Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish

Autores
Alarcón, Pablo Angel Eduardo; Macchi, Patricio Jorge; Trejo, Ana Raquel; Alonso, Marcelo Fabián
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The diet of the Neotropical Cormorant (Phalacrocorax brasilianus) was evaluated in the Limay River basin, a freshwater system invaded by exotic salmonids. Analyses of 106 pellets showed that fish were the most important prey (79.9% by numerical frequency and 86.2% by frequency of occurrence), followed by two crustacean species. Among fish, the most common species were exotic salmonids, representing 84% by numerical frequency. Morphometric comparisons enabled differentiation of sagitta otoliths from Oncorhynchus mykiss and Salmo trutta and permitted determination of similar contributions of these species to the diet. Although a wide prey-size range was found, 85% of fish were smaller than 150 mm in length. The results suggest that the Neotropical Cormorant has adapted to changes in the fish community after the introduction of salmonids. Flexible feeding strategies of the Neotropical Cormorant and/or its capacity to exploit different environments probably make it less vulnerable to environmental changes produced by introduction of exotic fish.
Fil: Alarcón, Pablo Angel Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Macchi, Patricio Jorge. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Trejo, Ana Raquel. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Alonso, Marcelo Fabián. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Materia
Exotic Fish
Feeding Plasticity
Patagonian Environments
Phalacrocorax Brasilianus
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:11336/73502
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic FishAlarcón, Pablo Angel EduardoMacchi, Patricio JorgeTrejo, Ana RaquelAlonso, Marcelo FabiánExotic FishFeeding PlasticityPatagonian EnvironmentsPhalacrocorax Brasilianushttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The diet of the Neotropical Cormorant (Phalacrocorax brasilianus) was evaluated in the Limay River basin, a freshwater system invaded by exotic salmonids. Analyses of 106 pellets showed that fish were the most important prey (79.9% by numerical frequency and 86.2% by frequency of occurrence), followed by two crustacean species. Among fish, the most common species were exotic salmonids, representing 84% by numerical frequency. Morphometric comparisons enabled differentiation of sagitta otoliths from Oncorhynchus mykiss and Salmo trutta and permitted determination of similar contributions of these species to the diet. Although a wide prey-size range was found, 85% of fish were smaller than 150 mm in length. The results suggest that the Neotropical Cormorant has adapted to changes in the fish community after the introduction of salmonids. Flexible feeding strategies of the Neotropical Cormorant and/or its capacity to exploit different environments probably make it less vulnerable to environmental changes produced by introduction of exotic fish.Fil: Alarcón, Pablo Angel Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Macchi, Patricio Jorge. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; ArgentinaFil: Trejo, Ana Raquel. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; ArgentinaFil: Alonso, Marcelo Fabián. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; ArgentinaWaterbird Society2012-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/73502Alarcón, Pablo Angel Eduardo; Macchi, Patricio Jorge; Trejo, Ana Raquel; Alonso, Marcelo Fabián; Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish; Waterbird Society; Waterbirds; 35; 1; 1-3-2012; 149-1531524-4695CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1675/063.035.0115info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/waterbirds/volume-35/issue-1/063.035.0115/Diet-of-the-Neotropical-Cormorant-iPhalacrocorax-brasilianus-i-in-a/10.1675/063.035.0115.shortinfo:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/full/10.1675/063.035.0115info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:38:11Zoai:ri.conicet.gov.ar:11336/73502instacron: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 09:38:11.775CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
title Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
spellingShingle Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
Alarcón, Pablo Angel Eduardo
Exotic Fish
Feeding Plasticity
Patagonian Environments
Phalacrocorax Brasilianus
title_short Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
