Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe

Autores
Lancelotti, Julio Lucio; Bandieri, Lucas Martín; Pascual, Miguel Alberto
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The lakes of the basaltic plateaus of Patagonia represent the only reproductive habitat for the critically endangered Hooded Grebe (Podiceps gallardoi). More than 50 of these naturally fishless lakes have been stocked with the exotic Rainbow Trout (Oncorhynchus mykiss). While the available information suggests that the diet composition of trout and Hooded Grebes could overlap, to date no formal studies of the diet of Rainbow Trout in these aquatic environments have been published. We characterized the diet of trout in one of the primary reproductive areas of the Hooded Grebe based on the analysis of the gut contents of 177 individuals, from 9 lakes. Amphipods were clearly the most dominant group of prey, quantified as frequency of occurrence and proportion by weight. The condition factor of trout and the abundance of amphipods in the stomach contents showed a functional relationship, suggesting that the wellness of trout depends on the availability of this prey. Amphipods also represent a primary prey for the Hooded Grebe, suggesting a strong dietary overlap with the trout. The presence of trout may generate processes of competition that could affect the survival of the Hooded Grebe. This interaction may be particularly relevant in large vegetated lakes, where the Hooded Grebe reproduces.
Fil: Lancelotti, Julio Lucio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Bandieri, Lucas Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia Austral; Argentina
Materia
AQUACULTURE
DIETARY OVERLAP
EXOTIC SPECIES
PATAGONIA
SPECIES INTERACTIONS
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:11336/5612
Acceder
id CONICETDig_3ea5822cbab43194a1b67440e1b9a6f6
oai_identifier_str oai:ri.conicet.gov.ar:11336/5612
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded GrebeRégime alimentaire de la truite arc-en-ciel introduite dans l’habitat essentiel du grèbe mitré menacéLancelotti, Julio LucioBandieri, Lucas MartínPascual, Miguel AlbertoAQUACULTUREDIETARY OVERLAPEXOTIC SPECIESPATAGONIASPECIES INTERACTIONShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The lakes of the basaltic plateaus of Patagonia represent the only reproductive habitat for the critically endangered Hooded Grebe (Podiceps gallardoi). More than 50 of these naturally fishless lakes have been stocked with the exotic Rainbow Trout (Oncorhynchus mykiss). While the available information suggests that the diet composition of trout and Hooded Grebes could overlap, to date no formal studies of the diet of Rainbow Trout in these aquatic environments have been published. We characterized the diet of trout in one of the primary reproductive areas of the Hooded Grebe based on the analysis of the gut contents of 177 individuals, from 9 lakes. Amphipods were clearly the most dominant group of prey, quantified as frequency of occurrence and proportion by weight. The condition factor of trout and the abundance of amphipods in the stomach contents showed a functional relationship, suggesting that the wellness of trout depends on the availability of this prey. Amphipods also represent a primary prey for the Hooded Grebe, suggesting a strong dietary overlap with the trout. The presence of trout may generate processes of competition that could affect the survival of the Hooded Grebe. This interaction may be particularly relevant in large vegetated lakes, where the Hooded Grebe reproduces.Fil: Lancelotti, Julio Lucio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Bandieri, Lucas Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia Austral; ArgentinaEDP Sciences2015-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5612Lancelotti, Julio Lucio; Bandieri, Lucas Martín; Pascual, Miguel Alberto; Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe; EDP Sciences; Knowledge and Management of Aquatic Ecosystems; 416; 26; 10-2015; 1-111961-9502enginfo:eu-repo/semantics/altIdentifier/url/http://www.kmae-journal.org/articles/kmae/abs/2015/01/kmae150057/kmae150057.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/kmae/2015022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:32:30Zoai:ri.conicet.gov.ar:11336/5612instacron: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 10:32:31.183CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
Régime alimentaire de la truite arc-en-ciel introduite dans l’habitat essentiel du grèbe mitré menacé
title Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
spellingShingle Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
Lancelotti, Julio Lucio
AQUACULTURE
DIETARY OVERLAP
EXOTIC SPECIES
PATAGONIA
