Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology

Autores
Dodino, Samanta Graciela; Raya Rey, Andrea Nélida; Riccialdelli, Luciana; Polito, Michael; Pütz, Klemens
Año de publicación
2020
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The dispersal of penguins during the non-breeding period is a critical period that can affect breeding success and survival in the following season. Thus, knowledge of penguin foraging ecology during this energy-intensive period is crucial to understand their responses to ecosystem variability. We recorded winter dispersal of Magellanic penguins Spheniscus magellanicus from Martillo Island (Beagle Channel, Argentina) using LAT2900 geolocators in 2017. We collected whole blood samples when the penguins first arrived at the colony in spring to study their pre-breeding foraging niche using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. In total, 26 adults were equipped after their annual molt, of which 24 were re-captured. However, only 20 were still equipped with devices and only 9 datasets could be recovered successfully. We found that penguins dispersed north along the Patagonian coast up to just south of Buenos Aires, Argentina (<38°S). In addition, prior to their return to the breeding site (August-September), females were mainly concentrated in more southern waters (between 49° S to 55°S) relative to males (between 41°S to 45°S). We also observed a significant difference between sexes in δ13C (W= 25, p<0.05) but not in δ15N values (W= 53, p>0.05), with females also having larger isotopic foraging niche widths (SEAb) relative to males. Differences in the spatial distribution and isotopic values between sexes likely reflect a pattern of niche partitioning during the non-breeding period. These results provide insights into mechanisms that may reduce intraspecific competition and can possibly inform sex-specific conservation strategies during the non-breeding period.
Fil: Dodino, Samanta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Polito, Michael. Department Of Oceanography And Costal Sciencies; Estados Unidos
Fil: Pütz, Klemens. Antartic Research Trust; Alemania
10th International Penguin Conference
Dunedin
Nueva Zelanda
University of Otago
Materia
Magellanic penguin
isotopes
winter dispersal
geolocators
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:11336/195385
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecologyDodino, Samanta GracielaRaya Rey, Andrea NélidaRiccialdelli, LucianaPolito, MichaelPütz, KlemensMagellanic penguinisotopeswinter dispersalgeolocatorshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The dispersal of penguins during the non-breeding period is a critical period that can affect breeding success and survival in the following season. Thus, knowledge of penguin foraging ecology during this energy-intensive period is crucial to understand their responses to ecosystem variability. We recorded winter dispersal of Magellanic penguins Spheniscus magellanicus from Martillo Island (Beagle Channel, Argentina) using LAT2900 geolocators in 2017. We collected whole blood samples when the penguins first arrived at the colony in spring to study their pre-breeding foraging niche using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. In total, 26 adults were equipped after their annual molt, of which 24 were re-captured. However, only 20 were still equipped with devices and only 9 datasets could be recovered successfully. We found that penguins dispersed north along the Patagonian coast up to just south of Buenos Aires, Argentina (<38°S). In addition, prior to their return to the breeding site (August-September), females were mainly concentrated in more southern waters (between 49° S to 55°S) relative to males (between 41°S to 45°S). We also observed a significant difference between sexes in δ13C (W= 25, p<0.05) but not in δ15N values (W= 53, p>0.05), with females also having larger isotopic foraging niche widths (SEAb) relative to males. Differences in the spatial distribution and isotopic values between sexes likely reflect a pattern of niche partitioning during the non-breeding period. These results provide insights into mechanisms that may reduce intraspecific competition and can possibly inform sex-specific conservation strategies during the non-breeding period.Fil: Dodino, Samanta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Polito, Michael. Department Of Oceanography And Costal Sciencies; Estados UnidosFil: Pütz, Klemens. Antartic Research Trust; Alemania10th International Penguin ConferenceDunedinNueva ZelandaUniversity of OtagoUniversity of Otago2020info: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/11336/195385Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology; 10th International Penguin Conference; Dunedin; Nueva Zelanda; 2019; 37-37CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.penguin-conference.com/past-conferencesInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:05:50Zoai:ri.conicet.gov.ar:11336/195385instacron: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 13:05:50.903CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
title Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
spellingShingle Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
Dodino, Samanta Graciela
Magellanic penguin
isotopes
winter dispersal
geolocators
title_short Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
