How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi

Autores
Millones, Ana; Frere, Esteban
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
For seabirds, nest site features are an important factor that determines reproductive success. During three breeding seasons (2010-2012), we visited two coastal cliff colonies of Red-legged Cormorants halacrocorax gaimardi in the Ría Deseado, Argentina, and studied how nest site characteristics influenced their breeding success. We measured six physical characteristics at 46 nest sites, and we counted the number of fledglings produced each year from each nest (breeding success). We also related nest site temperature and wind exposure with nest site orientation. Breeding success was higher at nest sites with a broad base (greater capacity for holding young) and at nests that were less exposed to winds greater than 25 knots (46.25 km/h), which were sites with a north orientation. The lowest breeding success was observed in nest sites that were exposed to the strongest winds (i.e., sites with a south orientation). Strong winds often blow eggs and chicks away from the nests and increase opportunistic predation by gulls Larus sp. No significant relationship was found between nest site orientation and nest site temperature. Breeding success decreased with the distance to the nearest nest, which agrees with the idea that higher density of reproductive individuals reduces effectiveness of predators. Nest cover, distance from the top of the cliff, and distance from the tide line had no effect on breeding success at this study scale. Our results suggested that nest site haracteristics that were related to protection against adverse weather conditions (e.g., strong winds) and avian predation, in combination with a suitable nest space, determined the breeding success of Red-legged Cormorants.
Fil: Millones, Ana. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; Argentina
Fil: Frere, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; Argentina
Materia
ARGENTINA
MICROCLIMATE CONDITIONS
NEST SITE FEATURES
NEST SUCCESS
PRODUCTIVITY
RED-LEGGED CORMORANTS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/100448

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spelling How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardiMillones, AnaFrere, EstebanARGENTINAMICROCLIMATE CONDITIONSNEST SITE FEATURESNEST SUCCESSPRODUCTIVITYRED-LEGGED CORMORANTShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1For seabirds, nest site features are an important factor that determines reproductive success. During three breeding seasons (2010-2012), we visited two coastal cliff colonies of Red-legged Cormorants halacrocorax gaimardi in the Ría Deseado, Argentina, and studied how nest site characteristics influenced their breeding success. We measured six physical characteristics at 46 nest sites, and we counted the number of fledglings produced each year from each nest (breeding success). We also related nest site temperature and wind exposure with nest site orientation. Breeding success was higher at nest sites with a broad base (greater capacity for holding young) and at nests that were less exposed to winds greater than 25 knots (46.25 km/h), which were sites with a north orientation. The lowest breeding success was observed in nest sites that were exposed to the strongest winds (i.e., sites with a south orientation). Strong winds often blow eggs and chicks away from the nests and increase opportunistic predation by gulls Larus sp. No significant relationship was found between nest site orientation and nest site temperature. Breeding success decreased with the distance to the nearest nest, which agrees with the idea that higher density of reproductive individuals reduces effectiveness of predators. Nest cover, distance from the top of the cliff, and distance from the tide line had no effect on breeding success at this study scale. Our results suggested that nest site haracteristics that were related to protection against adverse weather conditions (e.g., strong winds) and avian predation, in combination with a suitable nest space, determined the breeding success of Red-legged Cormorants.Fil: Millones, Ana. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; ArgentinaFil: Frere, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; ArgentinaPolish Academy of Sciences. Museum and Institute of Zoology2018-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/100448Millones, Ana; Frere, Esteban; How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi; Polish Academy of Sciences. Museum and Institute of Zoology; Acta Ornithologica; 52; 2; 1-2018; 239-2440001-6454CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/Acta-Ornithologica/volume-52/issue-2/00016454AO2017.52.2.011/How-Nest-Site-Characteristics-Influence-Breeding-Success-in-Red-legged/10.3161/00016454AO2017.52.2.011.shortinfo:eu-repo/semantics/altIdentifier/doi/10.3161/00016454AO2017.52.2.011info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:04:56Zoai:ri.conicet.gov.ar:11336/100448instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:04:57.064CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
title How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
spellingShingle How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
Millones, Ana
ARGENTINA
MICROCLIMATE CONDITIONS
NEST SITE FEATURES
NEST SUCCESS
PRODUCTIVITY
RED-LEGGED CORMORANTS
title_short How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
title_full How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
