A hunted population in recovery: Effective population size for South American sea lions from Patagonia

Autores
Grandi, Maria Florencia; Rosa de Oliveira, Larissa; Dans, Silvana Laura; Crespo, Enrique Alberto
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Effective population size (Ne) is a parameter of central importance in evolutionary biology and conservation. Factors such as unequal sex ratios of breeding individuals, periodic fluctuation in population size and variance in reproductive success can affect the Ne in general. At present, South American sea lions, Otaria flavescens, from northern Patagonia, Argentina, belongs to one of the several populations that are recovering from overhunting which occurred in the early 20th century. Here, we present the estimate of Ne for this population that takes into account the effects of their polygynous mating system and variation in population size through time. The resultant overall Nes were 4171 ± 2450 or 4745 ± 2681 breeding animals depending on the inclusion of peripheral adult males. The estimated Nes are not critical, because they are close to the average mean minimum viable population for vertebrates (5000 breeding adults). Even though the northern Patagonian population of O. flavescens is increasing its abundance is still far below its historical numbers. The Ne estimated should be considered the minimum range to be maintained, especially in light of bycatch related to fishery interactions along the Patagonian coast. We emphasise the importance of estimating Ne for future management plans of the species within different populations. © 2012 Koninklijke Brill NV, Leiden.
Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Rosa de Oliveira, Larissa. Universidade do Vale do Rio dos Sinos ; Brasil. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil
Fil: Dans, Silvana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia San Juan Bosco; Argentina
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia San Juan Bosco; Argentina
Materia
Alternative Mating Systems
Conservation Implications
Effective Population Size
Otaria Flavescens
Recovery Population
South America Sea Lion
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:11336/68881
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A hunted population in recovery: Effective population size for South American sea lions from PatagoniaGrandi, Maria FlorenciaRosa de Oliveira, LarissaDans, Silvana LauraCrespo, Enrique AlbertoAlternative Mating SystemsConservation ImplicationsEffective Population SizeOtaria FlavescensRecovery PopulationSouth America Sea Lionhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Effective population size (Ne) is a parameter of central importance in evolutionary biology and conservation. Factors such as unequal sex ratios of breeding individuals, periodic fluctuation in population size and variance in reproductive success can affect the Ne in general. At present, South American sea lions, Otaria flavescens, from northern Patagonia, Argentina, belongs to one of the several populations that are recovering from overhunting which occurred in the early 20th century. Here, we present the estimate of Ne for this population that takes into account the effects of their polygynous mating system and variation in population size through time. The resultant overall Nes were 4171 ± 2450 or 4745 ± 2681 breeding animals depending on the inclusion of peripheral adult males. The estimated Nes are not critical, because they are close to the average mean minimum viable population for vertebrates (5000 breeding adults). Even though the northern Patagonian population of O. flavescens is increasing its abundance is still far below its historical numbers. The Ne estimated should be considered the minimum range to be maintained, especially in light of bycatch related to fishery interactions along the Patagonian coast. We emphasise the importance of estimating Ne for future management plans of the species within different populations. © 2012 Koninklijke Brill NV, Leiden.Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Rosa de Oliveira, Larissa. Universidade do Vale do Rio dos Sinos ; Brasil. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; BrasilFil: Dans, Silvana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia San Juan Bosco; ArgentinaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia San Juan Bosco; ArgentinaBrill Academic Publishers2012-04info: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/11336/68881Grandi, Maria Florencia; Rosa de Oliveira, Larissa; Dans, Silvana Laura; Crespo, Enrique Alberto; A hunted population in recovery: Effective population size for South American sea lions from Patagonia; Brill Academic Publishers; Animal Biology; 62; 4; 4-2012; 433-4501570-7563CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://brill.com/view/journals/ab/ab-overview.xmlinfo:eu-repo/semantics/altIdentifier/doi/10.1163/157075612X642941info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:00:42Zoai:ri.conicet.gov.ar:11336/68881instacron: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:34982025-09-10 13:00:42.833CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A hunted population in recovery: Effective population size for South American sea lions from Patagonia
title A hunted population in recovery: Effective population size for South American sea lions from Patagonia
spellingShingle A hunted population in recovery: Effective population size for South American sea lions from Patagonia
Grandi, Maria Florencia
Alternative Mating Systems
Conservation Implications
Effective Population Size
Otaria Flavescens
Recovery Population
