Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach

Autores
Mariano y Jelicich, Rocío; Copello, Sofía; Seco Pon, Juan Pablo; Favero, Marco
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Ecological changes due to fishing activities appear to be similar across marine ecosystems; in this context the application of retrospective studies could help understand the magnitude of such impact on apex predators. Carbon and nitrogen stable isotopic values of feathers were used to evaluate if the observed expansion in Argentine fisheries operating in the Patagonian Continental Shelf affected Black-browed albatrosses (BBAs) diet. Feather samples from museum skins and from contemporary birds captured at sea were compared. Samples from the “pre-expansion” period showed enriched carbon values compared to recent samples. No differences in δ15N were observed between periods, suggesting that if a diet change occurred it did not affect trophic levels exploited by BBAs. Isotopic niche width of contemporary BBAs was wider than the one for historic albatrosses suggesting, for the former, a more variable diet. Given that cephalopods from the Patagonian Continental Shelf showed enriched carbon values compared to pelagic and demersal prey, our results suggest a trend from a cephalopod-based diet during the pre-fisheries expansion period towards a demersal prey-based diet in a contemporary fishing context. Despite the limitations imposed by retrospective studies, our results show that a shift in the diet of the Black-browed albatross in waters of the Patagonian Continental Shelf could have occurred as a result of ecosystem changes promoted by the expansion of industrial fisheries and mostly through the emergence of discards as an abundant and predictable food source.
Fil: Mariano y Jelicich, Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Copello, Sofía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Materia
Black-Browed Albatross
Diet
Fisheries Expansion
Isotopic Approach
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:11336/64778
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approachMariano y Jelicich, RocíoCopello, SofíaSeco Pon, Juan PabloFavero, MarcoBlack-Browed AlbatrossDietFisheries ExpansionIsotopic Approachhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Ecological changes due to fishing activities appear to be similar across marine ecosystems; in this context the application of retrospective studies could help understand the magnitude of such impact on apex predators. Carbon and nitrogen stable isotopic values of feathers were used to evaluate if the observed expansion in Argentine fisheries operating in the Patagonian Continental Shelf affected Black-browed albatrosses (BBAs) diet. Feather samples from museum skins and from contemporary birds captured at sea were compared. Samples from the “pre-expansion” period showed enriched carbon values compared to recent samples. No differences in δ15N were observed between periods, suggesting that if a diet change occurred it did not affect trophic levels exploited by BBAs. Isotopic niche width of contemporary BBAs was wider than the one for historic albatrosses suggesting, for the former, a more variable diet. Given that cephalopods from the Patagonian Continental Shelf showed enriched carbon values compared to pelagic and demersal prey, our results suggest a trend from a cephalopod-based diet during the pre-fisheries expansion period towards a demersal prey-based diet in a contemporary fishing context. Despite the limitations imposed by retrospective studies, our results show that a shift in the diet of the Black-browed albatross in waters of the Patagonian Continental Shelf could have occurred as a result of ecosystem changes promoted by the expansion of industrial fisheries and mostly through the emergence of discards as an abundant and predictable food source.Fil: Mariano y Jelicich, Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Copello, Sofía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaSpringer2017-06-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/64778Mariano y Jelicich, Rocío; Copello, Sofía; Seco Pon, Juan Pablo; Favero, Marco; Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach; Springer; Marine Biology; 164; 6; 13-6-2017; 148-1480025-31621432-1793CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00227-017-3176-zinfo:eu-repo/semantics/altIdentifier/doi/10.1007/s00227-017-3176-zinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:04:12Zoai:ri.conicet.gov.ar:11336/64778instacron: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 11:04:12.716CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
title Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
spellingShingle Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
Mariano y Jelicich, Rocío
Black-Browed Albatross
Diet
Fisheries Expansion
Isotopic Approach
title_short Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
title_full Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
title_fullStr Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
title_full_unstemmed Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
