Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams

Autores
Di Prinzio, Cecilia Yanina; Miserendino, Maria Laura; Casaux, Ricardo Jorge
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The dietary composition and feeding strategy of rainbow trout, Oncorhynchus mykiss (Walbaum), in two low-order Patagonian streams were studied. Benthic macroinvertebrate availability was estimated in both riffles and pools. Fish stomach contents were examined to determine prey richness and diversity, prey electivity, food-niche width, and the feeding strategy employed by trout throughout the year. Availability of benthos varied seasonally with Ephemeroptera, Trichoptera, Plecoptera and Diptera species dominating. Rainbow trout diet was composed mainly of benthic macroinvertebrates, followed by terrestrial insects, fish, algae and plants. Different trout size classes segregated the use of food resources to reduce predation pressure. Elected prey included organisms displaying no to high mobility. A high feeding plasticity allows trout to buffer changes in food availability by switching from a specialised to a generalised feeding behaviour. Consequently, trout may exploit abundant but temporary food resources opportunistically, which would explain their marked expansion in Patagonian environments.
Fil: Di Prinzio, Cecilia Yanina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Miserendino, Maria Laura. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Casaux, Ricardo Jorge. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
BENTHOS AVAILABILITY
DIET COMPOSITION
EXOTIC TROUT
FEEDING STRATEGY
PATAGONIA
STREAM
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:11336/3464
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streamsDi Prinzio, Cecilia YaninaMiserendino, Maria LauraCasaux, Ricardo JorgeBENTHOS AVAILABILITYDIET COMPOSITIONEXOTIC TROUTFEEDING STRATEGYPATAGONIASTREAMhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The dietary composition and feeding strategy of rainbow trout, Oncorhynchus mykiss (Walbaum), in two low-order Patagonian streams were studied. Benthic macroinvertebrate availability was estimated in both riffles and pools. Fish stomach contents were examined to determine prey richness and diversity, prey electivity, food-niche width, and the feeding strategy employed by trout throughout the year. Availability of benthos varied seasonally with Ephemeroptera, Trichoptera, Plecoptera and Diptera species dominating. Rainbow trout diet was composed mainly of benthic macroinvertebrates, followed by terrestrial insects, fish, algae and plants. Different trout size classes segregated the use of food resources to reduce predation pressure. Elected prey included organisms displaying no to high mobility. A high feeding plasticity allows trout to buffer changes in food availability by switching from a specialised to a generalised feeding behaviour. Consequently, trout may exploit abundant but temporary food resources opportunistically, which would explain their marked expansion in Patagonian environments.Fil: Di Prinzio, Cecilia Yanina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Miserendino, Maria Laura. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Casaux, Ricardo Jorge. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaWiley Blackwell Publishing, Inc2013-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/3464Di Prinzio, Cecilia Yanina; Miserendino, Maria Laura; Casaux, Ricardo Jorge; Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams; Wiley Blackwell Publishing, Inc; Fisheries Management and Ecology; 20; 5; 10-2013; 414-4250969-997Xenginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/fme.12028/abstractinfo:eu-repo/semantics/altIdentifier/doi/DOI:10.1111/fme.12028info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:14Zoai:ri.conicet.gov.ar:11336/3464instacron: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 10:02:14.486CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
title Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
spellingShingle Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
Di Prinzio, Cecilia Yanina
BENTHOS AVAILABILITY
DIET COMPOSITION
EXOTIC TROUT
FEEDING STRATEGY
PATAGONIA
STREAM
title_short Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
title_full Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
title_fullStr Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
title_full_unstemmed Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
title_sort Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams
dc.creator.none.fl_str_mv Di Prinzio, Cecilia Yanina
Miserendino, Maria Laura
Casaux, Ricardo Jorge
author Di Prinzio, Cecilia Yanina
author_facet Di Prinzio, Cecilia Yanina
Miserendino, Maria Laura
Casaux, Ricardo Jorge
author_role author
author2 Miserendino, Maria Laura
Casaux, Ricardo Jorge
author2_role author
author
dc.subject.none.fl_str_mv BENTHOS AVAILABILITY
DIET COMPOSITION
EXOTIC TROUT
FEEDING STRATEGY
PATAGONIA
STREAM
topic BENTHOS AVAILABILITY
DIET COMPOSITION
EXOTIC TROUT
FEEDING STRATEGY
PATAGONIA
STREAM
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The dietary composition and feeding strategy of rainbow trout, Oncorhynchus mykiss (Walbaum), in two low-order Patagonian streams were studied. Benthic macroinvertebrate availability was estimated in both riffles and pools. Fish stomach contents were examined to determine prey richness and diversity, prey electivity, food-niche width, and the feeding strategy employed by trout throughout the year. Availability of benthos varied seasonally with Ephemeroptera, Trichoptera, Plecoptera and Diptera species dominating. Rainbow trout diet was composed mainly of benthic macroinvertebrates, followed by terrestrial insects, fish, algae and plants. Different trout size classes segregated the use of food resources to reduce predation pressure. Elected prey included organisms displaying no to high mobility. A high feeding plasticity allows trout to buffer changes in food availability by switching from a specialised to a generalised feeding behaviour. Consequently, trout may exploit abundant but temporary food resources opportunistically, which would explain their marked expansion in Patagonian environments.
Fil: Di Prinzio, Cecilia Yanina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Miserendino, Maria Laura. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Casaux, Ricardo Jorge. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The dietary composition and feeding strategy of rainbow trout, Oncorhynchus mykiss (Walbaum), in two low-order Patagonian streams were studied. Benthic macroinvertebrate availability was estimated in both riffles and pools. Fish stomach contents were examined to determine prey richness and diversity, prey electivity, food-niche width, and the feeding strategy employed by trout throughout the year. Availability of benthos varied seasonally with Ephemeroptera, Trichoptera, Plecoptera and Diptera species dominating. Rainbow trout diet was composed mainly of benthic macroinvertebrates, followed by terrestrial insects, fish, algae and plants. Different trout size classes segregated the use of food resources to reduce predation pressure. Elected prey included organisms displaying no to high mobility. A high feeding plasticity allows trout to buffer changes in food availability by switching from a specialised to a generalised feeding behaviour. Consequently, trout may exploit abundant but temporary food resources opportunistically, which would explain their marked expansion in Patagonian environments.
publishDate 2013
dc.date.none.fl_str_mv 2013-10
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/11336/3464
Di Prinzio, Cecilia Yanina; Miserendino, Maria Laura; Casaux, Ricardo Jorge; Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams; Wiley Blackwell Publishing, Inc; Fisheries Management and Ecology; 20; 5; 10-2013; 414-425
0969-997X
url http://hdl.handle.net/11336/3464
identifier_str_mv Di Prinzio, Cecilia Yanina; Miserendino, Maria Laura; Casaux, Ricardo Jorge; Feeding strategy of the non-native rainbow trout, Oncorhynchus mykiss, in low-order Patagonian streams; Wiley Blackwell Publishing, Inc; Fisheries Management and Ecology; 20; 5; 10-2013; 414-425
0969-997X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/fme.12028/abstract
info:eu-repo/semantics/altIdentifier/doi/DOI:10.1111/fme.12028
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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
_version_ 1842269745650335744
score 13.13397

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