Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina
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 c...
| Autores principales: | , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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2018
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/2191 http://www.bioone.org/doi/abs/10.1675/063.041.0103 https://doi.org/10.1675/063.041.0103 |
| _version_ | 1855483010418212864 |
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| author | Pedrana, Julieta Bernad, Lucía Bernardos, Jaime Nicolás Seco Pon, Juan Pablo Isacch, Juan Pablo Muñoz, Sebastián Darío Maceira, Nestor Oscar |
| author_browse | Bernad, Lucía Bernardos, Jaime Nicolás Isacch, Juan Pablo Maceira, Nestor Oscar Muñoz, Sebastián Darío Pedrana, Julieta Seco Pon, Juan Pablo |
| author_facet | Pedrana, Julieta Bernad, Lucía Bernardos, Jaime Nicolás Seco Pon, Juan Pablo Isacch, Juan Pablo Muñoz, Sebastián Darío Maceira, Nestor Oscar |
| author_sort | Pedrana, Julieta |
| collection | INTA Digital |
| description | 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 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. |
| format | Artículo |
| id | INTA2191 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA21912021-09-30T13:12:55Z Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina Pedrana, Julieta Bernad, Lucía Bernardos, Jaime Nicolás Seco Pon, Juan Pablo Isacch, Juan Pablo Muñoz, Sebastián Darío Maceira, Nestor Oscar Dinámica de Poblaciones Población Animal Aves Acuáticas Ganso Invierno Winter Geese Waterfowl Animal Population Population Dynamics 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 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. Fil: Pedrana, Julieta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Bernad, Lucía. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Bernardos, Jaime Nicolás Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: 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; Argentina Fil: 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; Argentina Fil: Muñoz, Sebastián Darío. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Maceira, Nestor Oscar. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina 2018-04-06T14:55:31Z 2018-04-06T14:55:31Z 2018-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/2191 http://www.bioone.org/doi/abs/10.1675/063.041.0103 1524-4695 1938-5390 (online version) https://doi.org/10.1675/063.041.0103 eng info:eu-repo/semantics/restrictedAccess application/pdf Waterbirds 41 (1) : 16- 21. (Mar. 2018) |
| spellingShingle | Dinámica de Poblaciones Población Animal Aves Acuáticas Ganso Invierno Winter Geese Waterfowl Animal Population Population Dynamics Pedrana, Julieta Bernad, Lucía Bernardos, Jaime Nicolás Seco Pon, Juan Pablo Isacch, Juan Pablo Muñoz, Sebastián Darío Maceira, Nestor Oscar Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina |
| title | Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina |
| title_full | Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina |
| title_fullStr | Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina |
| title_full_unstemmed | Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina |
| title_short | Winter population size estimations of three migratory sheldgeese in the southern pampas, Argentina |
| title_sort | winter population size estimations of three migratory sheldgeese in the southern pampas argentina |
| topic | Dinámica de Poblaciones Población Animal Aves Acuáticas Ganso Invierno Winter Geese Waterfowl Animal Population Population Dynamics |
| url | http://hdl.handle.net/20.500.12123/2191 http://www.bioone.org/doi/abs/10.1675/063.041.0103 https://doi.org/10.1675/063.041.0103 |
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