Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes

Autores
Haro, Daniela; Riccialdelli, Luciana; Acevedo, Jorge; Aguayo Lobo, Anelio; Montiel, Americo
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The contribution of prey species to the diet and their variation over time are poorly understood processes in the trophic ecology of Southeast Pacific humpback whales (Megaptera novaeangliae). The purpose of this study was to use carbon and nitrogen stable isotopes to provide insights into the trophic ecology and to determine the inter-annual variation of the diet of the humpback whales inthe Magellan Strait. During 2011 and 2012, an analysis was carried out to determine the isotopic composition of humpback whale skin. We used a Bayesian isotope mixing model to determine the relative contribution of prey species to the isotopic value of the consumer. The humpback whale had mean values of -16.3 ± 0.6? in δ13C and 14.7 ± 1.0? in δ15N (n = 33). The δ13C and δ15N in both the whales and the Fuegian sprat (Sprattus fueguensis) were significantly higher in 2011 compared to 2012. Additionally, females had significantly higher δ15N values in 2012; however, mean δ13C and δ15N values of whales within each seasonand between age classes did not differ statistically. A variation was observed in the contribution of different prey to the whale diet between the studyyears, with Fuegian sprat as the predominant prey during 2011 (mean 55 ± 12%), and crustaceans dominating the diet in 2012 (mean 82 ± 9%). This study confirms the diet of the humpback whale within the Magellan Strait. Furthermore, isotopicanalyses suggest important inter-annual changes due to (1) changes in the proportion of the species being consumed, probably due to variations in availability (e.g., abundance) of prey; and/or (2) annual isotopic changes at the base of the food web. Further studies are required on the populationdynamics of prey in order to monitor annual changes in abundance and food supply.
Fil: Haro, Daniela. Asociación de Investigadores del Museo Historia Natural Río Seco; Chile. Universidad de Chile; Chile
Fil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Acevedo, Jorge. Fundación CEQUA; Chile
Fil: Aguayo Lobo, Anelio. Asociación de Investigadores del Museo Historia Natural Río Seco; Chile. Universidad de Magallanes; Chile. Instituto Antártico Chileno; Chile
Fil: Montiel, Americo. Universidad de Magallanes; Chile
Materia
SOUTHEAST PACIFIC HUMPBACK WHALE
MEGAPTERA NOVAEANGLIAE
DIET
FRANCISCO COLOANE COASTAL MARINE PROTECTED AREA
FUEGIAN SPRAT
SPRATTUS FUEGENSIS
LOBSTER KRILL
MUNIDA GREGARIA
KRILL
EUPHAUSIA LUCENS
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:11336/94709
Acceder
id CONICETDig_577276484c0b576cfb52328b1ea2512c
oai_identifier_str oai:ri.conicet.gov.ar:11336/94709
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopesHaro, DanielaRiccialdelli, LucianaAcevedo, JorgeAguayo Lobo, AnelioMontiel, AmericoSOUTHEAST PACIFIC HUMPBACK WHALEMEGAPTERA NOVAEANGLIAEDIETFRANCISCO COLOANE COASTAL MARINE PROTECTED AREAFUEGIAN SPRATSPRATTUS FUEGENSISLOBSTER KRILLMUNIDA GREGARIAKRILLEUPHAUSIA LUCENShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The contribution of prey species to the diet and their variation over time are poorly understood processes in the trophic ecology of Southeast Pacific humpback whales (Megaptera novaeangliae). The purpose of this study was to use carbon and nitrogen stable isotopes to provide insights into the trophic ecology and to determine the inter-annual variation of the diet of the humpback whales inthe Magellan Strait. During 2011 and 2012, an analysis was carried out to determine the isotopic composition of humpback whale skin. We used a Bayesian isotope mixing model to determine the relative contribution of prey species to the isotopic value of the consumer. The humpback whale had mean values of -16.3 ± 0.6? in δ13C and 14.7 ± 1.0? in δ15N (n = 33). The δ13C and δ15N in both the whales and the Fuegian sprat (Sprattus fueguensis) were significantly higher in 2011 compared to 2012. Additionally, females had significantly higher δ15N values in 2012; however, mean δ13C and δ15N values of whales within each seasonand between age classes did not differ statistically. A variation was observed in the contribution of different prey to the whale diet between the studyyears, with Fuegian sprat as the predominant prey during 2011 (mean 55 ± 12%), and crustaceans dominating the diet in 2012 (mean 82 ± 9%). This study confirms the diet of the humpback whale within the Magellan Strait. Furthermore, isotopicanalyses suggest important inter-annual changes due to (1) changes in the proportion of the species being consumed, probably due to variations in availability (e.g., abundance) of