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dc.contributor.author
Bustos, Raimundo Lucas
dc.contributor.author
Daneri, Gustavo Adolfo
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Varela, Esperanza Amalia
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Harrington, Ana
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Volpedo, Alejandra
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Ceia, Felipe Rafael
dc.contributor.author
Xavier, José Carlos
dc.date.available
2021-12-01T17:24:08Z
dc.date.issued
2019-06
dc.identifier.citation
Bustos, Raimundo Lucas; Daneri, Gustavo Adolfo; Varela, Esperanza Amalia; Harrington, Ana; Volpedo, Alejandra; et al.; South American sea lions Otaria byronia as biological samplers of local cephalopod fauna in the Patagonian shelf marine ecosystem; Cambridge University Press; Journal of the Marine Biological Association of the United Kingdom; 99; 6; 6-2019; 1459-1463
dc.identifier.issn
0025-3154
dc.identifier.uri
http://hdl.handle.net/11336/147879
dc.description.abstract
Cephalopods are important prey in the diet of top predators, such as marine mammals and seabirds. However, detailed information on their trophic relationships in the Patagonian marine ecosystem is scarce, including those cephalopod species with commercial interest. The aims of this study were to evaluate the composition of the cephalopod component in the diet of Otaria byronia and determine the habitat use and trophic levels of their main cephalopod prey by measuring the stable isotopic signature of cephalopod beaks. Between May 2005 and February 2009, fresh faecal samples were collected from two sea lions rookeries in San Matias Gulf. Cephalopods occurred in 39.4% of the 1112 samples collected during the whole period of study. The dominant prey species was Octopus tehuelchus, which occurred in 45.8% of scats containing cephalopod remains, and represented 58.7% in terms of numerical abundance and 52.0% in mass of cephalopods consumed. The second species most consumed was the myopsid Doryteuthis gahi. The significant higher δ15N values of O. tehuelchus beaks in comparison with those of D. gahi showed that these two species have different trophic levels while occupying similar habitat (δ13C values) in neritic waters of the Patagonian shelf.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Cambridge University Press
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
OCTOPUS
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PATAGONIAN MARINE ECOSYSTEM
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PREY
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SQUIDS
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STABLE ISOTOPES
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Biología Marina, Limnología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
South American sea lions Otaria byronia as biological samplers of local cephalopod fauna in the Patagonian shelf marine ecosystem
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-19T21:49:10Z
dc.identifier.eissn
1469-7769
dc.journal.volume
99
dc.journal.number
6
dc.journal.pagination
1459-1463
dc.journal.pais
Reino Unido
dc.journal.ciudad
Cambridge
dc.description.fil
Fil: Bustos, Raimundo Lucas. Administración de Parques Nacionales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Daneri, Gustavo Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Varela, Esperanza Amalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Harrington, Ana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Volpedo, Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Unidad Ejecutora de Investigaciones en Producción Animal. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Unidad Ejecutora de Investigaciones en Producción Animal; Argentina
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Fil: Ceia, Felipe Rafael. Universidad de Coimbra; Portugal
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Fil: Xavier, José Carlos. Universidad de Coimbra; Portugal
dc.journal.title
Journal of the Marine Biological Association of the United Kingdom
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1017/S0025315419000432
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/abs/south-american-sea-lions-otaria-byronia-as-biological-samplers-of-local-cephalopod-fauna-in-the-patagonian-shelf-marine-ecosystem/7C223FE19F38F1B5FF117713874B7696
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