South America Sea Lion
title_short A hunted population in recovery: Effective population size for South American sea lions from Patagonia
title_full A hunted population in recovery: Effective population size for South American sea lions from Patagonia
title_fullStr A hunted population in recovery: Effective population size for South American sea lions from Patagonia
title_full_unstemmed A hunted population in recovery: Effective population size for South American sea lions from Patagonia
title_sort A hunted population in recovery: Effective population size for South American sea lions from Patagonia
dc.creator.none.fl_str_mv Grandi, Maria Florencia
Rosa de Oliveira, Larissa
Dans, Silvana Laura
Crespo, Enrique Alberto
author Grandi, Maria Florencia
author_facet Grandi, Maria Florencia
Rosa de Oliveira, Larissa
Dans, Silvana Laura
Crespo, Enrique Alberto
author_role author
author2 Rosa de Oliveira, Larissa
Dans, Silvana Laura
Crespo, Enrique Alberto
author2_role author
author
author
dc.subject.none.fl_str_mv Alternative Mating Systems
Conservation Implications
Effective Population Size
Otaria Flavescens
Recovery Population
South America Sea Lion
topic Alternative Mating Systems
Conservation Implications
Effective Population Size
Otaria Flavescens
Recovery Population
South America Sea Lion
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Effective population size (Ne) is a parameter of central importance in evolutionary biology and conservation. Factors such as unequal sex ratios of breeding individuals, periodic fluctuation in population size and variance in reproductive success can affect the Ne in general. At present, South American sea lions, Otaria flavescens, from northern Patagonia, Argentina, belongs to one of the several populations that are recovering from overhunting which occurred in the early 20th century. Here, we present the estimate of Ne for this population that takes into account the effects of their polygynous mating system and variation in population size through time. The resultant overall Nes were 4171 ± 2450 or 4745 ± 2681 breeding animals depending on the inclusion of peripheral adult males. The estimated Nes are not critical, because they are close to the average mean minimum viable population for vertebrates (5000 breeding adults). Even though the northern Patagonian population of O. flavescens is increasing its abundance is still far below its historical numbers. The Ne estimated should be considered the minimum range to be maintained, especially in light of bycatch related to fishery interactions along the Patagonian coast. We emphasise the importance of estimating Ne for future management plans of the species within different populations. © 2012 Koninklijke Brill NV, Leiden.
Fil: Grandi, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Rosa de Oliveira, Larissa. Universidade do Vale do Rio dos Sinos ; Brasil. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil
Fil: Dans, Silvana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia San Juan Bosco; Argentina
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia San Juan Bosco; Argentina
description Effective population size (Ne) is a parameter of central importance in evolutionary biology and conservation. Factors such as unequal sex ratios of breeding individuals, periodic fluctuation in population size and variance in reproductive success can affect the Ne in general. At present, South American sea lions, Otaria flavescens, from northern Patagonia, Argentina, belongs to one of the several populations that are recovering from overhunting which occurred in the early 20th century. Here, we present the estimate of Ne for this population that takes into account the effects of their polygynous mating system and variation in population size through time. The resultant overall Nes were 4171 ± 2450 or 4745 ± 2681 breeding animals depending on the inclusion of peripheral adult males. The estimated Nes are not critical, because they are close to the average mean minimum viable population for vertebrates (5000 breeding adults). Even though the northern Patagonian population of O. flavescens is increasing its abundance is still far below its historical numbers. The Ne estimated should be considered the minimum range to be maintained, especially in light of bycatch related to fishery interactions along the Patagonian coast. We emphasise the importance of estimating Ne for future management plans of the species within different populations. © 2012 Koninklijke Brill NV, Leiden.
publishDate 2012
dc.date.none.fl_str_mv 2012-04
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/11336/68881
Grandi, Maria Florencia; Rosa de Oliveira, Larissa; Dans, Silvana Laura; Crespo, Enrique Alberto; A hunted population in recovery: Effective population size for South American sea lions from Patagonia; Brill Academic Publishers; Animal Biology; 62; 4; 4-2012; 433-450
1570-7563
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68881
identifier_str_mv Grandi, Maria Florencia; Rosa de Oliveira, Larissa; Dans, Silvana Laura; Crespo, Enrique Alberto; A hunted population in recovery: Effective population size for South American sea lions from Patagonia; Brill Academic Publishers; Animal Biology; 62; 4; 4-2012; 433-450
1570-7563
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://brill.com/view/journals/ab/ab-overview.xml
info:eu-repo/semantics/altIdentifier/doi/10.1163/157075612X642941
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 Brill Academic Publishers
publisher.none.fl_str_mv Brill Academic Publishers
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 12.48226

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