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

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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,...

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Autores principales: Masello, Juan F., Pagnossin, María Luján, Sommer, Christina, Quillfeldt, Petra
Formato: Articulo
Lenguaje:Inglés
Publicado: 2006
Materias:
Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127056
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127056
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
spellingShingle Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
Masello, Juan F.
Pagnossin, María Luján
Sommer, Christina
Quillfeldt, Petra
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
topic_facet Zoología
Flock
Foraging
Population size
Ecology
Range (biology)
Ornithology
Southern hemisphere
Psittaciformes
Conservation biology
Biology
Zoology
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.
format Articulo
Articulo
author Masello, Juan F.
Pagnossin, María Luján
Sommer, Christina
Quillfeldt, Petra
author_facet Masello, Juan F.
Pagnossin, María Luján
Sommer, Christina
Quillfeldt, Petra
author_sort Masello, Juan F.
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
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
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/127056
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