A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage

Autores
Dodino Samanta; Riccialdelli, Luciana; Polito, MJ; Putz, Klemens; Brasso, Rebecca; Raya Rey, Andrea Nélida
Año de publicación
2020
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Penguins are good indicators of environmental changes and respond to oceanographicconditions within their foraging grounds. We studied adult and juvenile Magellanic penguin(Spheniscus magellanicus) trophic niches using stable carbon ( 13C) and nitrogen ( 15N) isotopesand determined their feather mercury (Hg) concentrations. We sampled feathers during the premolt stage from three colonies of Tierra del Fuego with different oceanographic conditions andpopulation sizes: Staten (1,000 pairs), Martillo (5,000 pairs) and Observatorio Islands (70,000 pairs).Adults had higher δ15N and δ13C values compared with juveniles for the three colonies (p< 0.05),and occupied a higher trophic position (TP) that was reflected in their higher Hg concentration.Adults did not differ in δ15N values, while δ13C values differed significantly only between FranklinBay on Staten Island and Martillo Island. We found significantly higher adult Hg concentration and awider isotopic niche in Observatorio Island compared with Franklin Island and Martillo Island,despite their similar TP. Meanwhile, juveniles from Martillo Island had significantly higher δ13C andδ15N values relative to the other colonies. Juveniles had similar TP but differed in Hg concentration,with the lowest Hg concentrations at Martillo Island and the highest at Observatorio Island. Theseresults suggest that foraging area differences among colonies may explain the observed patterns inHg concentration and isotopic niche more so than TP. This demonstrates the plasticity of thesepenguins according to the oceanographic variability in their preferred foraging grounds anddemography with positive implications in terms of conservation under a climate change scenario.
Fil: Dodino Samanta. 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, MJ. State University of Louisiana; Estados Unidos
Fil: Putz, Klemens. Antarctic Research Trust; Alemania
Fil: Brasso, Rebecca. Weber State University; Estados Unidos
Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
10th International Penguin Conference
Dunedin
Nueva Zelanda
Global Pinguin Society
Materia
Spheniscus magellanicus
MERCURY
d13C
d15N
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:11336/210157
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/210157
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stageDodino SamantaRiccialdelli, LucianaPolito, MJPutz, KlemensBrasso, RebeccaRaya Rey, Andrea NélidaSpheniscus magellanicusMERCURYd13Cd15Nhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Penguins are good indicators of environmental changes and respond to oceanographicconditions within their foraging grounds. We studied adult and juvenile Magellanic penguin(Spheniscus magellanicus) trophic niches using stable carbon ( 13C) and nitrogen ( 15N) isotopesand determined their feather mercury (Hg) concentrations. We sampled feathers during the premolt stage from three colonies of Tierra del Fuego with different oceanographic conditions andpopulation sizes: Staten (1,000 pairs), Martillo (5,000 pairs) and Observatorio Islands (70,000 pairs).Adults had higher δ15N and δ13C values compared with juveniles for the three colonies (p< 0.05),and occupied a higher trophic position (TP) that was reflected in their higher Hg concentration.Adults did not differ in δ15N values, while δ13C values differed significantly only between FranklinBay on Staten Island and Martillo Island. We found significantly higher adult Hg concentration and awider isotopic niche in Observatorio Island compared with Franklin Island and Martillo Island,despite their similar TP. Meanwhile, juveniles from Martillo Island had significantly higher δ13C andδ15N values relative to the other colonies. Juveniles had similar TP but differed in Hg concentration,with the lowest Hg concentrations at Martillo Island and the highest at Observatorio Island. Theseresults suggest that foraging area differences among colonies may explain the observed patterns inHg concentration and isotopic niche more so than TP. This demonstrates the plasticity of thesepenguins according to the oceanographic variability in their preferred foraging grounds anddemography with positive implications in terms of conservation under a climate change scenario.Fil: Dodino Samanta. 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, MJ. State University of Louisiana; Estados UnidosFil: Putz, Klemens. Antarctic Research Trust; AlemaniaFil: Brasso, Rebecca. Weber State University; Estados UnidosFil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina10th International Penguin ConferenceDunedinNueva ZelandaGlobal Pinguin SocietyGlobal Pinguin Society2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectConferenciaBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/210157A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage; 10th International Penguin Conference; Dunedin; Nueva Zelanda; 2019; 64-64CONICET 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 Técnicas2025-09-29T10:09:05Zoai:ri.conicet.gov.ar:11336/210157instacron: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 10:09:06.027CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
title A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
spellingShingle A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
Dodino Samanta
Spheniscus magellanicus
MERCURY
d13C
d15N
