Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina
- Autores
- Malzof, Silvina L.; Bolkovic, Maria L.; Thompson, Jeffrey J.; Quintana, Ruben Dario
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Summary The Dusky-legged Guan Penelope obscura is the southernmost species of the family Cracidae, reaching its southern distributional limit in the delta of the Paraná River. Habitat loss, together with uncontrolled harvest, has led to local-scale decreases or extirpation of the species, but no quantitative evaluation of habitat preferences has been made. We surveyed Dusky-legged Guans in the Delta del Paraná Biosphere Reserve, Argentina, by motorboat along 543.9 km of nine waterways during both January and July 2009 and used occupancy modelling to estimate habitat and seasonal effects on occupancy. Detectability was 21-22% on average and occupancy estimates were highly variable within habitats, but highest in secondary forest, followed by mature plantation, and lowest in occupied residences. There were no significant differences in occupancy or detectability among habitats or seasonally. There was a strong positive effect of length of riparian habitat segments on occupancy and detectability. Habitat management efforts should address increasing the suitability of mature plantation forest for guans by increasing their similarity to native forest in structure and composition. Furthermore, we illustrate that surveys by boat can be logistically effective for surveying cracids associated with riverine habitats and that it is important to account for incomplete detectability since in our case failing to do so would have underestimated occupancy by 78-79% on average. Given this, the use of commonly accepted methodologies for surveying cracids that do not account for incomplete detectability should be reconsidered and methodologies that can produce robust, reliable estimates applied. Copyright © BirdLife International 2012.
Fil: Malzof, Silvina L.. Universidad de Buenos Aires; Argentina
Fil: Bolkovic, Maria L.. Secretaría de Ambiente y Desarrollo Sustentable de la Nación; Argentina
Fil: Thompson, Jeffrey J.. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales; Argentina
Fil: Quintana, Ruben Dario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; Argentina - Materia
-
Argentina
Cracidae
Galliformes
habitat use
occupancy
Paraná River Delta
Penelope obscura - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/77794
Ver los metadatos del registro completo
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Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, ArgentinaMalzof, Silvina L.Bolkovic, Maria L.Thompson, Jeffrey J.Quintana, Ruben DarioArgentinaCracidaeGalliformeshabitat useoccupancyParaná River DeltaPenelope obscurahttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Summary The Dusky-legged Guan Penelope obscura is the southernmost species of the family Cracidae, reaching its southern distributional limit in the delta of the Paraná River. Habitat loss, together with uncontrolled harvest, has led to local-scale decreases or extirpation of the species, but no quantitative evaluation of habitat preferences has been made. We surveyed Dusky-legged Guans in the Delta del Paraná Biosphere Reserve, Argentina, by motorboat along 543.9 km of nine waterways during both January and July 2009 and used occupancy modelling to estimate habitat and seasonal effects on occupancy. Detectability was 21-22% on average and occupancy estimates were highly variable within habitats, but highest in secondary forest, followed by mature plantation, and lowest in occupied residences. There were no significant differences in occupancy or detectability among habitats or seasonally. There was a strong positive effect of length of riparian habitat segments on occupancy and detectability. Habitat management efforts should address increasing the suitability of mature plantation forest for guans by increasing their similarity to native forest in structure and composition. Furthermore, we illustrate that surveys by boat can be logistically effective for surveying cracids associated with riverine habitats and that it is important to account for incomplete detectability since in our case failing to do so would have underestimated occupancy by 78-79% on average. Given this, the use of commonly accepted methodologies for surveying cracids that do not account for incomplete detectability should be reconsidered and methodologies that can produce robust, reliable estimates applied. Copyright © BirdLife International 2012.Fil: Malzof, Silvina L.. Universidad de Buenos Aires; ArgentinaFil: Bolkovic, Maria L.. Secretaría de Ambiente y Desarrollo Sustentable de la Nación; ArgentinaFil: Thompson, Jeffrey J.. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales; ArgentinaFil: Quintana, Ruben Dario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; ArgentinaCambridge University Press2013-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/77794Malzof, Silvina L.; Bolkovic, Maria L.; Thompson, Jeffrey J.; Quintana, Ruben Dario; Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina; Cambridge University Press; Bird Conservation International; 23; 1; 3-2013; 83-900959-2709CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1017/S0959270912000160info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/bird-conservation-international/article/habitat-occupancy-of-the-duskylegged-guan-in-the-lower-delta-of-the-parana-river-argentina/9A730F977605CCB4C4FAD56B7B83F49Dinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:10:21Zoai:ri.conicet.gov.ar:11336/77794instacron: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:34982025-09-29 10:10:21.792CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
title |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
spellingShingle |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina Malzof, Silvina L. Argentina Cracidae Galliformes habitat use occupancy Paraná River Delta Penelope obscura |
title_short |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
