Winter Population Size Estimations of Three Migratory Sheldgeese in the Southern Pampas, Argentina

Autores
Pedrana, Julieta; Bernad, Lucía; Bernardos, Jaime Nicolás; Seco Pon, Juan Pablo; Isacch, Juan Pablo; Muñoz, Sebastián Darío; Maceira, Nestor Oscar
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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
Fuente
Waterbirds 41 (1) : 16-21. (March 2018)
Materia
Migración
Ganso
Ecología
Densidad de la Población
Argentina
Migration
Geese
Ecology
Population Density
Chloephaga
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/19575
Acceder
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oai_identifier_str oai:localhost:20.500.12123/19575
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Winter Population Size Estimations of Three Migratory Sheldgeese in the Southern Pampas, ArgentinaPedrana, JulietaBernad, LucíaBernardos, Jaime NicolásSeco Pon, Juan PabloIsacch, Juan PabloMuñoz, Sebastián DaríoMaceira, Nestor OscarMigraciónGansoEcologíaDensidad de la PoblaciónArgentinaMigrationGeeseEcologyPopulation DensityChloephagaSheldgeese [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 BalcarceFil: Pedrana, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bernad, Lucía. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Bernardos, Jaime. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; ArgentinaFil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Nacional de Mar del Plata. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Isacch, Juan Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; ArgentinaFil: Muñoz, Sebastián Darío Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Maceira, Néstor. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaBioOne2024-09-27T10:59:36Z2024-09-27T10:59:36Z2018-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/19575https://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.short1524-4695https://doi.org/10.1675/063.041.0103Waterbirds 41 (1) : 16-21. (March 2018)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo: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/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:46:51Zoai:localhost:20.500.12123/19575instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:46:51.749INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv 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
spellingShingle Winter Population Size Estimations of Three Migratory Sheldgeese in the Southern Pampas, Argentina
Pedrana, Julieta
Migración
Ganso
Ecología
Densidad de la Población
Argentina
Migration
Geese
Ecology
Population Density
Chloephaga
title_short 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_sort Winter Population Size Estimations of Three Migratory Sheldgeese in the Southern Pampas, Argentina
dc.creator.none.fl_str_mv Pedrana, Julieta
Bernad, Lucía
Bernardos, Jaime Nicolás
Seco Pon, Juan Pablo
Isacch, Juan Pablo
Muñoz, Sebastián Darío
Maceira, Nestor Oscar
author Pedrana, Julieta
author_facet Pedrana, Julieta
Bernad, Lucía
Bernardos, Jaime Nicolás
Seco Pon, Juan Pablo
Isacch, Juan Pablo
Muñoz, Sebastián Darío
Maceira, Nestor Oscar
author_role author
author2 Bernad, Lucía
Bernardos, Jaime Nicolás
Seco Pon, Juan Pablo
Isacch, Juan Pablo
Muñoz, Sebastián Darío
Maceira, Nestor Oscar
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Migración
Ganso
Ecología
Densidad de la Población
Argentina
Migration
Geese
Ecology
Population Density
Chloephaga
topic Migración
Ganso
Ecología
Densidad de la Población
Argentina
Migration
Geese
Ecology
Population Density
Chloephaga
dc.description.none.fl_txt_mv 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
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.
publishDate 2018
dc.date.none.fl_str_mv 2018-03
2024-09-27T10:59:36Z
2024-09-27T10:59:36Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 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
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
identifier_str_mv 1524-4695
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 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.
dc.rights.none.fl_str_mv 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)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv BioOne
publisher.none.fl_str_mv BioOne
dc.source.none.fl_str_mv Waterbirds 41 (1) : 16-21. (March 2018)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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