación seriada: PLoS ONE
Resumen: The conservation of data deficient species is often hampered by inaccurate species delimitation. The galaxiid fishes Aplochiton zebra and Aplochiton taeniatus are endemic to Patagonia (and for A. zebra the Falkland Islands), where they are threatened by invasive salmonids. Conservation of Aplochiton is complicated because species identification is hampered by the presence of resident as well as migratory ecotypes that may confound morphological discrimination. We used DNA barcoding (COI, cytochrome b) and a new developed set of microsatellite markers to investigate the relationships between A. zebra and A. taeniatus and to assess their distributions and relative abundances in Chilean Patagonia and the Falkland Islands. Results from both DNA markers were 100% congruent and revealed that phenotypic misidentification was widespread, size-dependent, and highly asymmetric. While all the genetically classified A. zebra were correctly identified as such, 74% of A. taeniatus were incorrectly identified as A. zebra, the former species being more widespread than previously thought. Our results reveal, for the first time, the presence in sympatry of both species, not only in Chilean Patagonia, but also in the Falkland Islands, where A. taeniatus had not been previously described. We also found evidence of asymmetric hybridisation between female A. taeniatus and male A. zebra in areas where invasive salmonids have become widespread. Given the potential consequences that species misidentification and hybridisation can have for the conservation of these endangered species, we advocate the use of molecular markers in order to reduce epistemic uncertainty.
URI: http://hdl.handle.net/10553/43554
DOI: 10.1371/journal.pone.0032939
Fuente: PLoS ONE, v. 7 (3) (e32939)
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