Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin

Autores
Ramírez, Francisco; Afán, Isabel; Hobson, Keith A.; Bertellotti, Nestor Marcelo; Blanco, Guillermo; Forero, Manuela G.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Understanding how top predators respond to natural and anthropogenically induced changes in their environment is a major conservation challenge especially in marine environments. We used a multidisciplinary approach to explore the mechanisms through which a typical central-place forager, the Magellanic penguin (Spheniscus magellanicus) from the Chubut province of Argentina, responds to variations in oceanic conditions and prey resources. We combined habitat and species distribution modeling with isotopic dietary reconstructions based on blood d13C and d15N values to quantify the role of bathymetry, sea-surface temperature and chlorophyll-a concentration, abundance of conspecifics, and extent of fisheries activities in explaining the foraging and feeding ecology of individuals breeding at different colonies. The at-sea distribution of penguins was tightly coupled with the spatial distribution of their staple prey species, anchovies (Engraulis anchoita), especially in areas over the continental shelf (.200 m depth), with relatively warm water (from 168 to 218C), and moderate abundances of conspecifics (from 50 to 250 individuals). Competition with conspecifics and human fisheries were also identified as important factors explaining penguin diet with decreasing relative contributions of anchovies with increasing abundance of conspecifics and fishing activity. Our multifactorial approach allowed us to simultaneously explore different physical, biological and anthropogenic features likely affecting marine resource availability, and, consequently, driving the feeding and foraging ecology of this central-place forager. Our approach can be extended to a large suite of central-place foragers, thus providing important advances in the way we investigate how to effectively conserve and manage these species.
Fil: Ramírez, Francisco. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; España
Fil: Afán, Isabel. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; España
Fil: Hobson, Keith A.. Evironment Canada; Canadá
Fil: Bertellotti, Nestor Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Blanco, Guillermo. Consejo Superior de Investigaciones Cientificas. Museo Nacional de Cs. Naturales; España
Fil: Forero, Manuela G.. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; España
Materia
MAGELLANIC PENGUINS
PATAGONIA
STABLES ISOTOPES
INDICATOR SPECIES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/7711
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/7711
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguinRamírez, FranciscoAfán, IsabelHobson, Keith A.Bertellotti, Nestor MarceloBlanco, GuillermoForero, Manuela G.MAGELLANIC PENGUINSPATAGONIASTABLES ISOTOPESINDICATOR SPECIEShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Understanding how top predators respond to natural and anthropogenically induced changes in their environment is a major conservation challenge especially in marine environments. We used a multidisciplinary approach to explore the mechanisms through which a typical central-place forager, the Magellanic penguin (Spheniscus magellanicus) from the Chubut province of Argentina, responds to variations in oceanic conditions and prey resources. We combined habitat and species distribution modeling with isotopic dietary reconstructions based on blood d13C and d15N values to quantify the role of bathymetry, sea-surface temperature and chlorophyll-a concentration, abundance of conspecifics, and extent of fisheries activities in explaining the foraging and feeding ecology of individuals breeding at different colonies. The at-sea distribution of penguins was tightly coupled with the spatial distribution of their staple prey species, anchovies (Engraulis anchoita), especially in areas over the continental shelf (.200 m depth), with relatively warm water (from 168 to 218C), and moderate abundances of conspecifics (from 50 to 250 individuals). Competition with conspecifics and human fisheries were also identified as important factors explaining penguin diet with decreasing relative contributions of anchovies with increasing abundance of conspecifics and fishing activity. Our multifactorial approach allowed us to simultaneously explore different physical, biological and anthropogenic features likely affecting marine resource availability, and, consequently, driving the feeding and foraging ecology of this central-place forager. Our approach can be extended to a large suite of central-place foragers, thus providing important advances in the way we investigate how to effectively conserve and manage these species.Fil: Ramírez, Francisco. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; EspañaFil: Afán, Isabel. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; EspañaFil: Hobson, Keith A.. Evironment Canada; CanadáFil: Bertellotti, Nestor Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Blanco, Guillermo. Consejo Superior de Investigaciones Cientificas. Museo Nacional de Cs. Naturales; EspañaFil: Forero, Manuela G.. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; EspañaWiley2014-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfhttp://hdl.handle.net/11336/7711Ramírez, Francisco; Afán, Isabel; Hobson, Keith A.; Bertellotti, Nestor Marcelo; Blanco, Guillermo; et al.; Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin; Wiley; Ecosphere; 5; 4; 1-4-2014; 1-212150-8925enginfo:eu-repo/semantics/altIdentifier/doi/10.1890/ES13-00297.1info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/wol1/doi/10.1890/ES13-00297.1/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:13:29Zoai:ri.conicet.gov.ar:11336/7711instacron: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:34982025-10-22 11:13:29.907CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
title Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
spellingShingle Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
Ramírez, Francisco
MAGELLANIC PENGUINS
PATAGONIA
STABLES ISOTOPES
INDICATOR SPECIES
title_short Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
title_full Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
title_fullStr Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
title_full_unstemmed Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
title_sort Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin
dc.creator.none.fl_str_mv Ramírez, Francisco
Afán, Isabel
Hobson, Keith A.
