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Abstract:

The Strange-tailed Tyrant Alectrurus risora (Aves: Tyrannidae) is an endemic species of southern South American grasslands that suffered a 90% reduction of its original distribution due to habitat transformation. This has led the species to be classified as globally Vulnerable. By the beginning of the last century, populations were partially migratory and moved south during the breeding season. Currently, the main breeding population inhabits the Iberá wetlands in the province of Corrientes, north-east Argentina, where it is resident all year round. There are two remaining small populations in the province of Formosa, north-east Argentina, and in southern Paraguay, which are separated from the main population by the Parana-Paraguay River and its continuous riverine forest habitat. The populations of Corrientes and Formosa are separated by 300 km and the grasslands between populations are non-continuous due to habitat transformation. We used mtDNA sequences and eight microsatellite loci to test if there were evidences of genetic isolation between Argentinean populations. We found no evidence of genetic structure between populations (ΦST = 0.004, P = 0.32; Fst = 0.01, P = 0.06), which can be explained by either retained ancestral polymorphism or by dispersal between populations. We found no evidence for a recent demographic bottleneck in nuclear loci. Our results indicate that these populations could be managed as a single conservation unit on a regional scale. Conservation actions should be focused on preserving the remaining network of areas with natural grasslands to guarantee reproduction, dispersal and prevent further decline of populations. © 2014 BirdLife International.

Registro:

Documento: Artículo
Título:No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
Autor:Di Giacomo, A.S.; Di Giacomo, A.G.; Kliger, R.; Reboreda, J.C.; Tiedemann, R.; Mahler, B.
Filiación:Departamento de Ecologiá, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, C1428EGA, Argentina
Departamento de Conservación, Aves Argentinas/Asociación Ornitológica Del Plata, Matheu 1246, Buenos Aires, C1249AAB, Argentina
Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany
Palabras clave:Alectrurus risora; Aves; Tyrannidae
Año:2015
Volumen:25
Número:2
Página de inicio:127
Página de fin:138
DOI: http://dx.doi.org/10.1017/S0959270914000203
Título revista:Bird Conservation International
Título revista abreviado:Bird Conserv. Int.
ISSN:09592709
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09592709_v25_n2_p127_DiGiacomo

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Citas:

---------- APA ----------
Di Giacomo, A.S., Di Giacomo, A.G., Kliger, R., Reboreda, J.C., Tiedemann, R. & Mahler, B. (2015) . No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species. Bird Conservation International, 25(2), 127-138.
http://dx.doi.org/10.1017/S0959270914000203
---------- CHICAGO ----------
Di Giacomo, A.S., Di Giacomo, A.G., Kliger, R., Reboreda, J.C., Tiedemann, R., Mahler, B. "No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species" . Bird Conservation International 25, no. 2 (2015) : 127-138.
http://dx.doi.org/10.1017/S0959270914000203
---------- MLA ----------
Di Giacomo, A.S., Di Giacomo, A.G., Kliger, R., Reboreda, J.C., Tiedemann, R., Mahler, B. "No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species" . Bird Conservation International, vol. 25, no. 2, 2015, pp. 127-138.
http://dx.doi.org/10.1017/S0959270914000203
---------- VANCOUVER ----------
Di Giacomo, A.S., Di Giacomo, A.G., Kliger, R., Reboreda, J.C., Tiedemann, R., Mahler, B. No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species. Bird Conserv. Int. 2015;25(2):127-138.
http://dx.doi.org/10.1017/S0959270914000203