SPECIES INTERACTIONS
title_short Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
title_full Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
title_fullStr Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
title_full_unstemmed Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
title_sort Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe
dc.creator.none.fl_str_mv Lancelotti, Julio Lucio
Bandieri, Lucas Martín
Pascual, Miguel Alberto
author Lancelotti, Julio Lucio
author_facet Lancelotti, Julio Lucio
Bandieri, Lucas Martín
Pascual, Miguel Alberto
author_role author
author2 Bandieri, Lucas Martín
Pascual, Miguel Alberto
author2_role author
author
dc.subject.none.fl_str_mv AQUACULTURE
DIETARY OVERLAP
EXOTIC SPECIES
PATAGONIA
SPECIES INTERACTIONS
topic AQUACULTURE
DIETARY OVERLAP
EXOTIC SPECIES
PATAGONIA
SPECIES INTERACTIONS
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 lakes of the basaltic plateaus of Patagonia represent the only reproductive habitat for the critically endangered Hooded Grebe (Podiceps gallardoi). More than 50 of these naturally fishless lakes have been stocked with the exotic Rainbow Trout (Oncorhynchus mykiss). While the available information suggests that the diet composition of trout and Hooded Grebes could overlap, to date no formal studies of the diet of Rainbow Trout in these aquatic environments have been published. We characterized the diet of trout in one of the primary reproductive areas of the Hooded Grebe based on the analysis of the gut contents of 177 individuals, from 9 lakes. Amphipods were clearly the most dominant group of prey, quantified as frequency of occurrence and proportion by weight. The condition factor of trout and the abundance of amphipods in the stomach contents showed a functional relationship, suggesting that the wellness of trout depends on the availability of this prey. Amphipods also represent a primary prey for the Hooded Grebe, suggesting a strong dietary overlap with the trout. The presence of trout may generate processes of competition that could affect the survival of the Hooded Grebe. This interaction may be particularly relevant in large vegetated lakes, where the Hooded Grebe reproduces.
Fil: Lancelotti, Julio Lucio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Bandieri, Lucas Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia Austral; Argentina
description The lakes of the basaltic plateaus of Patagonia represent the only reproductive habitat for the critically endangered Hooded Grebe (Podiceps gallardoi). More than 50 of these naturally fishless lakes have been stocked with the exotic Rainbow Trout (Oncorhynchus mykiss). While the available information suggests that the diet composition of trout and Hooded Grebes could overlap, to date no formal studies of the diet of Rainbow Trout in these aquatic environments have been published. We characterized the diet of trout in one of the primary reproductive areas of the Hooded Grebe based on the analysis of the gut contents of 177 individuals, from 9 lakes. Amphipods were clearly the most dominant group of prey, quantified as frequency of occurrence and proportion by weight. The condition factor of trout and the abundance of amphipods in the stomach contents showed a functional relationship, suggesting that the wellness of trout depends on the availability of this prey. Amphipods also represent a primary prey for the Hooded Grebe, suggesting a strong dietary overlap with the trout. The presence of trout may generate processes of competition that could affect the survival of the Hooded Grebe. This interaction may be particularly relevant in large vegetated lakes, where the Hooded Grebe reproduces.
publishDate 2015
dc.date.none.fl_str_mv 2015-10
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/11336/5612
Lancelotti, Julio Lucio; Bandieri, Lucas Martín; Pascual, Miguel Alberto; Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe; EDP Sciences; Knowledge and Management of Aquatic Ecosystems; 416; 26; 10-2015; 1-11
1961-9502
url http://hdl.handle.net/11336/5612
identifier_str_mv Lancelotti, Julio Lucio; Bandieri, Lucas Martín; Pascual, Miguel Alberto; Diet of the exotic Rainbow Trout in the critical habitat of the threatened Hooded Grebe; EDP Sciences; Knowledge and Management of Aquatic Ecosystems; 416; 26; 10-2015; 1-11
1961-9502
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.kmae-journal.org/articles/kmae/abs/2015/01/kmae150057/kmae150057.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/kmae/2015022
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 EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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_ 1844614338892005376
score 13.070432

Publicaciones similares