title_sort Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach
dc.creator.none.fl_str_mv Mariano y Jelicich, Rocío
Copello, Sofía
Seco Pon, Juan Pablo
Favero, Marco
author Mariano y Jelicich, Rocío
author_facet Mariano y Jelicich, Rocío
Copello, Sofía
Seco Pon, Juan Pablo
Favero, Marco
author_role author
author2 Copello, Sofía
Seco Pon, Juan Pablo
Favero, Marco
author2_role author
author
author
dc.subject.none.fl_str_mv Black-Browed Albatross
Diet
Fisheries Expansion
Isotopic Approach
topic Black-Browed Albatross
Diet
Fisheries Expansion
Isotopic Approach
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Ecological changes due to fishing activities appear to be similar across marine ecosystems; in this context the application of retrospective studies could help understand the magnitude of such impact on apex predators. Carbon and nitrogen stable isotopic values of feathers were used to evaluate if the observed expansion in Argentine fisheries operating in the Patagonian Continental Shelf affected Black-browed albatrosses (BBAs) diet. Feather samples from museum skins and from contemporary birds captured at sea were compared. Samples from the “pre-expansion” period showed enriched carbon values compared to recent samples. No differences in δ15N were observed between periods, suggesting that if a diet change occurred it did not affect trophic levels exploited by BBAs. Isotopic niche width of contemporary BBAs was wider than the one for historic albatrosses suggesting, for the former, a more variable diet. Given that cephalopods from the Patagonian Continental Shelf showed enriched carbon values compared to pelagic and demersal prey, our results suggest a trend from a cephalopod-based diet during the pre-fisheries expansion period towards a demersal prey-based diet in a contemporary fishing context. Despite the limitations imposed by retrospective studies, our results show that a shift in the diet of the Black-browed albatross in waters of the Patagonian Continental Shelf could have occurred as a result of ecosystem changes promoted by the expansion of industrial fisheries and mostly through the emergence of discards as an abundant and predictable food source.
Fil: Mariano y Jelicich, Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Copello, Sofía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Seco Pon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Favero, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
description Ecological changes due to fishing activities appear to be similar across marine ecosystems; in this context the application of retrospective studies could help understand the magnitude of such impact on apex predators. Carbon and nitrogen stable isotopic values of feathers were used to evaluate if the observed expansion in Argentine fisheries operating in the Patagonian Continental Shelf affected Black-browed albatrosses (BBAs) diet. Feather samples from museum skins and from contemporary birds captured at sea were compared. Samples from the “pre-expansion” period showed enriched carbon values compared to recent samples. No differences in δ15N were observed between periods, suggesting that if a diet change occurred it did not affect trophic levels exploited by BBAs. Isotopic niche width of contemporary BBAs was wider than the one for historic albatrosses suggesting, for the former, a more variable diet. Given that cephalopods from the Patagonian Continental Shelf showed enriched carbon values compared to pelagic and demersal prey, our results suggest a trend from a cephalopod-based diet during the pre-fisheries expansion period towards a demersal prey-based diet in a contemporary fishing context. Despite the limitations imposed by retrospective studies, our results show that a shift in the diet of the Black-browed albatross in waters of the Patagonian Continental Shelf could have occurred as a result of ecosystem changes promoted by the expansion of industrial fisheries and mostly through the emergence of discards as an abundant and predictable food source.
publishDate 2017
dc.date.none.fl_str_mv 2017-06-13
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/11336/64778
Mariano y Jelicich, Rocío; Copello, Sofía; Seco Pon, Juan Pablo; Favero, Marco; Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach; Springer; Marine Biology; 164; 6; 13-6-2017; 148-148
0025-3162
1432-1793
CONICET Digital
CONICET
url http://hdl.handle.net/11336/64778
identifier_str_mv Mariano y Jelicich, Rocío; Copello, Sofía; Seco Pon, Juan Pablo; Favero, Marco; Long-term changes in Black-browed albatrosses diet as a result of fisheries expansion: an isotopic approach; Springer; Marine Biology; 164; 6; 13-6-2017; 148-148
0025-3162
1432-1793
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://link.springer.com/article/10.1007/s00227-017-3176-z
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00227-017-3176-z
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
application/pdf
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dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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