prey; and/or (2) annual isotopic changes at the base of the food web. Further studies are required on the populationdynamics of prey in order to monitor annual changes in abundance and food supply.Fil: Haro, Daniela. Asociación de Investigadores del Museo Historia Natural Río Seco; Chile. Universidad de Chile; ChileFil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Acevedo, Jorge. Fundación CEQUA; ChileFil: Aguayo Lobo, Anelio. Asociación de Investigadores del Museo Historia Natural Río Seco; Chile. Universidad de Magallanes; Chile. Instituto Antártico Chileno; ChileFil: Montiel, Americo. Universidad de Magallanes; ChileEuropean Association for Aquatic Mammals2016-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94709Haro, Daniela; Riccialdelli, Luciana; Acevedo, Jorge; Aguayo Lobo, Anelio; Montiel, Americo; Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes; European Association for Aquatic Mammals; Aquatic Mammals; 42; 2; 4-2016; 233-2440167-5427CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=1420:trophic-ecology-of-humpback-whales-megaptera-novaeangliae-in-the-magellan-strait-as-indicated-by-carbon-and-nitrogen-stable-isotopes&catid=148&Itemid=157info:eu-repo/semantics/altIdentifier/doi/10.1578/AM.42.2.2016.xxxinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:12:51Zoai:ri.conicet.gov.ar:11336/94709instacron: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 11:12:51.619CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
title Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
spellingShingle Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
Haro, Daniela
SOUTHEAST PACIFIC HUMPBACK WHALE
MEGAPTERA NOVAEANGLIAE
DIET
FRANCISCO COLOANE COASTAL MARINE PROTECTED AREA
FUEGIAN SPRAT
SPRATTUS FUEGENSIS
LOBSTER KRILL
MUNIDA GREGARIA
KRILL
EUPHAUSIA LUCENS
title_short Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
title_full Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
title_fullStr Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
title_full_unstemmed Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
title_sort Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes
dc.creator.none.fl_str_mv Haro, Daniela
Riccialdelli, Luciana
Acevedo, Jorge
Aguayo Lobo, Anelio
Montiel, Americo
author Haro, Daniela
author_facet Haro, Daniela
Riccialdelli, Luciana
Acevedo, Jorge
Aguayo Lobo, Anelio
Montiel, Americo
author_role author
author2 Riccialdelli, Luciana
Acevedo, Jorge
Aguayo Lobo, Anelio
Montiel, Americo
author2_role author
author
author
author
dc.subject.none.fl_str_mv SOUTHEAST PACIFIC HUMPBACK WHALE
MEGAPTERA NOVAEANGLIAE
DIET
FRANCISCO COLOANE COASTAL MARINE PROTECTED AREA
FUEGIAN SPRAT
SPRATTUS FUEGENSIS
LOBSTER KRILL
MUNIDA GREGARIA
KRILL
EUPHAUSIA LUCENS
topic SOUTHEAST PACIFIC HUMPBACK WHALE
MEGAPTERA NOVAEANGLIAE
DIET
FRANCISCO COLOANE COASTAL MARINE PROTECTED AREA
FUEGIAN SPRAT
SPRATTUS FUEGENSIS
LOBSTER KRILL
MUNIDA GREGARIA
KRILL
EUPHAUSIA LUCENS
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 contribution of prey species to the diet and their variation over time are poorly understood processes in the trophic ecology of Southeast Pacific humpback whales (Megaptera novaeangliae). The purpose of this study was to use carbon and nitrogen stable isotopes to provide insights into the trophic ecology and to determine the inter-annual variation of the diet of the humpback whales inthe Magellan Strait. During 2011 and 2012, an analysis was carried out to determine the isotopic composition of humpback whale skin. We used a Bayesian isotope mixing model to determine the relative contribution of prey species to the isotopic value of the consumer. The humpback whale had mean values of -16.3 ± 0.6? in δ13C and 14.7 ± 1.0? in δ15N (n = 33). The δ13C and δ15N in both the whales and the Fuegian sprat (Sprattus fueguensis) were significantly higher in 2011 compared to 2012. Additionally, females had significantly higher δ15N values in 2012; however, mean δ13C and δ15N values of whales within each seasonand between age classes did not differ statistically. A variation was observed in the contribution of different prey to the whale diet between the studyyears, with Fuegian sprat as the predominant prey during 2011 (mean 55 ± 12%), and crustaceans dominating the diet in 2012 (mean 82 ± 9%). This study confirms the diet of the humpback whale within the Magellan Strait. Furthermore, isotopicanalyses suggest important inter-annual changes due to (1) changes in the proportion of the species being consumed, probably due to variations in availability (e.g., abundance) of prey; and/or (2) annual isotopic changes at the base of the food web. Further studies are required on the populationdynamics of prey in order to monitor annual changes in abundance and food supply.