title_fullStr How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
title_full_unstemmed How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
title_sort How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi
dc.creator.none.fl_str_mv Millones, Ana
Frere, Esteban
author Millones, Ana
author_facet Millones, Ana
Frere, Esteban
author_role author
author2 Frere, Esteban
author2_role author
dc.subject.none.fl_str_mv ARGENTINA
MICROCLIMATE CONDITIONS
NEST SITE FEATURES
NEST SUCCESS
PRODUCTIVITY
RED-LEGGED CORMORANTS
topic ARGENTINA
MICROCLIMATE CONDITIONS
NEST SITE FEATURES
NEST SUCCESS
PRODUCTIVITY
RED-LEGGED CORMORANTS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv For seabirds, nest site features are an important factor that determines reproductive success. During three breeding seasons (2010-2012), we visited two coastal cliff colonies of Red-legged Cormorants halacrocorax gaimardi in the Ría Deseado, Argentina, and studied how nest site characteristics influenced their breeding success. We measured six physical characteristics at 46 nest sites, and we counted the number of fledglings produced each year from each nest (breeding success). We also related nest site temperature and wind exposure with nest site orientation. Breeding success was higher at nest sites with a broad base (greater capacity for holding young) and at nests that were less exposed to winds greater than 25 knots (46.25 km/h), which were sites with a north orientation. The lowest breeding success was observed in nest sites that were exposed to the strongest winds (i.e., sites with a south orientation). Strong winds often blow eggs and chicks away from the nests and increase opportunistic predation by gulls Larus sp. No significant relationship was found between nest site orientation and nest site temperature. Breeding success decreased with the distance to the nearest nest, which agrees with the idea that higher density of reproductive individuals reduces effectiveness of predators. Nest cover, distance from the top of the cliff, and distance from the tide line had no effect on breeding success at this study scale. Our results suggested that nest site haracteristics that were related to protection against adverse weather conditions (e.g., strong winds) and avian predation, in combination with a suitable nest space, determined the breeding success of Red-legged Cormorants.
Fil: Millones, Ana. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; Argentina
Fil: Frere, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Caleta Olivia. Centro de Investigaciones Puerto Deseado; Argentina
description For seabirds, nest site features are an important factor that determines reproductive success. During three breeding seasons (2010-2012), we visited two coastal cliff colonies of Red-legged Cormorants halacrocorax gaimardi in the Ría Deseado, Argentina, and studied how nest site characteristics influenced their breeding success. We measured six physical characteristics at 46 nest sites, and we counted the number of fledglings produced each year from each nest (breeding success). We also related nest site temperature and wind exposure with nest site orientation. Breeding success was higher at nest sites with a broad base (greater capacity for holding young) and at nests that were less exposed to winds greater than 25 knots (46.25 km/h), which were sites with a north orientation. The lowest breeding success was observed in nest sites that were exposed to the strongest winds (i.e., sites with a south orientation). Strong winds often blow eggs and chicks away from the nests and increase opportunistic predation by gulls Larus sp. No significant relationship was found between nest site orientation and nest site temperature. Breeding success decreased with the distance to the nearest nest, which agrees with the idea that higher density of reproductive individuals reduces effectiveness of predators. Nest cover, distance from the top of the cliff, and distance from the tide line had no effect on breeding success at this study scale. Our results suggested that nest site haracteristics that were related to protection against adverse weather conditions (e.g., strong winds) and avian predation, in combination with a suitable nest space, determined the breeding success of Red-legged Cormorants.
publishDate 2018
dc.date.none.fl_str_mv 2018-01
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/11336/100448
Millones, Ana; Frere, Esteban; How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi; Polish Academy of Sciences. Museum and Institute of Zoology; Acta Ornithologica; 52; 2; 1-2018; 239-244
0001-6454
CONICET Digital
CONICET
url http://hdl.handle.net/11336/100448
identifier_str_mv Millones, Ana; Frere, Esteban; How Nest Site Characteristics Influence Breeding Success in Red-legged Cormorants Phalacrocorax gaimardi; Polish Academy of Sciences. Museum and Institute of Zoology; Acta Ornithologica; 52; 2; 1-2018; 239-244
0001-6454
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/Acta-Ornithologica/volume-52/issue-2/00016454AO2017.52.2.011/How-Nest-Site-Characteristics-Influence-Breeding-Success-in-Red-legged/10.3161/00016454AO2017.52.2.011.short
info:eu-repo/semantics/altIdentifier/doi/10.3161/00016454AO2017.52.2.011
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Polish Academy of Sciences. Museum and Institute of Zoology
publisher.none.fl_str_mv Polish Academy of Sciences. Museum and Institute of Zoology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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