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Abstract:

Summary Sheldgeese of the genus Chloephaga are waterfowl (Anatidae) endemic to mainland South America and the Falkland Islands (Malvinas). Continental populations of three species C. picta, C. poliocephala, and C. rubidiceps breed in Patagonia and Tierra del Fuego and migrate northwards to winter in central Argentina and Chile. These continental populations have declined by > 50% in the past 30 years due to direct hunting to control crop damage and by the introduction of the grey fox Dusicyon griseus to their breeding grounds in Tierra del Fuego. The continental population of C. rubidiceps is critically endangered, estimated to be < 1,000 individuals. While no historic population size estimates exist for C. rubidiceps in its wintering grounds, the breeding population in Tierra del Fuego was estimated to number several thousand individuals in the 1950s. In contrast, the C. rubidiceps population in the Falkland Islands (Malvinas) is non-migratory and stable with > 42,000 individuals, as is the Falkland Islands (Malvinas) population of C. picta leucoptera with > 138,000 individuals. Here we use sequence data from the mitochondrial DNA control region to quantify genetic divergence between insular and continental populations of these two species of sheldgeese. Chloephaga rubidiceps and C. picta showed significant intraspecific differentiation of 1.0% and 0.6%, respectively. In both cases, mainland and insular populations were reciprocally monophyletic and did not share mtDNA haplotypes. These results suggest that the insular and continental populations of C. rubidiceps and C. picta are genetically distinct and that female-mediated gene flow is restricted. We recommend a reevaluation of the threat category status of the continental C. rubidiceps population, under IUCN guidelines. It is necessary to implement urgent actions for the conservation of this critically endangered population. © BirdLife International 2013.

Registro:

Documento: Artículo
Título:Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta
Autor:Bulgarella, M.; Kopuchian, C.; Giacomo, A.S.D.; Matus, R.; Blank, O.; Wilson, R.E.; McCracken, K.G.
Filiación:Ecology Group, Institute of Natural Resources, Massey University, Private Bag 11222, Palmerston North, New Zealand
División Ornitología, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Buenos Aires, Argentina
Laboratorio de Ecología y Comportamiento Animal, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
Centro de Rehabilitación Leñadura, Kilómetro 7 Sur, Punta Arenas, Chile
Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK 99775, United States
Palabras clave:bird; breeding population; breeding site; conservation status; endangered species; gene flow; hunting; intrasexual interaction; mitochondrial DNA; phylogeny; population decline; population migration; species conservation; waterfowl; Argentina; Chile; Falkland Islands (Malvinas); Patagonia; Tierra del Fuego [(PRV) Argentina]; Anser; Chloephaga picta; Chloephaga rubidiceps
Año:2014
Volumen:24
Número:1
Página de inicio:59
Página de fin:71
DOI: http://dx.doi.org/10.1017/S0959270913000178
Título revista:Bird Conservation International
Título revista abreviado:Bird Conserv. Int.
ISSN:09592709
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09592709_v24_n1_p59_Bulgarella

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Citas:

---------- APA ----------
Bulgarella, M., Kopuchian, C., Giacomo, A.S.D., Matus, R., Blank, O., Wilson, R.E. & McCracken, K.G. (2014) . Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta. Bird Conservation International, 24(1), 59-71.
http://dx.doi.org/10.1017/S0959270913000178
---------- CHICAGO ----------
Bulgarella, M., Kopuchian, C., Giacomo, A.S.D., Matus, R., Blank, O., Wilson, R.E., et al. "Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta" . Bird Conservation International 24, no. 1 (2014) : 59-71.
http://dx.doi.org/10.1017/S0959270913000178
---------- MLA ----------
Bulgarella, M., Kopuchian, C., Giacomo, A.S.D., Matus, R., Blank, O., Wilson, R.E., et al. "Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta" . Bird Conservation International, vol. 24, no. 1, 2014, pp. 59-71.
http://dx.doi.org/10.1017/S0959270913000178
---------- VANCOUVER ----------
Bulgarella, M., Kopuchian, C., Giacomo, A.S.D., Matus, R., Blank, O., Wilson, R.E., et al. Molecular phylogeny of the South American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta. Bird Conserv. Int. 2014;24(1):59-71.
http://dx.doi.org/10.1017/S0959270913000178