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Abstract:

Aim The blue-fronted amazon (Amazona aestiva ) is a widely distributed Neotropical parrot with two recognized sub-species, which are mainly characterized by the colour of the shoulder. We explored mitochondrial DNA variability to determine how demographic processes and historical climatic fluctuations may have contributed to phylogeographical pattern and morphological variation of A. aestiva, and how this information could be useful to understand the evolutionary relationship of this species and the Amazona ochrocephala complex and to determine management units for conservation purposes. Location Brazil and north-eastern Argentina. Methods We analysed a fragment of COI gene of 78 A. aestiva and 27 A. ochrocephala. We computed a median-joining network, and the population structure of A. aestiva populations was assessed using a hierarchical analysis of nucleotide diversity. The mismatch distribution, Fu's Fastr-test of neutrality and R2 test were used to detect past population expansion. Results All A. aestiva haplotypes and A. ochrocephala subspecies from north-eastern and southern South America were recovered within the South American clade. Hierarchical analysis of nucleotide diversity of A. aestiva populations detected two geographical groups as obtained by median-joining network. These two A. aestiva groups showed evidence of a recent population expansion. The time of populations splitting estimated corresponding to the Middle Pleistocene. Main conclusions The two A. aestiva genetic groups identified in our analyses agree with the morphological variation, corresponding to named subspecies. These two A. aestiva groups have undergone a recent population expansion, with low gene flow between them. The expansion of savannah areas may have contributed to the population expansion of these two groups. We concluded that introgression after isolated diversification may better explain haplotype sharing between A. aestiva and A. ochrocephala subspecies. We suggest that management and conservation strategies should consider these two A. aestiva groups (or subspecies) as different management units and should maintain viable populations of these two management units. © 2008 Blackwell Publishing Ltd.

Registro:

Documento: Artículo
Título:The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
Autor:Caparroz, R.; Seixas, G.H.F.; Berkunsky, I.; Collevatti, R.G.
Filiación:Pós-graduaĉao em Ciẽncias Genõmicas e Biotecnologia, Universidade Catòlica de Bras̀ilia, Campus II SGAN 916 Norte, Av. W5, 70790-160, Brasília, DF, Brazil
ProjetoPapagaio-verdadeiro, Fundaçao Neotrópica Do Brazil, Bonito, Mato Grosso do Sul, Brazil
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Amazona aestiva; Amazona ochrocephala; Conservation; MtDNA; Phylogeography; Pleistocene; bird; climate effect; conservation management; demography; evolutionary biology; gene flow; geographical distribution; introgression; mitochondrial DNA; morphology; phylogeography; Pleistocene; population structure; savanna; species conservation; subspecies; Argentina; Brazil; South America; Amazona aestiva; Amazona ochrocephala; Aves; Psittacidae; Psittaciformes
Año:2009
Volumen:15
Número:3
Página de inicio:459
Página de fin:468
DOI: http://dx.doi.org/10.1111/j.1472-4642.2009.00558.x
Título revista:Diversity and Distributions
Título revista abreviado:Diversity Distrib.
ISSN:13669516
CODEN:DIDIF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13669516_v15_n3_p459_Caparroz

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Citas:

---------- APA ----------
Caparroz, R., Seixas, G.H.F., Berkunsky, I. & Collevatti, R.G. (2009) . The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation. Diversity and Distributions, 15(3), 459-468.
http://dx.doi.org/10.1111/j.1472-4642.2009.00558.x
---------- CHICAGO ----------
Caparroz, R., Seixas, G.H.F., Berkunsky, I., Collevatti, R.G. "The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation" . Diversity and Distributions 15, no. 3 (2009) : 459-468.
http://dx.doi.org/10.1111/j.1472-4642.2009.00558.x
---------- MLA ----------
Caparroz, R., Seixas, G.H.F., Berkunsky, I., Collevatti, R.G. "The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation" . Diversity and Distributions, vol. 15, no. 3, 2009, pp. 459-468.
http://dx.doi.org/10.1111/j.1472-4642.2009.00558.x
---------- VANCOUVER ----------
Caparroz, R., Seixas, G.H.F., Berkunsky, I., Collevatti, R.G. The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation. Diversity Distrib. 2009;15(3):459-468.
http://dx.doi.org/10.1111/j.1472-4642.2009.00558.x