Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding

Autores
Raya Rey, Andrea Nélida; Pütz, Klemens; Scioscia, Gabriela; Lthi, Benno; Schiavini, Adrian Carlos Miguel
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Understanding the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. We studied the diving behaviour of breeding Magellanic Penguins (Spheniscus magellanicus), using time-depth recorders, during incubation and brooding in the 200304 and 200405 breeding seasons at Isla Martillo, Tierra del Fuego, Argentina. Foraging trips during the incubation period were longer than those during the brooding period for both sexes in both years of the study. Sex-related differences in foraging behaviour were observed during the incubation stage. During the incubation stage females performed longer foraging trips than males, foraging effort was lower, and did not dive as deep as males in both years. Foraging success was lower for females than males during incubation only in 2003. Our results suggest that sexual differences, expressed as differences in the foraging parameters of males and females, only develop when Fuegian Sprat (Sprattus fuegensis), the main prey in this locality, is not abundant close to the colony. Females may be extending the volume of water they can exploit by extending the duration of trips (horizontal distance), whereas males do so by diving deeper (vertical distance). Our results show the fundamental differences in foraging strategies between the sexes in Magellanic Penguin are a consequence of environmental conditions not morphological differences between sexes.
Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Pütz, Klemens. Antarctic Research Trust; Alemania
Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Lthi, Benno. Antarctic Research Trust; Alemania
Fil: Schiavini, Adrian Carlos Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Materia
BEAGLE CHANNEL
DIVING BEHAVIOUR
FORAGING ECOLOGY
FORAGING STRATEGIES
SEABIRDS
SEXUAL DIMORPHISM
TIERRA DEL FUEGO
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:11336/94845
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/94845
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breedingRaya Rey, Andrea NélidaPütz, KlemensScioscia, GabrielaLthi, BennoSchiavini, Adrian Carlos MiguelBEAGLE CHANNELDIVING BEHAVIOURFORAGING ECOLOGYFORAGING STRATEGIESSEABIRDSSEXUAL DIMORPHISMTIERRA DEL FUEGOhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Understanding the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. We studied the diving behaviour of breeding Magellanic Penguins (Spheniscus magellanicus), using time-depth recorders, during incubation and brooding in the 200304 and 200405 breeding seasons at Isla Martillo, Tierra del Fuego, Argentina. Foraging trips during the incubation period were longer than those during the brooding period for both sexes in both years of the study. Sex-related differences in foraging behaviour were observed during the incubation stage. During the incubation stage females performed longer foraging trips than males, foraging effort was lower, and did not dive as deep as males in both years. Foraging success was lower for females than males during incubation only in 2003. Our results suggest that sexual differences, expressed as differences in the foraging parameters of males and females, only develop when Fuegian Sprat (Sprattus fuegensis), the main prey in this locality, is not abundant close to the colony. Females may be extending the volume of water they can exploit by extending the duration of trips (horizontal distance), whereas males do so by diving deeper (vertical distance). Our results show the fundamental differences in foraging strategies between the sexes in Magellanic Penguin are a consequence of environmental conditions not morphological differences between sexes.Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Pütz, Klemens. Antarctic Research Trust; AlemaniaFil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Lthi, Benno. Antarctic Research Trust; AlemaniaFil: Schiavini, Adrian Carlos Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaCsiro Publishing2012-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94845Raya Rey, Andrea Nélida; Pütz, Klemens; Scioscia, Gabriela; Lthi, Benno; Schiavini, Adrian Carlos Miguel; Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding; Csiro Publishing; Emu; 112; 2; 5-2012; 90-960158-4197CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1071/MU11065info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU11065info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:13:48Zoai:ri.conicet.gov.ar:11336/94845instacron: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 10:13:48.616CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
title Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
spellingShingle Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
Raya Rey, Andrea Nélida
BEAGLE CHANNEL
DIVING BEHAVIOUR
FORAGING ECOLOGY
FORAGING STRATEGIES
SEABIRDS
SEXUAL DIMORPHISM
TIERRA DEL FUEGO
title_short Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