title_short A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
title_full A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
title_fullStr A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
title_full_unstemmed A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
title_sort A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage
dc.creator.none.fl_str_mv Dodino Samanta
Riccialdelli, Luciana
Polito, MJ
Putz, Klemens
Brasso, Rebecca
Raya Rey, Andrea Nélida
author Dodino Samanta
author_facet Dodino Samanta
Riccialdelli, Luciana
Polito, MJ
Putz, Klemens
Brasso, Rebecca
Raya Rey, Andrea Nélida
author_role author
author2 Riccialdelli, Luciana
Polito, MJ
Putz, Klemens
Brasso, Rebecca
Raya Rey, Andrea Nélida
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Spheniscus magellanicus
MERCURY
d13C
d15N
topic Spheniscus magellanicus
MERCURY
d13C
d15N
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Penguins are good indicators of environmental changes and respond to oceanographicconditions within their foraging grounds. We studied adult and juvenile Magellanic penguin(Spheniscus magellanicus) trophic niches using stable carbon ( 13C) and nitrogen ( 15N) isotopesand determined their feather mercury (Hg) concentrations. We sampled feathers during the premolt stage from three colonies of Tierra del Fuego with different oceanographic conditions andpopulation sizes: Staten (1,000 pairs), Martillo (5,000 pairs) and Observatorio Islands (70,000 pairs).Adults had higher δ15N and δ13C values compared with juveniles for the three colonies (p< 0.05),and occupied a higher trophic position (TP) that was reflected in their higher Hg concentration.Adults did not differ in δ15N values, while δ13C values differed significantly only between FranklinBay on Staten Island and Martillo Island. We found significantly higher adult Hg concentration and awider isotopic niche in Observatorio Island compared with Franklin Island and Martillo Island,despite their similar TP. Meanwhile, juveniles from Martillo Island had significantly higher δ13C andδ15N values relative to the other colonies. Juveniles had similar TP but differed in Hg concentration,with the lowest Hg concentrations at Martillo Island and the highest at Observatorio Island. Theseresults suggest that foraging area differences among colonies may explain the observed patterns inHg concentration and isotopic niche more so than TP. This demonstrates the plasticity of thesepenguins according to the oceanographic variability in their preferred foraging grounds anddemography with positive implications in terms of conservation under a climate change scenario.
Fil: Dodino Samanta. 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, MJ. State University of Louisiana; Estados Unidos
Fil: Putz, Klemens. Antarctic Research Trust; Alemania
Fil: Brasso, Rebecca. Weber State University; Estados Unidos
Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
10th International Penguin Conference
Dunedin
Nueva Zelanda
Global Pinguin Society
description Penguins are good indicators of environmental changes and respond to oceanographicconditions within their foraging grounds. We studied adult and juvenile Magellanic penguin(Spheniscus magellanicus) trophic niches using stable carbon ( 13C) and nitrogen ( 15N) isotopesand determined their feather mercury (Hg) concentrations. We sampled feathers during the premolt stage from three colonies of Tierra del Fuego with different oceanographic conditions andpopulation sizes: Staten (1,000 pairs), Martillo (5,000 pairs) and Observatorio Islands (70,000 pairs).Adults had higher δ15N and δ13C values compared with juveniles for the three colonies (p< 0.05),and occupied a higher trophic position (TP) that was reflected in their higher Hg concentration.Adults did not differ in δ15N values, while δ13C values differed significantly only between FranklinBay on Staten Island and Martillo Island. We found significantly higher adult Hg concentration and awider isotopic niche in Observatorio Island compared with Franklin Island and Martillo Island,despite their similar TP. Meanwhile, juveniles from Martillo Island had significantly higher δ13C andδ15N values relative to the other colonies. Juveniles had similar TP but differed in Hg concentration,with the lowest Hg concentrations at Martillo Island and the highest at Observatorio Island. Theseresults suggest that foraging area differences among colonies may explain the observed patterns inHg concentration and isotopic niche more so than TP. This demonstrates the plasticity of thesepenguins according to the oceanographic variability in their preferred foraging grounds anddemography with positive implications in terms of conservation under a climate change scenario.
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
Conferencia
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/11336/210157
A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage; 10th International Penguin Conference; Dunedin; Nueva Zelanda; 2019; 64-64
CONICET Digital
CONICET
url http://hdl.handle.net/11336/210157
identifier_str_mv A tale of three “cities”: Variations by site and ages in isotopic composition and mercury concentrations of Magellanic penguin during the pre-molt stage; 10th International Penguin Conference; Dunedin; Nueva Zelanda; 2019; 64-64
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
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Global Pinguin Society
publisher.none.fl_str_mv Global Pinguin Society
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 13.070432

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