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...
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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BioOne
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/19575 https://bioone.org/journals/waterbirds/volume-41/issue-1/063.041.0103/Winter-Population-Size-Estimations-of-Three-Migratory-Sheldgeese-in-the/10.1675/063.041.0103.short https://doi.org/10.1675/063.041.0103 |
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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 | info:ar-repo/semantics/artículo |
| id | INTA19575 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | BioOne |
| publisherStr | BioOne |
| record_format | dspace |
| spelling | INTA195752024-09-27T11:11:33Z 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 Migración Ganso Ecología Densidad de la Población Argentina Migration Geese Ecology Population Density Chloephaga 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. EEA Balcarce Fil: Pedrana, Julieta. 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. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Nacional de Mar del Plata. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Isacch, Juan Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Muñoz, Sebastián Darío Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Maceira, Néstor. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina 2024-09-27T10:59:36Z 2024-09-27T10:59:36Z 2018-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/19575 https://bioone.org/journals/waterbirds/volume-41/issue-1/063.041.0103/Winter-Population-Size-Estimations-of-Three-Migratory-Sheldgeese-in-the/10.1675/063.041.0103.short 1524-4695 https://doi.org/10.1675/063.041.0103 eng info:eu-repograntAgreement/INTA/PNNAT-1128053/AR./Evaluación y manejo de la biodiversidad y sus servicios ecosistémicos de interés para la producción agropecuaria. info:eu-repograntAgreement/INTA/PNNAT-1128052/AR./Desarrollo de herramientas y validación de metodologías para el estudio, gestión y manejo de los sistemas productivos, contribuyendo a su resiliencia socio agroambiental. info:eu-repograntAgreement/INTA/PNNAT/1128051/AR./Gestión de biodiversidad, servicios ecosistémicos, impactos y resiliencia socio agroambiental en sistemas productivos. info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf BioOne Waterbirds 41 (1) : 16-21. (March 2018) |
| spellingShingle | Migración Ganso Ecología Densidad de la Población Argentina Migration Geese Ecology Population Density Chloephaga 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 | Migración Ganso Ecología Densidad de la Población Argentina Migration Geese Ecology Population Density Chloephaga |
| url | http://hdl.handle.net/20.500.12123/19575 https://bioone.org/journals/waterbirds/volume-41/issue-1/063.041.0103/Winter-Population-Size-Estimations-of-Three-Migratory-Sheldgeese-in-the/10.1675/063.041.0103.short https://doi.org/10.1675/063.041.0103 |
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