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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/94709
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oai:ri.conicet.gov.ar:11336/94709 |
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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 Técnicas2025-09-29T09:44:06Zoai: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:34982025-09-29 09:44:06.985CONICET 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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1844613388808749056 |
score |
13.070432 |