Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina

Autores
Di Prinzio, Cecilia Yanina; Omad, Guillermo Hugo; Miserendino, Maria Laura; Casaux, Ricardo Jorge
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Background It is well known that fish predation alters ecosystem processes by top-down effects. Salmonids are described as aggressive, visually and size-selective predators. Thus, prey selection by the non-native rainbow trout was examined on a seasonal basis at two streams: Nant y Fall (NyF) and Cabeza de Vaca (CVA) at Patagonia, a region where this kind of information is lacking. Results The benthos density at NyF was higher than that at CVA, and at both streams, riffles supported higher macroinvertebrate densities than pools. The diet of trouts from both streams was dominated by aquatic macroinvertebrates, was diverse, and was varied seasonally. The individuals represented in the stomach contents were among the largest available at the streams. Diet diversity peaked during spring at NyF and during summer at CVA, whereas at both streams, the niche width peaked during spring. Prey selectivity varied seasonally. The selected preys included both aquatic (Gasteropoda, Crustacea, Plecoptera, Trichoptera, Ephemeroptera, Coleoptera, Diptera, and Odonata) and terrestrial organisms (adult dipterans, Oligochaeta, Araneae, Homoptera, Hymenoptera, Orthoptera, and Hemiptera). Some infaunal invertebrates like oligochaetes and some small Coleoptera and Diptera larvae (mainly Chironomidae) were not selected by trouts. Conclusions Despite of the overall dominance of trichopteran species, the composition of the diet of the rainbow trout varied seasonally. This fish positively selected both aquatic and terrestrial organisms. We observed that in both streams, trouts consumed the larger individuals available in those 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
Fil: Omad, Guillermo Hugo. 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
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
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
Materia
Selective predation
Non-native fish
Stream
Patagonia
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5607
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5607
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in ArgentinaDi Prinzio, Cecilia YaninaOmad, Guillermo HugoMiserendino, Maria LauraCasaux, Ricardo JorgeSelective predationNon-native fishStreamPatagoniahttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Background It is well known that fish predation alters ecosystem processes by top-down effects. Salmonids are described as aggressive, visually and size-selective predators. Thus, prey selection by the non-native rainbow trout was examined on a seasonal basis at two streams: Nant y Fall (NyF) and Cabeza de Vaca (CVA) at Patagonia, a region where this kind of information is lacking. Results The benthos density at NyF was higher than that at CVA, and at both streams, riffles supported higher macroinvertebrate densities than pools. The diet of trouts from both streams was dominated by aquatic macroinvertebrates, was diverse, and was varied seasonally. The individuals represented in the stomach contents were among the largest available at the streams. Diet diversity peaked during spring at NyF and during summer at CVA, whereas at both streams, the niche width peaked during spring. Prey selectivity varied seasonally. The selected preys included both aquatic (Gasteropoda, Crustacea, Plecoptera, Trichoptera, Ephemeroptera, Coleoptera, Diptera, and Odonata) and terrestrial organisms (adult dipterans, Oligochaeta, Araneae, Homoptera, Hymenoptera, Orthoptera, and Hemiptera). Some infaunal invertebrates like oligochaetes and some small Coleoptera and Diptera larvae (mainly Chironomidae) were not selected by trouts. Conclusions Despite of the overall dominance of trichopteran species, the composition of the diet of the rainbow trout varied seasonally. This fish positively selected both aquatic and terrestrial organisms. We observed that in both streams, trouts consumed the larger individuals available in those 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; ArgentinaFil: Omad, Guillermo Hugo. 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; 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; 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; ArgentinaSpringer2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5607Di Prinzio, Cecilia Yanina; Omad, Guillermo Hugo; Miserendino, Maria Laura; Casaux, Ricardo Jorge; Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina; Springer; Zoological Studies; 54; 29; 2-2015; 1-141021-5506enginfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1186/s40555-015-0108-9info:eu-repo/semantics/altIdentifier/doi/10.1186/s40555-015-0108-9info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:40Zoai:ri.conicet.gov.ar:11336/5607instacron: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 09:33:41.121CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
title Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
spellingShingle Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
Di Prinzio, Cecilia Yanina
Selective predation
Non-native fish
Stream
Patagonia
title_short Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
