Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina

Autores
Harris, Sabrina; Pütz, Klemens; Scioscia, Gabriela; Raya Rey, Andrea Nélida
Año de publicación
2024
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Life history theory states long-lived individuals compromise between current reproduction and survival over successive breeding attempts in order to maximize their fitness. Seabirds must forage efficiently to breed successfully, and the cost of reproduction may be reflected in higher stress levels of the breeding individuals. Knownage breeding Magellanic penguins Spheniscus magellanicus, between 4 and 20 years old, with less than 20-day old chicks were equipped with GPS devices (IgotU) and TDR – accelerometers (DVL-400, Little Leonardo, Japan) for one foraging trip on the same day (n = 10). Upon recovery of devices, a drop of blood was extracted from their tarsal vein and blood smears were made in situ and stained in the laboratory with Giemsa stain. Foraging distance increased (F = 9.98, p = 0.01), and path sinuosity decreased with age of breeders (F = 5.49, p = 0.04). Heterophil to lymphocyte ratio, used as a proxi of stress, also decreased with age (F = 7.66, p = 0.02). Older individuals went further and in straighter paths and had lower stress levels than younger breeders, which may indicate individuals continue adjusting their foraging behaviour on successive breeding attempts and lower stress levels may be reflecting more efficient behaviors as individuals age. Life-long fitness of individuals is defined as the number of offspring produced given the accumulative costs of reproduction and the current study on Magellanic penguins suggests these costs seem to reduce as individuals age.
Fil: Harris, Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Wildlife Conservation Society; Estados Unidos
Fil: Pütz, Klemens. Antarctic Research Trust; Alemania
Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Raya Rey, Andrea Nélida. Wildlife Conservation Society; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
11th International Penguin Congress
Viña del Mar
Chile
Pontificia Universidad Católica de Chile
Universidad Andres Bello
Universidad Católica del Norte
Biosiversity of Antarctic and Subantarctic Ecosystems
Materia
GPS DEVICES
TDR ACCELOREMETERS
BEAGLE CHANNEL
FORAGING EFFORT AND EFFICIENT
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:11336/274752
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/274752
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network_name_str CONICET Digital (CONICET)
spelling Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., ArgentinaHarris, SabrinaPütz, KlemensScioscia, GabrielaRaya Rey, Andrea NélidaGPS DEVICESTDR ACCELOREMETERSBEAGLE CHANNELFORAGING EFFORT AND EFFICIENThttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Life history theory states long-lived individuals compromise between current reproduction and survival over successive breeding attempts in order to maximize their fitness. Seabirds must forage efficiently to breed successfully, and the cost of reproduction may be reflected in higher stress levels of the breeding individuals. Knownage breeding Magellanic penguins Spheniscus magellanicus, between 4 and 20 years old, with less than 20-day old chicks were equipped with GPS devices (IgotU) and TDR – accelerometers (DVL-400, Little Leonardo, Japan) for one foraging trip on the same day (n = 10). Upon recovery of devices, a drop of blood was extracted from their tarsal vein and blood smears were made in situ and stained in the laboratory with Giemsa stain. Foraging distance increased (F = 9.98, p = 0.01), and path sinuosity decreased with age of breeders (F = 5.49, p = 0.04). Heterophil to lymphocyte ratio, used as a proxi of stress, also decreased with age (F = 7.66, p = 0.02). Older individuals went further and in straighter paths and had lower stress levels than younger breeders, which may indicate individuals continue adjusting their foraging behaviour on successive breeding attempts and lower stress levels may be reflecting more efficient behaviors as individuals age. Life-long fitness of individuals is defined as the number of offspring produced given the accumulative costs of reproduction and the current study on Magellanic penguins suggests these costs seem to reduce as individuals age.Fil: Harris, Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Wildlife Conservation Society; Estados UnidosFil: Pütz, Klemens. Antarctic Research Trust; AlemaniaFil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Raya Rey, Andrea Nélida. Wildlife Conservation Society; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina11th International Penguin CongressViña del MarChilePontificia Universidad Católica de ChileUniversidad Andres BelloUniversidad Católica del NorteBiosiversity of Antarctic and Subantarctic EcosystemsUniversidad Andres Bello2024info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/274752Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina; 11th International Penguin Congress; Viña del Mar; Chile; 2023; 35-35CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.penguin-conference.com/wp-content/uploads/2025/08/IPC11_Abstract_2023_Vina_del_Mar.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T14:18:06Zoai:ri.conicet.gov.ar:11336/274752instacron: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:34982025-12-23 14:18:07.098CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
title Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
