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Abstract
Sheldgeese [Upland Goose (Chloephaga picta picta), Ashy-headed Goose (C. poliocephala) and Ruddyheaded Goose (C. rubidiceps)] have similar migratory patterns, breeding in Patagonia (Argentina and Chile) and wintering mainly in the southern Pampas, Argentina. All of them are species of conservation concern in Argentina. The objective of this study was to estimate species densities using distance sampling and to calculate population sizes over three [ver mas...]
dc.contributor.authorPedrana, Julieta
dc.contributor.authorBernad, Lucí­a
dc.contributor.authorBernardos, Jaime Nicolás
dc.contributor.authorSeco Pon, Juan Pablo
dc.contributor.authorIsacch, Juan Pablo
dc.contributor.authorMuñoz, Sebastián Darí­o
dc.contributor.authorMaceira, Nestor Oscar
dc.date.accessioned2018-04-06T14:55:31Z
dc.date.available2018-04-06T14:55:31Z
dc.date.issued2018-03
dc.identifier.issn1524-4695
dc.identifier.issn1938-5390 (online version)
dc.identifier.otherhttps://doi.org/10.1675/063.041.0103
dc.identifier.urihttp://hdl.handle.net/20.500.12123/2191
dc.identifier.urihttp://www.bioone.org/doi/abs/10.1675/063.041.0103
dc.description.abstractSheldgeese [Upland Goose (Chloephaga picta picta), Ashy-headed Goose (C. poliocephala) and Ruddyheaded Goose (C. rubidiceps)] have similar migratory patterns, breeding in Patagonia (Argentina and Chile) and wintering mainly in the southern Pampas, Argentina. All of them are species of conservation concern in Argentina. The objective of this study was to estimate species densities using distance sampling and to calculate population sizes over three categories of habitat quality in the southeast of Buenos Aires Province, Argentina. Road surveys (9,200 km) were performed from a vehicle during two consecutive wintering seasons (13 June to 6 July 2011 and 9 June to 4 July 2012). Predicted probabilities of sheldgeese occurrence were divided into three classes of habitat quality. Upland Goose mean density was estimated at 3.72 individuals/km2, Ashy-headed Goose at 1.62 individuals/km2 and Ruddy-headed Goose at 0.04 individuals/km2. Consequently, Upland Goose numbers were estimated at 348,255 individuals, Ashy-headed Goose at 151,803 individuals and Ruddy-headed Goose at 498 individuals in the southeast of Buenos Aires Province. The results confirm former studies regarding the small population sizes of these species in comparison with historic data and suggest a decline in sheldgeese populations.eng
dc.formatapplication/pdfeng
dc.language.isoeng
dc.rightsinfo:eu-repo/semantics/restrictedAccesseng
dc.sourceWaterbirds 41 (1) : 16- 21. (Mar. 2018)eng
dc.subjectDinámica de Poblacioneses_AR
dc.subjectPoblación Animales_AR
dc.subjectAves Acuáticases_AR
dc.subjectGansoes_AR
dc.subjectInviernoes_AR
dc.subjectWintereng
dc.subjectGeeseeng
dc.subjectWaterfowleng
dc.subjectAnimal Populationeng
dc.subjectPopulation Dynamicseng
dc.titleWinter population size estimations of three migratory sheldgeese in the southern pampas, Argentinaeng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.filFil: Pedrana, Julieta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentinaes_AR
dc.description.filFil: Bernad, Lucí­a. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentinaes_AR
dc.description.filFil: Bernardos, Jaime Nicolás Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentinaes_AR
dc.description.filFil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentinaes_AR
dc.description.filFil: Isacch, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentinaes_AR
dc.description.filFil: Muñoz, Sebastián Darí­o. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentinaes_AR
dc.description.filFil: Maceira, Nestor Oscar. Estación Experimental Agropecuaria Balcarce; Argentinaes_AR
dc.subtypecientifico


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