Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics

In this study we analyse factors affecting nest survival in Blue-fronted Parrots <i>Amazona aestiva</i> breeding in the Chaco region of northern Argentina. We combined temporal and environmental variables in order to determine which best explain variation in overall nest survival and in...

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Autores: Berkunsky, Igor, Segura, Luciano Noel, Aramburú, Rosana Mariel, Ruggera, Román Alberto, Svagelj, Walter Sergio, Reboreda, Juan Carlos
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/98092
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/98092
Access Level:acceso abierto
Palabra clave:Ciencias Naturales
Zoología
Amazona aestiva
Breeding
MARK
Nest survival
Parrot
Predation
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spelling Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristicsBerkunsky, IgorSegura, Luciano NoelAramburú, Rosana MarielRuggera, Román AlbertoSvagelj, Walter SergioReboreda, Juan CarlosCiencias NaturalesZoologíaAmazona aestivaBreedingMARKNest survivalParrotPredationIn this study we analyse factors affecting nest survival in Blue-fronted Parrots <i>Amazona aestiva</i> breeding in the Chaco region of northern Argentina. We combined temporal and environmental variables in order to determine which best explain variation in overall nest survival and in predation dependent nest survival. We predicted that high and deep cavities, that are inaccessible to snakes and other predators, would have high daily survival rates. We compared the relative effects on nest survival of time of the breeding season, stage of the nesting cycle, and characteristics of the nest cavity. We modelled daily survival rate (DSR) for all observed nests, and daily survival rate for nests that had been predated (daily survival rate in relation to predation exclusively, DSR<sub>p</sub>). Nest predation accounted for 50% of nest failures. DSR was on average 0.989, translating into an apparent hatching success of 0.39. DSR decreased with time of breeding and increased with nest age. DSR<sub>p</sub> decreased with time of breeding and inclination of the nest cavity entrance hole and increased with height from the ground of the entrance hole. There was a quadratic effect of nest age on DSR<sub>p</sub>, such that daily survival was highest during incubation, lowest at hatching and the early nestling stage, but increasing throughout the remainder of the nestling stage. This effect became more pronounced as the breeding season advanced. Year and observer effects did not affect the probability of survival. Temporal patterns and characteristics of the nest cavity explained most of the variation in nest survival in Blue-fronted Parrots, which highlights the relevance of including these covariates in future studies of nest survival in parrots, and has important management and conservation implications.Facultad de Ciencias Naturales y Museo2016-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf143-151http://sedici.unlp.edu.ar/handle/10915/98092enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/55222info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/10.5253/arde.v104i2.a6info:eu-repo/semantics/altIdentifier/issn/0373-2266info:eu-repo/semantics/altIdentifier/doi/10.5253/arde.v104i2.a6info:eu-repo/semantics/altIdentifier/hdl/11336/55222info: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:UNLP2024-05-08T12:58:06Zoai:sedici.unlp.edu.ar:10915/98092Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 12:58:06.909SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
title Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
spellingShingle Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
Berkunsky, Igor
Ciencias Naturales
Zoología
Amazona aestiva
Breeding
MARK
Nest survival
Parrot
Predation
title_short Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
title_full Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
title_fullStr Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
title_full_unstemmed Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
title_sort Nest survival and predation in Blue-fronted Parrots <i>Amazona aestiva</i>: effects of nesting behaviour and cavity characteristics
dc.creator.none.fl_str_mv Berkunsky, Igor
Segura, Luciano Noel
Aramburú, Rosana Mariel
Ruggera, Román Alberto
Svagelj, Walter Sergio
Reboreda, Juan Carlos
author Berkunsky, Igor
author_facet Berkunsky, Igor
Segura, Luciano Noel
Aramburú, Rosana Mariel
Ruggera, Román Alberto
Svagelj, Walter Sergio
Reboreda, Juan Carlos
author_role author
author2 Segura, Luciano Noel
Aramburú, Rosana Mariel
Ruggera, Román Alberto
Svagelj, Walter Sergio
Reboreda, Juan Carlos
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Zoología
Amazona aestiva
Breeding
MARK
Nest survival
Parrot
Predation
topic Ciencias Naturales
Zoología
Amazona aestiva
Breeding
MARK
Nest survival
Parrot
Predation
description In this study we analyse factors affecting nest survival in Blue-fronted Parrots <i>Amazona aestiva</i> breeding in the Chaco region of northern Argentina. We combined temporal and environmental variables in order to determine which best explain variation in overall nest survival and in predation dependent nest survival. We predicted that high and deep cavities, that are inaccessible to snakes and other predators, would have high daily survival rates. We compared the relative effects on nest survival of time of the breeding season, stage of the nesting cycle, and characteristics of the nest cavity. We modelled daily survival rate (DSR) for all observed nests, and daily survival rate for nests that had been predated (daily survival rate in relation to predation exclusively, DSR<sub>p</sub>). Nest predation accounted for 50% of nest failures. DSR was on average 0.989, translating into an apparent hatching success of 0.39. DSR decreased with time of breeding and increased with nest age. DSR<sub>p</sub> decreased with time of breeding and inclination of the nest cavity entrance hole and increased with height from the ground of the entrance hole. There was a quadratic effect of nest age on DSR<sub>p</sub>, such that daily survival was highest during incubation, lowest at hatching and the early nestling stage, but increasing throughout the remainder of the nestling stage. This effect became more pronounced as the breeding season advanced. Year and observer effects did not affect the probability of survival. Temporal patterns and characteristics of the nest cavity explained most of the variation in nest survival in Blue-fronted Parrots, which highlights the relevance of including these covariates in future studies of nest survival in parrots, and has important management and conservation implications.
publishDate 2016
dc.date.none.fl_str_mv 2016-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/98092
url http://sedici.unlp.edu.ar/handle/10915/98092
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/55222
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/10.5253/arde.v104i2.a6
info:eu-repo/semantics/altIdentifier/issn/0373-2266
info:eu-repo/semantics/altIdentifier/doi/10.5253/arde.v104i2.a6
info:eu-repo/semantics/altIdentifier/hdl/11336/55222
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
143-151
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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