title_full Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
title_fullStr Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
title_full_unstemmed Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
title_sort Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
dc.creator.none.fl_str_mv Raya Rey, Andrea Nélida
Pütz, Klemens
Scioscia, Gabriela
Lthi, Benno
Schiavini, Adrian Carlos Miguel
author Raya Rey, Andrea Nélida
author_facet Raya Rey, Andrea Nélida
Pütz, Klemens
Scioscia, Gabriela
Lthi, Benno
Schiavini, Adrian Carlos Miguel
author_role author
author2 Pütz, Klemens
Scioscia, Gabriela
Lthi, Benno
Schiavini, Adrian Carlos Miguel
author2_role author
author
author
author
dc.subject.none.fl_str_mv BEAGLE CHANNEL
DIVING BEHAVIOUR
FORAGING ECOLOGY
FORAGING STRATEGIES
SEABIRDS
SEXUAL DIMORPHISM
TIERRA DEL FUEGO
topic BEAGLE CHANNEL
DIVING BEHAVIOUR
FORAGING ECOLOGY
FORAGING STRATEGIES
SEABIRDS
SEXUAL DIMORPHISM
TIERRA DEL FUEGO
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 the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. We studied the diving behaviour of breeding Magellanic Penguins (Spheniscus magellanicus), using time-depth recorders, during incubation and brooding in the 200304 and 200405 breeding seasons at Isla Martillo, Tierra del Fuego, Argentina. Foraging trips during the incubation period were longer than those during the brooding period for both sexes in both years of the study. Sex-related differences in foraging behaviour were observed during the incubation stage. During the incubation stage females performed longer foraging trips than males, foraging effort was lower, and did not dive as deep as males in both years. Foraging success was lower for females than males during incubation only in 2003. Our results suggest that sexual differences, expressed as differences in the foraging parameters of males and females, only develop when Fuegian Sprat (Sprattus fuegensis), the main prey in this locality, is not abundant close to the colony. Females may be extending the volume of water they can exploit by extending the duration of trips (horizontal distance), whereas males do so by diving deeper (vertical distance). Our results show the fundamental differences in foraging strategies between the sexes in Magellanic Penguin are a consequence of environmental conditions not morphological differences between sexes.
Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Pütz, Klemens. Antarctic Research Trust; Alemania
Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Lthi, Benno. Antarctic Research Trust; Alemania
Fil: Schiavini, Adrian Carlos Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
description Understanding the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. We studied the diving behaviour of breeding Magellanic Penguins (Spheniscus magellanicus), using time-depth recorders, during incubation and brooding in the 200304 and 200405 breeding seasons at Isla Martillo, Tierra del Fuego, Argentina. Foraging trips during the incubation period were longer than those during the brooding period for both sexes in both years of the study. Sex-related differences in foraging behaviour were observed during the incubation stage. During the incubation stage females performed longer foraging trips than males, foraging effort was lower, and did not dive as deep as males in both years. Foraging success was lower for females than males during incubation only in 2003. Our results suggest that sexual differences, expressed as differences in the foraging parameters of males and females, only develop when Fuegian Sprat (Sprattus fuegensis), the main prey in this locality, is not abundant close to the colony. Females may be extending the volume of water they can exploit by extending the duration of trips (horizontal distance), whereas males do so by diving deeper (vertical distance). Our results show the fundamental differences in foraging strategies between the sexes in Magellanic Penguin are a consequence of environmental conditions not morphological differences between sexes.
publishDate 2012
dc.date.none.fl_str_mv 2012-05
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/11336/94845
Raya Rey, Andrea Nélida; Pütz, Klemens; Scioscia, Gabriela; Lthi, Benno; Schiavini, Adrian Carlos Miguel; Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding; Csiro Publishing; Emu; 112; 2; 5-2012; 90-96
0158-4197
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94845
identifier_str_mv Raya Rey, Andrea Nélida; Pütz, Klemens; Scioscia, Gabriela; Lthi, Benno; Schiavini, Adrian Carlos Miguel; Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding; Csiro Publishing; Emu; 112; 2; 5-2012; 90-96
0158-4197
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1071/MU11065
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU11065
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 Csiro Publishing
publisher.none.fl_str_mv Csiro Publishing
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
_version_ 1844614059250417664
score 13.070432

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