The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?

Autores
Casaux, Ricardo Jorge; Bertolin, María Lila; Tartara, Maria Alejandra; Alarcón, Pablo Angel Eduardo; Porro, Gerardo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Imperial Shag Phalacrocorax atriceps is widely distributed along the coast of South America and in Malvinas/Falkland Islands(Orta 1992). This shag is marine in most its range and forages predominantly on fish, although invertebrates were frequently reported as present in the diet(e.g., Punta etal. 2003, Ferrari et al. 2004, Bulgarella et al.2008)Reynolds (1934) reported the presence of the Imperial Shag breeding at Yehuin Lake,Tierra del Fuego, and later on Pereyra (1945, quoted in Navas 1970), Chebez & Gómez (1988) and Rasmussen et al. (1992) reported the existence of the only other three populations of this shag breeding in freshwater environments,the Nahuel Huapi (NHL),Fagnano, and Vintter lakes, respectively. Despite the potential interest in studying these populations, few studies provided information on the biology of this shag species. Although not globally threatened, the Imperial Shag at NHL is locally endangered and between the summers of 1990 (Rasmussen et.al. 1993) and 2005 (Pastore et al. 2005)the total number of individuals decreased in 68%. Thus,the aim of this study is provide the first information on the diet of the Imperial Shag breeding at NHL to improve the knowledge of the foraging behavior of this species as well as to explore the linkage between diet composition and the reported declining trend of this population.
Fil: Casaux, Ricardo Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Bertolin, María Lila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
Fil: Tartara, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Alarcón, Pablo Angel Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue; Argentina
Fil: Porro, Gerardo. Administración de Parques Nacionales; Argentina
Materia
Imperial Shag
Phalacrocorax atriceps
Breeding diet
Crustaceans
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:11336/257827
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?Casaux, Ricardo JorgeBertolin, María LilaTartara, Maria AlejandraAlarcón, Pablo Angel EduardoPorro, GerardoImperial ShagPhalacrocorax atricepsBreeding dietCrustaceanshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The Imperial Shag Phalacrocorax atriceps is widely distributed along the coast of South America and in Malvinas/Falkland Islands(Orta 1992). This shag is marine in most its range and forages predominantly on fish, although invertebrates were frequently reported as present in the diet(e.g., Punta etal. 2003, Ferrari et al. 2004, Bulgarella et al.2008)Reynolds (1934) reported the presence of the Imperial Shag breeding at Yehuin Lake,Tierra del Fuego, and later on Pereyra (1945, quoted in Navas 1970), Chebez & Gómez (1988) and Rasmussen et al. (1992) reported the existence of the only other three populations of this shag breeding in freshwater environments,the Nahuel Huapi (NHL),Fagnano, and Vintter lakes, respectively. Despite the potential interest in studying these populations, few studies provided information on the biology of this shag species. Although not globally threatened, the Imperial Shag at NHL is locally endangered and between the summers of 1990 (Rasmussen et.al. 1993) and 2005 (Pastore et al. 2005)the total number of individuals decreased in 68%. Thus,the aim of this study is provide the first information on the diet of the Imperial Shag breeding at NHL to improve the knowledge of the foraging behavior of this species as well as to explore the linkage between diet composition and the reported declining trend of this population.Fil: Casaux, Ricardo Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Bertolin, María Lila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; ArgentinaFil: Tartara, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Alarcón, Pablo Angel Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue; ArgentinaFil: Porro, Gerardo. Administración de Parques Nacionales; ArgentinaNeotropical Ornithological Society2010-09info: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/11336/257827Casaux, Ricardo Jorge; Bertolin, María Lila; Tartara, Maria Alejandra; Alarcón, Pablo Angel Eduardo; Porro, Gerardo; The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?; Neotropical Ornithological Society; Ornitología Neotropical; 21; 3; 9-2010; 457-1621075-4377CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://digitalcommons.usf.edu/ornitologia_neotropical/vol21/iss3/14/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:53:32Zoai:ri.conicet.gov.ar:11336/257827instacron: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:34982025-09-03 09:53:33.081CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
title The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
spellingShingle The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
Casaux, Ricardo Jorge
Imperial Shag
Phalacrocorax atriceps
Breeding diet
Crustaceans
title_short The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
title_full The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
title_fullStr The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
title_full_unstemmed The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
title_sort The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?