title_full |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
title_fullStr |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
title_full_unstemmed |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
title_sort |
Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina |
dc.creator.none.fl_str_mv |
Malzof, Silvina L. Bolkovic, Maria L. Thompson, Jeffrey J. Quintana, Ruben Dario |
author |
Malzof, Silvina L. |
author_facet |
Malzof, Silvina L. Bolkovic, Maria L. Thompson, Jeffrey J. Quintana, Ruben Dario |
author_role |
author |
author2 |
Bolkovic, Maria L. Thompson, Jeffrey J. Quintana, Ruben Dario |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Argentina Cracidae Galliformes habitat use occupancy Paraná River Delta Penelope obscura |
topic |
Argentina Cracidae Galliformes habitat use occupancy Paraná River Delta Penelope obscura |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Summary The Dusky-legged Guan Penelope obscura is the southernmost species of the family Cracidae, reaching its southern distributional limit in the delta of the Paraná River. Habitat loss, together with uncontrolled harvest, has led to local-scale decreases or extirpation of the species, but no quantitative evaluation of habitat preferences has been made. We surveyed Dusky-legged Guans in the Delta del Paraná Biosphere Reserve, Argentina, by motorboat along 543.9 km of nine waterways during both January and July 2009 and used occupancy modelling to estimate habitat and seasonal effects on occupancy. Detectability was 21-22% on average and occupancy estimates were highly variable within habitats, but highest in secondary forest, followed by mature plantation, and lowest in occupied residences. There were no significant differences in occupancy or detectability among habitats or seasonally. There was a strong positive effect of length of riparian habitat segments on occupancy and detectability. Habitat management efforts should address increasing the suitability of mature plantation forest for guans by increasing their similarity to native forest in structure and composition. Furthermore, we illustrate that surveys by boat can be logistically effective for surveying cracids associated with riverine habitats and that it is important to account for incomplete detectability since in our case failing to do so would have underestimated occupancy by 78-79% on average. Given this, the use of commonly accepted methodologies for surveying cracids that do not account for incomplete detectability should be reconsidered and methodologies that can produce robust, reliable estimates applied. Copyright © BirdLife International 2012. Fil: Malzof, Silvina L.. Universidad de Buenos Aires; Argentina Fil: Bolkovic, Maria L.. Secretaría de Ambiente y Desarrollo Sustentable de la Nación; Argentina Fil: Thompson, Jeffrey J.. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales; Argentina Fil: Quintana, Ruben Dario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; Argentina |
description |
Summary The Dusky-legged Guan Penelope obscura is the southernmost species of the family Cracidae, reaching its southern distributional limit in the delta of the Paraná River. Habitat loss, together with uncontrolled harvest, has led to local-scale decreases or extirpation of the species, but no quantitative evaluation of habitat preferences has been made. We surveyed Dusky-legged Guans in the Delta del Paraná Biosphere Reserve, Argentina, by motorboat along 543.9 km of nine waterways during both January and July 2009 and used occupancy modelling to estimate habitat and seasonal effects on occupancy. Detectability was 21-22% on average and occupancy estimates were highly variable within habitats, but highest in secondary forest, followed by mature plantation, and lowest in occupied residences. There were no significant differences in occupancy or detectability among habitats or seasonally. There was a strong positive effect of length of riparian habitat segments on occupancy and detectability. Habitat management efforts should address increasing the suitability of mature plantation forest for guans by increasing their similarity to native forest in structure and composition. Furthermore, we illustrate that surveys by boat can be logistically effective for surveying cracids associated with riverine habitats and that it is important to account for incomplete detectability since in our case failing to do so would have underestimated occupancy by 78-79% on average. Given this, the use of commonly accepted methodologies for surveying cracids that do not account for incomplete detectability should be reconsidered and methodologies that can produce robust, reliable estimates applied. Copyright © BirdLife International 2012. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-03 |
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/11336/77794 Malzof, Silvina L.; Bolkovic, Maria L.; Thompson, Jeffrey J.; Quintana, Ruben Dario; Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina; Cambridge University Press; Bird Conservation International; 23; 1; 3-2013; 83-90 0959-2709 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/77794 |
identifier_str_mv |
Malzof, Silvina L.; Bolkovic, Maria L.; Thompson, Jeffrey J.; Quintana, Ruben Dario; Habitat occupancy of the Dusky-legged Guan in the lower delta of the Paraná River, Argentina; Cambridge University Press; Bird Conservation International; 23; 1; 3-2013; 83-90 0959-2709 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0959270912000160 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/bird-conservation-international/article/habitat-occupancy-of-the-duskylegged-guan-in-the-lower-delta-of-the-parana-river-argentina/9A730F977605CCB4C4FAD56B7B83F49D |
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 |
Cambridge University Press |
publisher.none.fl_str_mv |
Cambridge University Press |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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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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13.070432 |