spellingShingle Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
Harris, Sabrina
GPS DEVICES
TDR ACCELOREMETERS
BEAGLE CHANNEL
FORAGING EFFORT AND EFFICIENT
title_short Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
title_full Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
title_fullStr Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
title_full_unstemmed Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
title_sort Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina
dc.creator.none.fl_str_mv Harris, Sabrina
Pütz, Klemens
Scioscia, Gabriela
Raya Rey, Andrea Nélida
author Harris, Sabrina
author_facet Harris, Sabrina
Pütz, Klemens
Scioscia, Gabriela
Raya Rey, Andrea Nélida
author_role author
author2 Pütz, Klemens
Scioscia, Gabriela
Raya Rey, Andrea Nélida
author2_role author
author
author
dc.subject.none.fl_str_mv GPS DEVICES
TDR ACCELOREMETERS
BEAGLE CHANNEL
FORAGING EFFORT AND EFFICIENT
topic GPS DEVICES
TDR ACCELOREMETERS
BEAGLE CHANNEL
FORAGING EFFORT AND EFFICIENT
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Life history theory states long-lived individuals compromise between current reproduction and survival over successive breeding attempts in order to maximize their fitness. Seabirds must forage efficiently to breed successfully, and the cost of reproduction may be reflected in higher stress levels of the breeding individuals. Knownage breeding Magellanic penguins Spheniscus magellanicus, between 4 and 20 years old, with less than 20-day old chicks were equipped with GPS devices (IgotU) and TDR – accelerometers (DVL-400, Little Leonardo, Japan) for one foraging trip on the same day (n = 10). Upon recovery of devices, a drop of blood was extracted from their tarsal vein and blood smears were made in situ and stained in the laboratory with Giemsa stain. Foraging distance increased (F = 9.98, p = 0.01), and path sinuosity decreased with age of breeders (F = 5.49, p = 0.04). Heterophil to lymphocyte ratio, used as a proxi of stress, also decreased with age (F = 7.66, p = 0.02). Older individuals went further and in straighter paths and had lower stress levels than younger breeders, which may indicate individuals continue adjusting their foraging behaviour on successive breeding attempts and lower stress levels may be reflecting more efficient behaviors as individuals age. Life-long fitness of individuals is defined as the number of offspring produced given the accumulative costs of reproduction and the current study on Magellanic penguins suggests these costs seem to reduce as individuals age.
Fil: Harris, Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Wildlife Conservation Society; Estados Unidos
Fil: Pütz, Klemens. Antarctic Research Trust; Alemania
Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Raya Rey, Andrea Nélida. Wildlife Conservation Society; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
11th International Penguin Congress
Viña del Mar
Chile
Pontificia Universidad Católica de Chile
Universidad Andres Bello
Universidad Católica del Norte
Biosiversity of Antarctic and Subantarctic Ecosystems
description Life history theory states long-lived individuals compromise between current reproduction and survival over successive breeding attempts in order to maximize their fitness. Seabirds must forage efficiently to breed successfully, and the cost of reproduction may be reflected in higher stress levels of the breeding individuals. Knownage breeding Magellanic penguins Spheniscus magellanicus, between 4 and 20 years old, with less than 20-day old chicks were equipped with GPS devices (IgotU) and TDR – accelerometers (DVL-400, Little Leonardo, Japan) for one foraging trip on the same day (n = 10). Upon recovery of devices, a drop of blood was extracted from their tarsal vein and blood smears were made in situ and stained in the laboratory with Giemsa stain. Foraging distance increased (F = 9.98, p = 0.01), and path sinuosity decreased with age of breeders (F = 5.49, p = 0.04). Heterophil to lymphocyte ratio, used as a proxi of stress, also decreased with age (F = 7.66, p = 0.02). Older individuals went further and in straighter paths and had lower stress levels than younger breeders, which may indicate individuals continue adjusting their foraging behaviour on successive breeding attempts and lower stress levels may be reflecting more efficient behaviors as individuals age. Life-long fitness of individuals is defined as the number of offspring produced given the accumulative costs of reproduction and the current study on Magellanic penguins suggests these costs seem to reduce as individuals age.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/274752
Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina; 11th International Penguin Congress; Viña del Mar; Chile; 2023; 35-35
CONICET Digital
CONICET
url http://hdl.handle.net/11336/274752
identifier_str_mv Does age matter?: Foraging behavior and stress of known-age breeding Magellanic penguins Spheniscus magellanicus at Matillo Isl., Argentina; 11th International Penguin Congress; Viña del Mar; Chile; 2023; 35-35
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://www.penguin-conference.com/wp-content/uploads/2025/08/IPC11_Abstract_2023_Vina_del_Mar.pdf
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.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Universidad Andres Bello
publisher.none.fl_str_mv Universidad Andres Bello
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 12.952241

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