title_full Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
title_fullStr Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
title_full_unstemmed Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
title_sort Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
dc.creator.none.fl_str_mv Di Prinzio, Cecilia Yanina
Omad, Guillermo Hugo
Miserendino, Maria Laura
Casaux, Ricardo Jorge
author Di Prinzio, Cecilia Yanina
author_facet Di Prinzio, Cecilia Yanina
Omad, Guillermo Hugo
Miserendino, Maria Laura
Casaux, Ricardo Jorge
author_role author
author2 Omad, Guillermo Hugo
Miserendino, Maria Laura
Casaux, Ricardo Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Selective predation
Non-native fish
Stream
Patagonia
topic Selective predation
Non-native fish
Stream
Patagonia
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Background It is well known that fish predation alters ecosystem processes by top-down effects. Salmonids are described as aggressive, visually and size-selective predators. Thus, prey selection by the non-native rainbow trout was examined on a seasonal basis at two streams: Nant y Fall (NyF) and Cabeza de Vaca (CVA) at Patagonia, a region where this kind of information is lacking. Results The benthos density at NyF was higher than that at CVA, and at both streams, riffles supported higher macroinvertebrate densities than pools. The diet of trouts from both streams was dominated by aquatic macroinvertebrates, was diverse, and was varied seasonally. The individuals represented in the stomach contents were among the largest available at the streams. Diet diversity peaked during spring at NyF and during summer at CVA, whereas at both streams, the niche width peaked during spring. Prey selectivity varied seasonally. The selected preys included both aquatic (Gasteropoda, Crustacea, Plecoptera, Trichoptera, Ephemeroptera, Coleoptera, Diptera, and Odonata) and terrestrial organisms (adult dipterans, Oligochaeta, Araneae, Homoptera, Hymenoptera, Orthoptera, and Hemiptera). Some infaunal invertebrates like oligochaetes and some small Coleoptera and Diptera larvae (mainly Chironomidae) were not selected by trouts. Conclusions Despite of the overall dominance of trichopteran species, the composition of the diet of the rainbow trout varied seasonally. This fish positively selected both aquatic and terrestrial organisms. We observed that in both streams, trouts consumed the larger individuals available in those 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
Fil: Omad, Guillermo Hugo. 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
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
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
description Background It is well known that fish predation alters ecosystem processes by top-down effects. Salmonids are described as aggressive, visually and size-selective predators. Thus, prey selection by the non-native rainbow trout was examined on a seasonal basis at two streams: Nant y Fall (NyF) and Cabeza de Vaca (CVA) at Patagonia, a region where this kind of information is lacking. Results The benthos density at NyF was higher than that at CVA, and at both streams, riffles supported higher macroinvertebrate densities than pools. The diet of trouts from both streams was dominated by aquatic macroinvertebrates, was diverse, and was varied seasonally. The individuals represented in the stomach contents were among the largest available at the streams. Diet diversity peaked during spring at NyF and during summer at CVA, whereas at both streams, the niche width peaked during spring. Prey selectivity varied seasonally. The selected preys included both aquatic (Gasteropoda, Crustacea, Plecoptera, Trichoptera, Ephemeroptera, Coleoptera, Diptera, and Odonata) and terrestrial organisms (adult dipterans, Oligochaeta, Araneae, Homoptera, Hymenoptera, Orthoptera, and Hemiptera). Some infaunal invertebrates like oligochaetes and some small Coleoptera and Diptera larvae (mainly Chironomidae) were not selected by trouts. Conclusions Despite of the overall dominance of trichopteran species, the composition of the diet of the rainbow trout varied seasonally. This fish positively selected both aquatic and terrestrial organisms. We observed that in both streams, trouts consumed the larger individuals available in those environments.
publishDate 2015
dc.date.none.fl_str_mv 2015-02
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/11336/5607
Di Prinzio, Cecilia Yanina; Omad, Guillermo Hugo; Miserendino, Maria Laura; Casaux, Ricardo Jorge; Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina; Springer; Zoological Studies; 54; 29; 2-2015; 1-14
1021-5506
url http://hdl.handle.net/11336/5607
identifier_str_mv Di Prinzio, Cecilia Yanina; Omad, Guillermo Hugo; Miserendino, Maria Laura; Casaux, Ricardo Jorge; Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina; Springer; Zoological Studies; 54; 29; 2-2015; 1-14
1021-5506
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1186/s40555-015-0108-9
info:eu-repo/semantics/altIdentifier/doi/10.1186/s40555-015-0108-9
info:eu-repo/semantics/altIdentifier/doi/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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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