dc.creator.none.fl_str_mv Casaux, Ricardo Jorge
Bertolin, María Lila
Tartara, Maria Alejandra
Alarcón, Pablo Angel Eduardo
Porro, Gerardo
author Casaux, Ricardo Jorge
author_facet Casaux, Ricardo Jorge
Bertolin, María Lila
Tartara, Maria Alejandra
Alarcón, Pablo Angel Eduardo
Porro, Gerardo
author_role author
author2 Bertolin, María Lila
Tartara, Maria Alejandra
Alarcón, Pablo Angel Eduardo
Porro, Gerardo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Imperial Shag
Phalacrocorax atriceps
Breeding diet
Crustaceans
topic Imperial Shag
Phalacrocorax atriceps
Breeding diet
Crustaceans
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 Imperial Shag Phalacrocorax atriceps is widely distributed along the coast of South America and in Malvinas/Falkland Islands(Orta 1992). This shag is marine in most its range and forages predominantly on fish, although invertebrates were frequently reported as present in the diet(e.g., Punta etal. 2003, Ferrari et al. 2004, Bulgarella et al.2008)Reynolds (1934) reported the presence of the Imperial Shag breeding at Yehuin Lake,Tierra del Fuego, and later on Pereyra (1945, quoted in Navas 1970), Chebez & Gómez (1988) and Rasmussen et al. (1992) reported the existence of the only other three populations of this shag breeding in freshwater environments,the Nahuel Huapi (NHL),Fagnano, and Vintter lakes, respectively. Despite the potential interest in studying these populations, few studies provided information on the biology of this shag species. Although not globally threatened, the Imperial Shag at NHL is locally endangered and between the summers of 1990 (Rasmussen et.al. 1993) and 2005 (Pastore et al. 2005)the total number of individuals decreased in 68%. Thus,the aim of this study is provide the first information on the diet of the Imperial Shag breeding at NHL to improve the knowledge of the foraging behavior of this species as well as to explore the linkage between diet composition and the reported declining trend of this population.
Fil: Casaux, Ricardo Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Bertolin, María Lila. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
Fil: Tartara, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Alarcón, Pablo Angel Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue; Argentina
Fil: Porro, Gerardo. Administración de Parques Nacionales; Argentina
description The Imperial Shag Phalacrocorax atriceps is widely distributed along the coast of South America and in Malvinas/Falkland Islands(Orta 1992). This shag is marine in most its range and forages predominantly on fish, although invertebrates were frequently reported as present in the diet(e.g., Punta etal. 2003, Ferrari et al. 2004, Bulgarella et al.2008)Reynolds (1934) reported the presence of the Imperial Shag breeding at Yehuin Lake,Tierra del Fuego, and later on Pereyra (1945, quoted in Navas 1970), Chebez & Gómez (1988) and Rasmussen et al. (1992) reported the existence of the only other three populations of this shag breeding in freshwater environments,the Nahuel Huapi (NHL),Fagnano, and Vintter lakes, respectively. Despite the potential interest in studying these populations, few studies provided information on the biology of this shag species. Although not globally threatened, the Imperial Shag at NHL is locally endangered and between the summers of 1990 (Rasmussen et.al. 1993) and 2005 (Pastore et al. 2005)the total number of individuals decreased in 68%. Thus,the aim of this study is provide the first information on the diet of the Imperial Shag breeding at NHL to improve the knowledge of the foraging behavior of this species as well as to explore the linkage between diet composition and the reported declining trend of this population.
publishDate 2010
dc.date.none.fl_str_mv 2010-09
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/11336/257827
Casaux, Ricardo Jorge; Bertolin, María Lila; Tartara, Maria Alejandra; Alarcón, Pablo Angel Eduardo; Porro, Gerardo; The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?; Neotropical Ornithological Society; Ornitología Neotropical; 21; 3; 9-2010; 457-162
1075-4377
CONICET Digital
CONICET
url http://hdl.handle.net/11336/257827
identifier_str_mv Casaux, Ricardo Jorge; Bertolin, María Lila; Tartara, Maria Alejandra; Alarcón, Pablo Angel Eduardo; Porro, Gerardo; The unexpected diet of breeding Imperial Shags (Phalacrocorax atriceps) at the Nahuel Huapi Lake, Patagonia: implications on population trends?; Neotropical Ornithological Society; Ornitología Neotropical; 21; 3; 9-2010; 457-162
1075-4377
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://digitalcommons.usf.edu/ornitologia_neotropical/vol21/iss3/14/
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Neotropical Ornithological Society
publisher.none.fl_str_mv Neotropical Ornithological Society
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 13.13397

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