title_full Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
title_fullStr Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
title_full_unstemmed Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
title_sort Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology
dc.creator.none.fl_str_mv Dodino, Samanta Graciela
Raya Rey, Andrea Nélida
Riccialdelli, Luciana
Polito, Michael
Pütz, Klemens
author Dodino, Samanta Graciela
author_facet Dodino, Samanta Graciela
Raya Rey, Andrea Nélida
Riccialdelli, Luciana
Polito, Michael
Pütz, Klemens
author_role author
author2 Raya Rey, Andrea Nélida
Riccialdelli, Luciana
Polito, Michael
Pütz, Klemens
author2_role author
author
author
author
dc.subject.none.fl_str_mv Magellanic penguin
isotopes
winter dispersal
geolocators
topic Magellanic penguin
isotopes
winter dispersal
geolocators
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 dispersal of penguins during the non-breeding period is a critical period that can affect breeding success and survival in the following season. Thus, knowledge of penguin foraging ecology during this energy-intensive period is crucial to understand their responses to ecosystem variability. We recorded winter dispersal of Magellanic penguins Spheniscus magellanicus from Martillo Island (Beagle Channel, Argentina) using LAT2900 geolocators in 2017. We collected whole blood samples when the penguins first arrived at the colony in spring to study their pre-breeding foraging niche using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. In total, 26 adults were equipped after their annual molt, of which 24 were re-captured. However, only 20 were still equipped with devices and only 9 datasets could be recovered successfully. We found that penguins dispersed north along the Patagonian coast up to just south of Buenos Aires, Argentina (<38°S). In addition, prior to their return to the breeding site (August-September), females were mainly concentrated in more southern waters (between 49° S to 55°S) relative to males (between 41°S to 45°S). We also observed a significant difference between sexes in δ13C (W= 25, p<0.05) but not in δ15N values (W= 53, p>0.05), with females also having larger isotopic foraging niche widths (SEAb) relative to males. Differences in the spatial distribution and isotopic values between sexes likely reflect a pattern of niche partitioning during the non-breeding period. These results provide insights into mechanisms that may reduce intraspecific competition and can possibly inform sex-specific conservation strategies during the non-breeding period.
Fil: Dodino, Samanta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Polito, Michael. Department Of Oceanography And Costal Sciencies; Estados Unidos
Fil: Pütz, Klemens. Antartic Research Trust; Alemania
10th International Penguin Conference
Dunedin
Nueva Zelanda
University of Otago
description The dispersal of penguins during the non-breeding period is a critical period that can affect breeding success and survival in the following season. Thus, knowledge of penguin foraging ecology during this energy-intensive period is crucial to understand their responses to ecosystem variability. We recorded winter dispersal of Magellanic penguins Spheniscus magellanicus from Martillo Island (Beagle Channel, Argentina) using LAT2900 geolocators in 2017. We collected whole blood samples when the penguins first arrived at the colony in spring to study their pre-breeding foraging niche using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. In total, 26 adults were equipped after their annual molt, of which 24 were re-captured. However, only 20 were still equipped with devices and only 9 datasets could be recovered successfully. We found that penguins dispersed north along the Patagonian coast up to just south of Buenos Aires, Argentina (<38°S). In addition, prior to their return to the breeding site (August-September), females were mainly concentrated in more southern waters (between 49° S to 55°S) relative to males (between 41°S to 45°S). We also observed a significant difference between sexes in δ13C (W= 25, p<0.05) but not in δ15N values (W= 53, p>0.05), with females also having larger isotopic foraging niche widths (SEAb) relative to males. Differences in the spatial distribution and isotopic values between sexes likely reflect a pattern of niche partitioning during the non-breeding period. These results provide insights into mechanisms that may reduce intraspecific competition and can possibly inform sex-specific conservation strategies during the non-breeding period.
publishDate 2020
dc.date.none.fl_str_mv 2020
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/11336/195385
Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology; 10th International Penguin Conference; Dunedin; Nueva Zelanda; 2019; 37-37
CONICET Digital
CONICET
url http://hdl.handle.net/11336/195385
identifier_str_mv Winter dispersal of Magellanic penguins at Martillo Island: Sexual differences in movement patterns and trophic ecology; 10th International Penguin Conference; Dunedin; Nueva Zelanda; 2019; 37-37
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/past-conferences
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 University of Otago
publisher.none.fl_str_mv University of Otago
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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