Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds
Understanding sex differences in foraging behaviour has important implications for breeding biology and population ecology. This requires the evaluation of segregation throughout the annual cycle, including the non-breeding period. We studied the diet and foraging strategies of the Common Tern (Ster...
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ftconicet:oai:ri.conicet.gov.ar:11336/122242 2023-10-09T21:50:48+02:00 Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds Lamacchia, Paola Madrid, Enrique Alberto Mariano y Jelicich, Rocío application/pdf http://hdl.handle.net/11336/122242 eng eng Csiro Publishing info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/01584197.2019.1580536 info:eu-repo/semantics/altIdentifier/doi/10.1080/01584197.2019.1580536 http://hdl.handle.net/11336/122242 Lamacchia, Paola; Madrid, Enrique Alberto; Mariano y Jelicich, Rocío; Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds; Csiro Publishing; Emu; 119; 2; 4-2019; 176-185 0158-4197 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Stable isotopes isotopic niche non-breeding period sexual segregation feeding ecology terns https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1080/01584197.2019.1580536 2023-09-24T18:33:18Z Understanding sex differences in foraging behaviour has important implications for breeding biology and population ecology. This requires the evaluation of segregation throughout the annual cycle, including the non-breeding period. We studied the diet and foraging strategies of the Common Tern (Sterna hirundo) at an intraspecific level by sampling birds during two consecutive non-breeding periods in Punta Rasa, Buenos Aires Province, Argentina. Blood samples were taken for sex determination and carbon and nitrogen stable isotope analysis. No isotopic difference was observed between years, but higher isotopic values occurred during late non-breeding period. Carbon and nitrogen isotopic values were similar between sexes; however, differences were observed in standard ellipse analyses, considered to represent isotopic niches. Even though the Bayesian ellipse areas overlapped, females showed wider isotopic niches throughout the non-breeding period. This could be related to different feeding strategies, foraging areas or migratory stopover sites at either intraspecific or individual levels. Diet contributions of different prey categories estimated through mixing model analyses suggested a higher contribution of estuarine fish than of marine pelagic species. These results highlight the importance of stable isotope analyses as a complementary methodology to traditional diet studies, particularly during the non-breeding period. Fil: Lamacchia, Paola. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Vertebrados; Argentina Fil: Madrid, Enrique Alberto. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Vertebrados; Argentina 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 ... Article in Journal/Newspaper Common tern Sterna hirundo CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Emu - Austral Ornithology 119 2 176 185 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
Stable isotopes isotopic niche non-breeding period sexual segregation feeding ecology terns https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Stable isotopes isotopic niche non-breeding period sexual segregation feeding ecology terns https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Lamacchia, Paola Madrid, Enrique Alberto Mariano y Jelicich, Rocío Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds |
topic_facet |
Stable isotopes isotopic niche non-breeding period sexual segregation feeding ecology terns https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Understanding sex differences in foraging behaviour has important implications for breeding biology and population ecology. This requires the evaluation of segregation throughout the annual cycle, including the non-breeding period. We studied the diet and foraging strategies of the Common Tern (Sterna hirundo) at an intraspecific level by sampling birds during two consecutive non-breeding periods in Punta Rasa, Buenos Aires Province, Argentina. Blood samples were taken for sex determination and carbon and nitrogen stable isotope analysis. No isotopic difference was observed between years, but higher isotopic values occurred during late non-breeding period. Carbon and nitrogen isotopic values were similar between sexes; however, differences were observed in standard ellipse analyses, considered to represent isotopic niches. Even though the Bayesian ellipse areas overlapped, females showed wider isotopic niches throughout the non-breeding period. This could be related to different feeding strategies, foraging areas or migratory stopover sites at either intraspecific or individual levels. Diet contributions of different prey categories estimated through mixing model analyses suggested a higher contribution of estuarine fish than of marine pelagic species. These results highlight the importance of stable isotope analyses as a complementary methodology to traditional diet studies, particularly during the non-breeding period. Fil: Lamacchia, Paola. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Vertebrados; Argentina Fil: Madrid, Enrique Alberto. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Vertebrados; Argentina 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 ... |
format |
Article in Journal/Newspaper |
author |
Lamacchia, Paola Madrid, Enrique Alberto Mariano y Jelicich, Rocío |
author_facet |
Lamacchia, Paola Madrid, Enrique Alberto Mariano y Jelicich, Rocío |
author_sort |
Lamacchia, Paola |
title |
Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds |
title_short |
Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds |
title_full |
Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds |
title_fullStr |
Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds |
title_full_unstemmed |
Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds |
title_sort |
intraspecific variability in isotopic composition of a monomorphic seabird, the common tern ( sterna hirundo ), at wintering grounds |
publisher |
Csiro Publishing |
url |
http://hdl.handle.net/11336/122242 |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
Common tern Sterna hirundo |
genre_facet |
Common tern Sterna hirundo |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/01584197.2019.1580536 info:eu-repo/semantics/altIdentifier/doi/10.1080/01584197.2019.1580536 http://hdl.handle.net/11336/122242 Lamacchia, Paola; Madrid, Enrique Alberto; Mariano y Jelicich, Rocío; Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds; Csiro Publishing; Emu; 119; 2; 4-2019; 176-185 0158-4197 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1080/01584197.2019.1580536 |
container_title |
Emu - Austral Ornithology |
container_volume |
119 |
container_issue |
2 |
container_start_page |
176 |
op_container_end_page |
185 |
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1779313865196044288 |