Bertellotti, Nestor Marcelo
Blanco, Guillermo
Forero, Manuela G.
author Ramírez, Francisco
author_facet Ramírez, Francisco
Afán, Isabel
Hobson, Keith A.
Bertellotti, Nestor Marcelo
Blanco, Guillermo
Forero, Manuela G.
author_role author
author2 Afán, Isabel
Hobson, Keith A.
Bertellotti, Nestor Marcelo
Blanco, Guillermo
Forero, Manuela G.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv MAGELLANIC PENGUINS
PATAGONIA
STABLES ISOTOPES
INDICATOR SPECIES
topic MAGELLANIC PENGUINS
PATAGONIA
STABLES ISOTOPES
INDICATOR SPECIES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Understanding how top predators respond to natural and anthropogenically induced changes in their environment is a major conservation challenge especially in marine environments. We used a multidisciplinary approach to explore the mechanisms through which a typical central-place forager, the Magellanic penguin (Spheniscus magellanicus) from the Chubut province of Argentina, responds to variations in oceanic conditions and prey resources. We combined habitat and species distribution modeling with isotopic dietary reconstructions based on blood d13C and d15N values to quantify the role of bathymetry, sea-surface temperature and chlorophyll-a concentration, abundance of conspecifics, and extent of fisheries activities in explaining the foraging and feeding ecology of individuals breeding at different colonies. The at-sea distribution of penguins was tightly coupled with the spatial distribution of their staple prey species, anchovies (Engraulis anchoita), especially in areas over the continental shelf (.200 m depth), with relatively warm water (from 168 to 218C), and moderate abundances of conspecifics (from 50 to 250 individuals). Competition with conspecifics and human fisheries were also identified as important factors explaining penguin diet with decreasing relative contributions of anchovies with increasing abundance of conspecifics and fishing activity. Our multifactorial approach allowed us to simultaneously explore different physical, biological and anthropogenic features likely affecting marine resource availability, and, consequently, driving the feeding and foraging ecology of this central-place forager. Our approach can be extended to a large suite of central-place foragers, thus providing important advances in the way we investigate how to effectively conserve and manage these species.
Fil: Ramírez, Francisco. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; España
Fil: Afán, Isabel. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; España
Fil: Hobson, Keith A.. Evironment Canada; Canadá
Fil: Bertellotti, Nestor Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Blanco, Guillermo. Consejo Superior de Investigaciones Cientificas. Museo Nacional de Cs. Naturales; España
Fil: Forero, Manuela G.. Consejo Superior de Investigaciones Cientificas. Estacion Biologica de Doñana; España
description Understanding how top predators respond to natural and anthropogenically induced changes in their environment is a major conservation challenge especially in marine environments. We used a multidisciplinary approach to explore the mechanisms through which a typical central-place forager, the Magellanic penguin (Spheniscus magellanicus) from the Chubut province of Argentina, responds to variations in oceanic conditions and prey resources. We combined habitat and species distribution modeling with isotopic dietary reconstructions based on blood d13C and d15N values to quantify the role of bathymetry, sea-surface temperature and chlorophyll-a concentration, abundance of conspecifics, and extent of fisheries activities in explaining the foraging and feeding ecology of individuals breeding at different colonies. The at-sea distribution of penguins was tightly coupled with the spatial distribution of their staple prey species, anchovies (Engraulis anchoita), especially in areas over the continental shelf (.200 m depth), with relatively warm water (from 168 to 218C), and moderate abundances of conspecifics (from 50 to 250 individuals). Competition with conspecifics and human fisheries were also identified as important factors explaining penguin diet with decreasing relative contributions of anchovies with increasing abundance of conspecifics and fishing activity. Our multifactorial approach allowed us to simultaneously explore different physical, biological and anthropogenic features likely affecting marine resource availability, and, consequently, driving the feeding and foraging ecology of this central-place forager. Our approach can be extended to a large suite of central-place foragers, thus providing important advances in the way we investigate how to effectively conserve and manage these species.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-01
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/11336/7711
Ramírez, Francisco; Afán, Isabel; Hobson, Keith A.; Bertellotti, Nestor Marcelo; Blanco, Guillermo; et al.; Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin; Wiley; Ecosphere; 5; 4; 1-4-2014; 1-21
2150-8925
url http://hdl.handle.net/11336/7711
identifier_str_mv Ramírez, Francisco; Afán, Isabel; Hobson, Keith A.; Bertellotti, Nestor Marcelo; Blanco, Guillermo; et al.; Natural and anthropogenic factors affecting the feeding ecology of a top marine predator, the Magellanic penguin; Wiley; Ecosphere; 5; 4; 1-4-2014; 1-21
2150-8925
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1890/ES13-00297.1
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/wol1/doi/10.1890/ES13-00297.1/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/vnd.openxmlformats-officedocument.wordprocessingml.document
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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 12.982451

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