Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal...

Autores
Masello, Juan F.; Pagnossin, María Luján; Sommer, Christina; Quillfeldt, Petra
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We here describe the largest colony of Burrowing Parrots (Cyanoliseus patagonus), located in Patagonia, Argentina. Counts during the 2001–02 breeding season showed that the colony extended along 9 km of a sandstone cliff facing the Altantic Ocean, in the province of Río Negro, Patagonia, Argentina, and contained 51412 burrows, an estimated 37527 of which were active. To our knowledge, this is largest known colony of Psittaciformes. Additionally, 6500 Parrots not attending nestlings were found to be associated with the colony during the 2003–04 breeding season. We monitored activities at nests and movements between nesting and feeding areas. Nestlings were fed 3–6 times daily. Adults travelled in flocks of up to 263 Parrots to the feeding grounds in early mornings; later in the day, they flew in smaller flocks, making 1–4 trips to the feeding grounds. Overall, the most frequent flock size was two, indicating that the pair is the basic social unit during the breeding season. The average flight-speed was 36.9 km h–1. Terrestrial and aerial surveys during the 2003–04 and 2004–05 breeding seasons suggest that Burrowing Parrots performed long daily movements in order to feed in the remaining patches of natural vegetation, travelling 58 and 66 km over the two main routes to the feeding areas. The colony is seriously threatened by human activity, and surrounding habitat is being rapidly transformed to agricultural land. Based on the data presented, we recommend monitoring the colony using detailed counts of numbers of nests, the documentation of the extent of the entire colony, together with data on breeding success, nestling growth and feeding rates. The number of non-breeders associated with the colony should be monitored, and as an additional index of abundance, counts from stationary locations should be continued.
Facultad de Ciencias Naturales y Museo
Materia
Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/127056

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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffsMasello, Juan F.Pagnossin, María LujánSommer, ChristinaQuillfeldt, PetraZoologíaFlockForagingPopulation sizeEcologyRange (biology)OrnithologySouthern hemispherePsittaciformesConservation biologyBiologyZoologyWe here describe the largest colony of Burrowing Parrots (Cyanoliseus patagonus), located in Patagonia, Argentina. Counts during the 2001–02 breeding season showed that the colony extended along 9 km of a sandstone cliff facing the Altantic Ocean, in the province of Río Negro, Patagonia, Argentina, and contained 51412 burrows, an estimated 37527 of which were active. To our knowledge, this is largest known colony of Psittaciformes. Additionally, 6500 Parrots not attending nestlings were found to be associated with the colony during the 2003–04 breeding season. We monitored activities at nests and movements between nesting and feeding areas. Nestlings were fed 3–6 times daily. Adults travelled in flocks of up to 263 Parrots to the feeding grounds in early mornings; later in the day, they flew in smaller flocks, making 1–4 trips to the feeding grounds. Overall, the most frequent flock size was two, indicating that the pair is the basic social unit during the breeding season. The average flight-speed was 36.9 km h–1. Terrestrial and aerial surveys during the 2003–04 and 2004–05 breeding seasons suggest that Burrowing Parrots performed long daily movements in order to feed in the remaining patches of natural vegetation, travelling 58 and 66 km over the two main routes to the feeding areas. The colony is seriously threatened by human activity, and surrounding habitat is being rapidly transformed to agricultural land. Based on the data presented, we recommend monitoring the colony using detailed counts of numbers of nests, the documentation of the extent of the entire colony, together with data on breeding success, nestling growth and feeding rates. The number of non-breeders associated with the colony should be monitored, and as an additional index of abundance, counts from stationary locations should be continued.Facultad de Ciencias Naturales y Museo2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf69-79http://sedici.unlp.edu.ar/handle/10915/127056enginfo:eu-repo/semantics/altIdentifier/issn/0158-4197info:eu-repo/semantics/altIdentifier/issn/1448-5540info:eu-repo/semantics/altIdentifier/doi/10.1071/mu04047info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:30:38Zoai:sedici.unlp.edu.ar:10915/127056Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:30:39.144SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
title Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
spellingShingle Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
Masello, Juan F.
Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
title_short Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
title_full Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
title_fullStr Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
title_full_unstemmed Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
title_sort Population size, provisioning frequency, flock size and foraging range at the largest known colony of Psittaciformes: the Burrowing Parrots of the north-eastern Patagonian coastal cliffs
dc.creator.none.fl_str_mv Masello, Juan F.
Pagnossin, María Luján
Sommer, Christina
Quillfeldt, Petra
author Masello, Juan F.
author_facet Masello, Juan F.
Pagnossin, María Luján
Sommer, Christina
Quillfeldt, Petra
author_role author
author2 Pagnossin, María Luján
Sommer, Christina
Quillfeldt, Petra
author2_role author
author
author
dc.subject.none.fl_str_mv Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
topic Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
dc.description.none.fl_txt_mv We here describe the largest colony of Burrowing Parrots (Cyanoliseus patagonus), located in Patagonia, Argentina. Counts during the 2001–02 breeding season showed that the colony extended along 9 km of a sandstone cliff facing the Altantic Ocean, in the province of Río Negro, Patagonia, Argentina, and contained 51412 burrows, an estimated 37527 of which were active. To our knowledge, this is largest known colony of Psittaciformes. Additionally, 6500 Parrots not attending nestlings were found to be associated with the colony during the 2003–04 breeding season. We monitored activities at nests and movements between nesting and feeding areas. Nestlings were fed 3–6 times daily. Adults travelled in flocks of up to 263 Parrots to the feeding grounds in early mornings; later in the day, they flew in smaller flocks, making 1–4 trips to the feeding grounds. Overall, the most frequent flock size was two, indicating that the pair is the basic social unit during the breeding season. The average flight-speed was 36.9 km h–1. Terrestrial and aerial surveys during the 2003–04 and 2004–05 breeding seasons suggest that Burrowing Parrots performed long daily movements in order to feed in the remaining patches of natural vegetation, travelling 58 and 66 km over the two main routes to the feeding areas. The colony is seriously threatened by human activity, and surrounding habitat is being rapidly transformed to agricultural land. Based on the data presented, we recommend monitoring the colony using detailed counts of numbers of nests, the documentation of the extent of the entire colony, together with data on breeding success, nestling growth and feeding rates. The number of non-breeders associated with the colony should be monitored, and as an additional index of abundance, counts from stationary locations should be continued.
Facultad de Ciencias Naturales y Museo
description We here describe the largest colony of Burrowing Parrots (Cyanoliseus patagonus), located in Patagonia, Argentina. Counts during the 2001–02 breeding season showed that the colony extended along 9 km of a sandstone cliff facing the Altantic Ocean, in the province of Río Negro, Patagonia, Argentina, and contained 51412 burrows, an estimated 37527 of which were active. To our knowledge, this is largest known colony of Psittaciformes. Additionally, 6500 Parrots not attending nestlings were found to be associated with the colony during the 2003–04 breeding season. We monitored activities at nests and movements between nesting and feeding areas. Nestlings were fed 3–6 times daily. Adults travelled in flocks of up to 263 Parrots to the feeding grounds in early mornings; later in the day, they flew in smaller flocks, making 1–4 trips to the feeding grounds. Overall, the most frequent flock size was two, indicating that the pair is the basic social unit during the breeding season. The average flight-speed was 36.9 km h–1. Terrestrial and aerial surveys during the 2003–04 and 2004–05 breeding seasons suggest that Burrowing Parrots performed long daily movements in order to feed in the remaining patches of natural vegetation, travelling 58 and 66 km over the two main routes to the feeding areas. The colony is seriously threatened by human activity, and surrounding habitat is being rapidly transformed to agricultural land. Based on the data presented, we recommend monitoring the colony using detailed counts of numbers of nests, the documentation of the extent of the entire colony, together with data on breeding success, nestling growth and feeding rates. The number of non-breeders associated with the colony should be monitored, and as an additional index of abundance, counts from stationary locations should be continued.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/127056
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language eng
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info:eu-repo/semantics/altIdentifier/issn/1448-5540
info:eu-repo/semantics/altIdentifier/doi/10.1071/mu04047
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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 openAccess
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
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
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institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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