A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana

Autores
Simoy, Maria Veronica; Canziani, Graciela Ana
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Ñandú or Rhea americana is an autochthonous species perfectly adapted to the pampas environment and only distributed in South America. The species exhibits an unusual breeding system combining polygyny, polyandry, communal nests and exclusive male parental care, which seems to contradict the idea of selfish genes. Our aim has been to construct a mathematical model based on the short term population dynamics of Rhea, living in the wild or in semi-captivity, and taking into account environmental factors that vary from year to year. Due to the characteristics of its life cycle, it was necessary to develop a model that allows us to differentiate between the survival and fertility rates of each age group and the distinct behavior during breeding and non-breeding seasons. Therefore, a quarterly differentiated stage-structured discrete model was needed. Time steps of different lengths are used for modeling chicks or ?charos? on the one hand, and juveniles and adults on the other. Environmental variables have been incorporated into the model because they affect the reproductive success of the species. Different scenarios are given as illustrations of the model use. Finally, the possibility of harvesting has been introduced in the model. The model is intended as a first step towards more refined models and systematic data gathering with the purpose of leading the way to a computational tool for risk assessment and decision-making.
Fil: Simoy, Maria Veronica. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina
Fil: Canziani, Graciela Ana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; Argentina
Materia
RHEA AMERICANA
STAGE-STRUCTURED MATRIX MODELS
POPULATION DYNAMICS
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:11336/239493
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea AmericanaSimoy, Maria VeronicaCanziani, Graciela AnaRHEA AMERICANASTAGE-STRUCTURED MATRIX MODELSPOPULATION DYNAMICShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The Ñandú or Rhea americana is an autochthonous species perfectly adapted to the pampas environment and only distributed in South America. The species exhibits an unusual breeding system combining polygyny, polyandry, communal nests and exclusive male parental care, which seems to contradict the idea of selfish genes. Our aim has been to construct a mathematical model based on the short term population dynamics of Rhea, living in the wild or in semi-captivity, and taking into account environmental factors that vary from year to year. Due to the characteristics of its life cycle, it was necessary to develop a model that allows us to differentiate between the survival and fertility rates of each age group and the distinct behavior during breeding and non-breeding seasons. Therefore, a quarterly differentiated stage-structured discrete model was needed. Time steps of different lengths are used for modeling chicks or ?charos? on the one hand, and juveniles and adults on the other. Environmental variables have been incorporated into the model because they affect the reproductive success of the species. Different scenarios are given as illustrations of the model use. Finally, the possibility of harvesting has been introduced in the model. The model is intended as a first step towards more refined models and systematic data gathering with the purpose of leading the way to a computational tool for risk assessment and decision-making.Fil: Simoy, Maria Veronica. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; ArgentinaFil: Canziani, Graciela Ana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; ArgentinaWiley Blackwell Publishing, Inc2008-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/239493Simoy, Maria Veronica; Canziani, Graciela Ana; A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana; Wiley Blackwell Publishing, Inc; Natural Resource Modeling; 18; 2; 6-2008; 215-2330890-8575CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1939-7445.2005.tb00155.xinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1939-7445.2005.tb00155.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:33:48Zoai:ri.conicet.gov.ar:11336/239493instacron: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:34982025-11-05 10:33:49.253CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
title A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
spellingShingle A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
Simoy, Maria Veronica
RHEA AMERICANA
STAGE-STRUCTURED MATRIX MODELS
POPULATION DYNAMICS
title_short A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
title_full A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
title_fullStr A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
title_full_unstemmed A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
title_sort A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana
dc.creator.none.fl_str_mv Simoy, Maria Veronica
Canziani, Graciela Ana
author Simoy, Maria Veronica
author_facet Simoy, Maria Veronica
Canziani, Graciela Ana
author_role author
author2 Canziani, Graciela Ana
author2_role author
dc.subject.none.fl_str_mv RHEA AMERICANA
STAGE-STRUCTURED MATRIX MODELS
POPULATION DYNAMICS
topic RHEA AMERICANA
STAGE-STRUCTURED MATRIX MODELS
POPULATION DYNAMICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Ñandú or Rhea americana is an autochthonous species perfectly adapted to the pampas environment and only distributed in South America. The species exhibits an unusual breeding system combining polygyny, polyandry, communal nests and exclusive male parental care, which seems to contradict the idea of selfish genes. Our aim has been to construct a mathematical model based on the short term population dynamics of Rhea, living in the wild or in semi-captivity, and taking into account environmental factors that vary from year to year. Due to the characteristics of its life cycle, it was necessary to develop a model that allows us to differentiate between the survival and fertility rates of each age group and the distinct behavior during breeding and non-breeding seasons. Therefore, a quarterly differentiated stage-structured discrete model was needed. Time steps of different lengths are used for modeling chicks or ?charos? on the one hand, and juveniles and adults on the other. Environmental variables have been incorporated into the model because they affect the reproductive success of the species. Different scenarios are given as illustrations of the model use. Finally, the possibility of harvesting has been introduced in the model. The model is intended as a first step towards more refined models and systematic data gathering with the purpose of leading the way to a computational tool for risk assessment and decision-making.
Fil: Simoy, Maria Veronica. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina
Fil: Canziani, Graciela Ana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; Argentina
description The Ñandú or Rhea americana is an autochthonous species perfectly adapted to the pampas environment and only distributed in South America. The species exhibits an unusual breeding system combining polygyny, polyandry, communal nests and exclusive male parental care, which seems to contradict the idea of selfish genes. Our aim has been to construct a mathematical model based on the short term population dynamics of Rhea, living in the wild or in semi-captivity, and taking into account environmental factors that vary from year to year. Due to the characteristics of its life cycle, it was necessary to develop a model that allows us to differentiate between the survival and fertility rates of each age group and the distinct behavior during breeding and non-breeding seasons. Therefore, a quarterly differentiated stage-structured discrete model was needed. Time steps of different lengths are used for modeling chicks or ?charos? on the one hand, and juveniles and adults on the other. Environmental variables have been incorporated into the model because they affect the reproductive success of the species. Different scenarios are given as illustrations of the model use. Finally, the possibility of harvesting has been introduced in the model. The model is intended as a first step towards more refined models and systematic data gathering with the purpose of leading the way to a computational tool for risk assessment and decision-making.
publishDate 2008
dc.date.none.fl_str_mv 2008-06
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/11336/239493
Simoy, Maria Veronica; Canziani, Graciela Ana; A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana; Wiley Blackwell Publishing, Inc; Natural Resource Modeling; 18; 2; 6-2008; 215-233
0890-8575
CONICET Digital
CONICET
url http://hdl.handle.net/11336/239493
identifier_str_mv Simoy, Maria Veronica; Canziani, Graciela Ana; A Stage-Structured Model with Two Time-Steps for Analyzing the Population Dynamics of Rhea Americana; Wiley Blackwell Publishing, Inc; Natural Resource Modeling; 18; 2; 6-2008; 215-233
0890-8575
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://onlinelibrary.wiley.com/doi/abs/10.1111/j.1939-7445.2005.tb00155.x
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1939-7445.2005.tb00155.x
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
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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score 13.087074

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