title_full Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
title_fullStr Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
title_full_unstemmed Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
title_sort Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish
dc.creator.none.fl_str_mv Alarcón, Pablo Angel Eduardo
Macchi, Patricio Jorge
Trejo, Ana Raquel
Alonso, Marcelo Fabián
author Alarcón, Pablo Angel Eduardo
author_facet Alarcón, Pablo Angel Eduardo
Macchi, Patricio Jorge
Trejo, Ana Raquel
Alonso, Marcelo Fabián
author_role author
author2 Macchi, Patricio Jorge
Trejo, Ana Raquel
Alonso, Marcelo Fabián
author2_role author
author
author
dc.subject.none.fl_str_mv Exotic Fish
Feeding Plasticity
Patagonian Environments
Phalacrocorax Brasilianus
topic Exotic Fish
Feeding Plasticity
Patagonian Environments
Phalacrocorax Brasilianus
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 diet of the Neotropical Cormorant (Phalacrocorax brasilianus) was evaluated in the Limay River basin, a freshwater system invaded by exotic salmonids. Analyses of 106 pellets showed that fish were the most important prey (79.9% by numerical frequency and 86.2% by frequency of occurrence), followed by two crustacean species. Among fish, the most common species were exotic salmonids, representing 84% by numerical frequency. Morphometric comparisons enabled differentiation of sagitta otoliths from Oncorhynchus mykiss and Salmo trutta and permitted determination of similar contributions of these species to the diet. Although a wide prey-size range was found, 85% of fish were smaller than 150 mm in length. The results suggest that the Neotropical Cormorant has adapted to changes in the fish community after the introduction of salmonids. Flexible feeding strategies of the Neotropical Cormorant and/or its capacity to exploit different environments probably make it less vulnerable to environmental changes produced by introduction of exotic fish.
Fil: Alarcón, Pablo Angel Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Macchi, Patricio Jorge. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Trejo, Ana Raquel. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Alonso, Marcelo Fabián. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
description The diet of the Neotropical Cormorant (Phalacrocorax brasilianus) was evaluated in the Limay River basin, a freshwater system invaded by exotic salmonids. Analyses of 106 pellets showed that fish were the most important prey (79.9% by numerical frequency and 86.2% by frequency of occurrence), followed by two crustacean species. Among fish, the most common species were exotic salmonids, representing 84% by numerical frequency. Morphometric comparisons enabled differentiation of sagitta otoliths from Oncorhynchus mykiss and Salmo trutta and permitted determination of similar contributions of these species to the diet. Although a wide prey-size range was found, 85% of fish were smaller than 150 mm in length. The results suggest that the Neotropical Cormorant has adapted to changes in the fish community after the introduction of salmonids. Flexible feeding strategies of the Neotropical Cormorant and/or its capacity to exploit different environments probably make it less vulnerable to environmental changes produced by introduction of exotic fish.
publishDate 2012
dc.date.none.fl_str_mv 2012-03-01
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/11336/73502
Alarcón, Pablo Angel Eduardo; Macchi, Patricio Jorge; Trejo, Ana Raquel; Alonso, Marcelo Fabián; Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish; Waterbird Society; Waterbirds; 35; 1; 1-3-2012; 149-153
1524-4695
CONICET Digital
CONICET
url http://hdl.handle.net/11336/73502
identifier_str_mv Alarcón, Pablo Angel Eduardo; Macchi, Patricio Jorge; Trejo, Ana Raquel; Alonso, Marcelo Fabián; Diet of the Neotropical Cormorant (Phalacrocorax brasilianus) in a Patagonian Freshwater Environment Invaded by Exotic Fish; Waterbird Society; Waterbirds; 35; 1; 1-3-2012; 149-153
1524-4695
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1675/063.035.0115
info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/waterbirds/volume-35/issue-1/063.035.0115/Diet-of-the-Neotropical-Cormorant-iPhalacrocorax-brasilianus-i-in-a/10.1675/063.035.0115.short
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/full/10.1675/063.035.0115
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
dc.publisher.none.fl_str_mv Waterbird Society
publisher.none.fl_str_mv Waterbird 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 13.070432

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