Fil: Haro, Daniela. Asociación de Investigadores del Museo Historia Natural Río Seco; Chile. Universidad de Chile; Chile
Fil: Riccialdelli, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Acevedo, Jorge. Fundación CEQUA; Chile
Fil: Aguayo Lobo, Anelio. Asociación de Investigadores del Museo Historia Natural Río Seco; Chile. Universidad de Magallanes; Chile. Instituto Antártico Chileno; Chile
Fil: Montiel, Americo. Universidad de Magallanes; Chile
description The contribution of prey species to the diet and their variation over time are poorly understood processes in the trophic ecology of Southeast Pacific humpback whales (Megaptera novaeangliae). The purpose of this study was to use carbon and nitrogen stable isotopes to provide insights into the trophic ecology and to determine the inter-annual variation of the diet of the humpback whales inthe Magellan Strait. During 2011 and 2012, an analysis was carried out to determine the isotopic composition of humpback whale skin. We used a Bayesian isotope mixing model to determine the relative contribution of prey species to the isotopic value of the consumer. The humpback whale had mean values of -16.3 ± 0.6? in δ13C and 14.7 ± 1.0? in δ15N (n = 33). The δ13C and δ15N in both the whales and the Fuegian sprat (Sprattus fueguensis) were significantly higher in 2011 compared to 2012. Additionally, females had significantly higher δ15N values in 2012; however, mean δ13C and δ15N values of whales within each seasonand between age classes did not differ statistically. A variation was observed in the contribution of different prey to the whale diet between the studyyears, with Fuegian sprat as the predominant prey during 2011 (mean 55 ± 12%), and crustaceans dominating the diet in 2012 (mean 82 ± 9%). This study confirms the diet of the humpback whale within the Magellan Strait. Furthermore, isotopicanalyses suggest important inter-annual changes due to (1) changes in the proportion of the species being consumed, probably due to variations in availability (e.g., abundance) of prey; and/or (2) annual isotopic changes at the base of the food web. Further studies are required on the populationdynamics of prey in order to monitor annual changes in abundance and food supply.
publishDate 2016
dc.date.none.fl_str_mv 2016-04
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/11336/94709
Haro, Daniela; Riccialdelli, Luciana; Acevedo, Jorge; Aguayo Lobo, Anelio; Montiel, Americo; Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes; European Association for Aquatic Mammals; Aquatic Mammals; 42; 2; 4-2016; 233-244
0167-5427
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94709
identifier_str_mv Haro, Daniela; Riccialdelli, Luciana; Acevedo, Jorge; Aguayo Lobo, Anelio; Montiel, Americo; Trophic ecology of humpback whales (Megaptera novaeangliae) in the Magellan Strait as indicated by carbon and nitrogen stable isotopes; European Association for Aquatic Mammals; Aquatic Mammals; 42; 2; 4-2016; 233-244
0167-5427
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.aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=1420:trophic-ecology-of-humpback-whales-megaptera-novaeangliae-in-the-magellan-strait-as-indicated-by-carbon-and-nitrogen-stable-isotopes&catid=148&Itemid=157
info:eu-repo/semantics/altIdentifier/doi/10.1578/AM.42.2.2016.xxx
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 European Association for Aquatic Mammals
publisher.none.fl_str_mv European Association for Aquatic Mammals
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 12.982451

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